./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrstr-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_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/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_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/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_024c6c05-d6c4-45a2-a300-5ab81aa54459/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 991fb09b573d5827d0db553f1ea89a581f5a664ba8b68d6f14a043df738f2f6d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 14:05:07,160 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 14:05:07,218 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-13 14:05:07,225 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 14:05:07,225 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 14:05:07,268 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 14:05:07,269 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 14:05:07,269 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 14:05:07,269 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 14:05:07,269 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 14:05:07,269 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 14:05:07,269 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 14:05:07,270 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 14:05:07,270 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 14:05:07,270 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 14:05:07,270 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 14:05:07,270 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 14:05:07,271 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 14:05:07,272 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 14:05:07,272 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 14:05:07,272 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 14:05:07,272 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 14:05:07,272 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 14:05:07,272 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 14:05:07,272 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 14:05:07,272 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 14:05:07,273 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 14:05:07,273 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 14:05:07,273 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 14:05:07,273 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 14:05:07,273 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 14:05:07,273 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 14:05:07,273 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 14:05:07,273 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:05:07,273 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 14:05:07,274 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 14:05:07,274 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 14:05:07,274 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 14:05:07,274 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 14:05:07,274 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 14:05:07,274 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 14:05:07,274 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 14:05:07,274 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_024c6c05-d6c4-45a2-a300-5ab81aa54459/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 -> 991fb09b573d5827d0db553f1ea89a581f5a664ba8b68d6f14a043df738f2f6d [2024-11-13 14:05:07,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 14:05:07,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 14:05:07,608 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 14:05:07,609 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 14:05:07,610 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 14:05:07,611 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i Unable to find full path for "g++" [2024-11-13 14:05:09,522 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 14:05:09,923 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 14:05:09,925 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i [2024-11-13 14:05:09,947 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/data/30f7ba0d9/179799dbd5634c2a800ecaef3ca41d73/FLAGcca5e82b0 [2024-11-13 14:05:09,967 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/data/30f7ba0d9/179799dbd5634c2a800ecaef3ca41d73 [2024-11-13 14:05:09,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 14:05:09,973 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 14:05:09,976 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 14:05:09,977 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 14:05:09,982 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 14:05:09,982 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:05:09" (1/1) ... [2024-11-13 14:05:09,983 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6566912 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:05:09, skipping insertion in model container [2024-11-13 14:05:09,986 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:05:09" (1/1) ... [2024-11-13 14:05:10,025 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 14:05:10,326 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 14:05:10,327 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 14:05:10,331 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:05:10,342 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 14:05:10,407 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:05:10,434 INFO L204 MainTranslator]: Completed translation [2024-11-13 14:05:10,435 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:05:10 WrapperNode [2024-11-13 14:05:10,435 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 14:05:10,436 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 14:05:10,436 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 14:05:10,436 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 14:05:10,441 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:05:10" (1/1) ... [2024-11-13 14:05:10,452 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:05:10" (1/1) ... [2024-11-13 14:05:10,473 INFO L138 Inliner]: procedures = 119, calls = 23, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 160 [2024-11-13 14:05:10,473 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 14:05:10,474 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 14:05:10,474 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 14:05:10,474 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 14:05:10,483 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:05:10" (1/1) ... [2024-11-13 14:05:10,483 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:05:10" (1/1) ... [2024-11-13 14:05:10,486 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:05:10" (1/1) ... [2024-11-13 14:05:10,515 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [6, 6]. 50 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 14:05:10,515 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:05:10" (1/1) ... [2024-11-13 14:05:10,515 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:05:10" (1/1) ... [2024-11-13 14:05:10,530 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:05:10" (1/1) ... [2024-11-13 14:05:10,536 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:05:10" (1/1) ... [2024-11-13 14:05:10,541 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:05:10" (1/1) ... [2024-11-13 14:05:10,542 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:05:10" (1/1) ... [2024-11-13 14:05:10,544 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 14:05:10,545 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 14:05:10,545 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 14:05:10,545 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 14:05:10,546 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:05:10" (1/1) ... [2024-11-13 14:05:10,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:05:10,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:05:10,576 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 14:05:10,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 14:05:10,604 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 14:05:10,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 14:05:10,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 14:05:10,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 14:05:10,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 14:05:10,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 14:05:10,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 14:05:10,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 14:05:10,752 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 14:05:10,754 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 14:05:11,101 INFO L? ?]: Removed 97 outVars from TransFormulas that were not future-live. [2024-11-13 14:05:11,101 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 14:05:11,111 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 14:05:11,111 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-13 14:05:11,112 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:05:11 BoogieIcfgContainer [2024-11-13 14:05:11,112 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 14:05:11,114 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 14:05:11,114 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 14:05:11,119 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 14:05:11,119 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:05:09" (1/3) ... [2024-11-13 14:05:11,120 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@663f597d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:05:11, skipping insertion in model container [2024-11-13 14:05:11,120 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:05:10" (2/3) ... [2024-11-13 14:05:11,120 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@663f597d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:05:11, skipping insertion in model container [2024-11-13 14:05:11,120 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:05:11" (3/3) ... [2024-11-13 14:05:11,122 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrstr-alloca-2.i [2024-11-13 14:05:11,137 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 14:05:11,138 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG openbsd_cstrstr-alloca-2.i that has 1 procedures, 76 locations, 1 initial locations, 6 loop locations, and 25 error locations. [2024-11-13 14:05:11,177 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 14:05:11,193 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;@103ed4b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 14:05:11,193 INFO L334 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2024-11-13 14:05:11,198 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 50 states have (on average 1.88) internal successors, (94), 75 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 14:05:11,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-13 14:05:11,204 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:05:11,205 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:05:11,206 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:05:11,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:05:11,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2024-11-13 14:05:11,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:05:11,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732983894] [2024-11-13 14:05:11,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:11,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:05:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:11,625 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 14:05:11,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:05:11,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732983894] [2024-11-13 14:05:11,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732983894] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:05:11,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:05:11,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 14:05:11,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224536706] [2024-11-13 14:05:11,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:05:11,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:05:11,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:05:11,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:05:11,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 14:05:11,663 INFO L87 Difference]: Start difference. First operand has 76 states, 50 states have (on average 1.88) internal successors, (94), 75 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) 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 14:05:11,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:05:11,767 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2024-11-13 14:05:11,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:05:11,769 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 14:05:11,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:05:11,779 INFO L225 Difference]: With dead ends: 74 [2024-11-13 14:05:11,779 INFO L226 Difference]: Without dead ends: 72 [2024-11-13 14:05:11,781 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 14:05:11,783 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 15 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:05:11,784 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 122 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:05:11,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-13 14:05:11,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-11-13 14:05:11,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 71 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 14:05:11,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2024-11-13 14:05:11,822 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 7 [2024-11-13 14:05:11,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:05:11,822 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2024-11-13 14:05:11,823 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 14:05:11,823 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2024-11-13 14:05:11,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-13 14:05:11,823 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:05:11,824 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:05:11,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 14:05:11,824 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:05:11,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:05:11,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2024-11-13 14:05:11,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:05:11,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384372335] [2024-11-13 14:05:11,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:11,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:05:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:12,240 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 14:05:12,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:05:12,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384372335] [2024-11-13 14:05:12,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384372335] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:05:12,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:05:12,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 14:05:12,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039301558] [2024-11-13 14:05:12,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:05:12,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:05:12,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:05:12,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:05:12,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:05:12,244 INFO L87 Difference]: Start difference. First operand 72 states and 84 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 14:05:12,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:05:12,405 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2024-11-13 14:05:12,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:05:12,406 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 14:05:12,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:05:12,407 INFO L225 Difference]: With dead ends: 89 [2024-11-13 14:05:12,407 INFO L226 Difference]: Without dead ends: 89 [2024-11-13 14:05:12,407 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:05:12,408 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 17 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:05:12,408 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 279 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:05:12,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-13 14:05:12,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 76. [2024-11-13 14:05:12,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 53 states have (on average 1.679245283018868) internal successors, (89), 75 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:05:12,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2024-11-13 14:05:12,421 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 7 [2024-11-13 14:05:12,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:05:12,421 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2024-11-13 14:05:12,421 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 14:05:12,421 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2024-11-13 14:05:12,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-13 14:05:12,422 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:05:12,422 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:05:12,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 14:05:12,422 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:05:12,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:05:12,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2024-11-13 14:05:12,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:05:12,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960015294] [2024-11-13 14:05:12,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:12,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:05:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:12,730 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 14:05:12,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:05:12,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960015294] [2024-11-13 14:05:12,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960015294] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:05:12,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:05:12,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:05:12,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111758871] [2024-11-13 14:05:12,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:05:12,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:05:12,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:05:12,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:05:12,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:05:12,732 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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 14:05:12,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:05:12,851 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2024-11-13 14:05:12,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:05:12,852 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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 14:05:12,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:05:12,852 INFO L225 Difference]: With dead ends: 79 [2024-11-13 14:05:12,852 INFO L226 Difference]: Without dead ends: 79 [2024-11-13 14:05:12,853 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 14:05:12,854 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 38 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:05:12,854 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 189 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:05:12,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-13 14:05:12,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2024-11-13 14:05:12,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 73 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 14:05:12,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2024-11-13 14:05:12,865 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 7 [2024-11-13 14:05:12,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:05:12,866 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2024-11-13 14:05:12,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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 14:05:12,866 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2024-11-13 14:05:12,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 14:05:12,866 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:05:12,866 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:05:12,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 14:05:12,867 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:05:12,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:05:12,867 INFO L85 PathProgramCache]: Analyzing trace with hash 631249911, now seen corresponding path program 1 times [2024-11-13 14:05:12,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:05:12,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797468659] [2024-11-13 14:05:12,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:12,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:05:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:12,969 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 14:05:12,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:05:12,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797468659] [2024-11-13 14:05:12,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797468659] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:05:12,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865007644] [2024-11-13 14:05:12,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:12,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:05:12,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:05:12,973 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:05:12,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 14:05:13,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:13,064 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 14:05:13,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:05:13,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:05:13,158 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:05:13,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865007644] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:05:13,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:05:13,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-11-13 14:05:13,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875584679] [2024-11-13 14:05:13,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:05:13,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:05:13,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:05:13,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:05:13,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:05:13,161 INFO L87 Difference]: Start difference. First operand 74 states and 86 transitions. Second operand has 5 states, 5 states have (on average 2.0) 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 14:05:13,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:05:13,206 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2024-11-13 14:05:13,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:05:13,207 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) 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 14:05:13,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:05:13,208 INFO L225 Difference]: With dead ends: 88 [2024-11-13 14:05:13,208 INFO L226 Difference]: Without dead ends: 88 [2024-11-13 14:05:13,208 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:05:13,209 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 10 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:05:13,209 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 225 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:05:13,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-13 14:05:13,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2024-11-13 14:05:13,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 57 states have (on average 1.631578947368421) internal successors, (93), 79 states have internal predecessors, (93), 0 states have call successors, (0), 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 14:05:13,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2024-11-13 14:05:13,218 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 10 [2024-11-13 14:05:13,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:05:13,218 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2024-11-13 14:05:13,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) 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 14:05:13,223 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2024-11-13 14:05:13,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 14:05:13,223 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:05:13,223 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:05:13,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 14:05:13,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:05:13,424 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:05:13,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:05:13,424 INFO L85 PathProgramCache]: Analyzing trace with hash -178096715, now seen corresponding path program 1 times [2024-11-13 14:05:13,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:05:13,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770484011] [2024-11-13 14:05:13,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:13,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:05:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:13,874 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 14:05:13,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:05:13,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770484011] [2024-11-13 14:05:13,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770484011] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:05:13,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163695402] [2024-11-13 14:05:13,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:13,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:05:13,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:05:13,878 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:05:13,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 14:05:13,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:13,953 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-13 14:05:13,955 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:05:14,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:05:14,035 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 14:05:14,049 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 10 treesize of output 8 [2024-11-13 14:05:14,246 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 14:05:14,246 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:05:14,475 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:05:14,506 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 14:05:14,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163695402] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:05:14,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:05:14,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-13 14:05:14,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419437369] [2024-11-13 14:05:14,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:05:14,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 14:05:14,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:05:14,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 14:05:14,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-11-13 14:05:14,508 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 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 14:05:14,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:05:14,859 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2024-11-13 14:05:14,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 14:05:14,859 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 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 10 [2024-11-13 14:05:14,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:05:14,860 INFO L225 Difference]: With dead ends: 80 [2024-11-13 14:05:14,860 INFO L226 Difference]: Without dead ends: 80 [2024-11-13 14:05:14,860 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2024-11-13 14:05:14,861 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 16 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:05:14,861 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 506 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 14:05:14,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-13 14:05:14,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2024-11-13 14:05:14,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 56 states have (on average 1.625) internal successors, (91), 77 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:05:14,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2024-11-13 14:05:14,870 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 10 [2024-11-13 14:05:14,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:05:14,871 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2024-11-13 14:05:14,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 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 14:05:14,871 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2024-11-13 14:05:14,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-13 14:05:14,873 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:05:14,873 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:05:14,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 14:05:15,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:05:15,074 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:05:15,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:05:15,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1040722208, now seen corresponding path program 1 times [2024-11-13 14:05:15,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:05:15,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821491539] [2024-11-13 14:05:15,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:15,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:05:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:05:15,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:05:15,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821491539] [2024-11-13 14:05:15,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821491539] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:05:15,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:05:15,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 14:05:15,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075286414] [2024-11-13 14:05:15,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:05:15,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:05:15,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:05:15,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:05:15,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 14:05:15,119 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:05:15,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:05:15,164 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2024-11-13 14:05:15,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:05:15,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-13 14:05:15,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:05:15,165 INFO L225 Difference]: With dead ends: 76 [2024-11-13 14:05:15,165 INFO L226 Difference]: Without dead ends: 76 [2024-11-13 14:05:15,165 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 14:05:15,166 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 7 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:05:15,166 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 118 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:05:15,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-13 14:05:15,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-11-13 14:05:15,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 56 states have (on average 1.5892857142857142) internal successors, (89), 75 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:05:15,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2024-11-13 14:05:15,171 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 12 [2024-11-13 14:05:15,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:05:15,171 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2024-11-13 14:05:15,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:05:15,171 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2024-11-13 14:05:15,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-13 14:05:15,171 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:05:15,171 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:05:15,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 14:05:15,172 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:05:15,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:05:15,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1040722209, now seen corresponding path program 1 times [2024-11-13 14:05:15,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:05:15,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007341327] [2024-11-13 14:05:15,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:15,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:05:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:05:15,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:05:15,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007341327] [2024-11-13 14:05:15,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007341327] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:05:15,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:05:15,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:05:15,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185611751] [2024-11-13 14:05:15,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:05:15,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:05:15,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:05:15,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:05:15,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:05:15,364 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:05:15,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:05:15,523 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2024-11-13 14:05:15,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:05:15,524 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-13 14:05:15,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:05:15,524 INFO L225 Difference]: With dead ends: 98 [2024-11-13 14:05:15,524 INFO L226 Difference]: Without dead ends: 98 [2024-11-13 14:05:15,524 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-13 14:05:15,525 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 29 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 254 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 14:05:15,525 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 254 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:05:15,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-13 14:05:15,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2024-11-13 14:05:15,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 69 states have (on average 1.4927536231884058) internal successors, (103), 88 states have internal predecessors, (103), 0 states have call successors, (0), 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 14:05:15,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2024-11-13 14:05:15,530 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 12 [2024-11-13 14:05:15,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:05:15,531 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2024-11-13 14:05:15,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:05:15,531 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2024-11-13 14:05:15,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-13 14:05:15,531 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:05:15,531 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:05:15,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-13 14:05:15,532 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:05:15,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:05:15,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1720780579, now seen corresponding path program 1 times [2024-11-13 14:05:15,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:05:15,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885124169] [2024-11-13 14:05:15,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:15,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:05:15,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:05:15,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:05:15,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885124169] [2024-11-13 14:05:15,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885124169] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:05:15,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:05:15,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 14:05:15,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388891192] [2024-11-13 14:05:15,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:05:15,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 14:05:15,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:05:15,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 14:05:15,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:05:15,748 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:05:15,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:05:15,840 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2024-11-13 14:05:15,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:05:15,841 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-13 14:05:15,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:05:15,842 INFO L225 Difference]: With dead ends: 91 [2024-11-13 14:05:15,842 INFO L226 Difference]: Without dead ends: 91 [2024-11-13 14:05:15,842 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:05:15,843 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 16 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:05:15,843 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 223 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:05:15,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-13 14:05:15,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2024-11-13 14:05:15,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 58 states have (on average 1.5517241379310345) internal successors, (90), 76 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 14:05:15,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2024-11-13 14:05:15,847 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 12 [2024-11-13 14:05:15,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:05:15,847 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2024-11-13 14:05:15,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:05:15,848 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2024-11-13 14:05:15,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-13 14:05:15,848 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:05:15,848 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:05:15,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-13 14:05:15,849 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:05:15,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:05:15,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1213598513, now seen corresponding path program 1 times [2024-11-13 14:05:15,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:05:15,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512032692] [2024-11-13 14:05:15,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:15,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:05:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:15,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:05:15,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:05:15,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512032692] [2024-11-13 14:05:15,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512032692] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:05:15,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73451319] [2024-11-13 14:05:15,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:15,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:05:15,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:05:15,918 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:05:15,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 14:05:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:15,998 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 14:05:15,999 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:05:16,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:05:16,051 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:05:16,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73451319] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:05:16,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:05:16,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-11-13 14:05:16,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062089587] [2024-11-13 14:05:16,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:05:16,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:05:16,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:05:16,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:05:16,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:05:16,055 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand has 5 states, 5 states have (on average 3.0) 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 14:05:16,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:05:16,081 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2024-11-13 14:05:16,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:05:16,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) 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 14:05:16,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:05:16,082 INFO L225 Difference]: With dead ends: 96 [2024-11-13 14:05:16,082 INFO L226 Difference]: Without dead ends: 96 [2024-11-13 14:05:16,082 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:05:16,083 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 4 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:05:16,083 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 159 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:05:16,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-13 14:05:16,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2024-11-13 14:05:16,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 73 states have (on average 1.452054794520548) internal successors, (106), 91 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 14:05:16,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2024-11-13 14:05:16,090 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 15 [2024-11-13 14:05:16,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:05:16,090 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2024-11-13 14:05:16,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) 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 14:05:16,090 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2024-11-13 14:05:16,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-13 14:05:16,091 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:05:16,091 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:05:16,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-13 14:05:16,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:05:16,299 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:05:16,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:05:16,300 INFO L85 PathProgramCache]: Analyzing trace with hash -955433075, now seen corresponding path program 1 times [2024-11-13 14:05:16,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:05:16,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31236827] [2024-11-13 14:05:16,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:16,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:05:16,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:16,592 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 14:05:16,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:05:16,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31236827] [2024-11-13 14:05:16,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31236827] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:05:16,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634761293] [2024-11-13 14:05:16,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:16,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:05:16,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:05:16,595 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:05:16,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 14:05:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:16,671 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 14:05:16,673 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:05:16,723 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 7 [2024-11-13 14:05:16,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-13 14:05:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:05:17,003 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:05:17,375 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 14:05:17,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634761293] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:05:17,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:05:17,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2024-11-13 14:05:17,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225314793] [2024-11-13 14:05:17,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:05:17,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 14:05:17,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:05:17,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 14:05:17,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2024-11-13 14:05:17,377 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 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 14:05:17,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:05:17,657 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2024-11-13 14:05:17,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 14:05:17,658 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 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 14:05:17,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:05:17,658 INFO L225 Difference]: With dead ends: 92 [2024-11-13 14:05:17,658 INFO L226 Difference]: Without dead ends: 92 [2024-11-13 14:05:17,659 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2024-11-13 14:05:17,659 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 22 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:05:17,660 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 425 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 14:05:17,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-13 14:05:17,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2024-11-13 14:05:17,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 72 states have (on average 1.4444444444444444) internal successors, (104), 89 states have internal predecessors, (104), 0 states have call successors, (0), 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 14:05:17,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 104 transitions. [2024-11-13 14:05:17,664 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 104 transitions. Word has length 15 [2024-11-13 14:05:17,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:05:17,664 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 104 transitions. [2024-11-13 14:05:17,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 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 14:05:17,664 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 104 transitions. [2024-11-13 14:05:17,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-13 14:05:17,665 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:05:17,665 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:05:17,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-13 14:05:17,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-13 14:05:17,870 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:05:17,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:05:17,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1033150044, now seen corresponding path program 1 times [2024-11-13 14:05:17,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:05:17,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184284915] [2024-11-13 14:05:17,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:17,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:05:17,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:18,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:05:18,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:05:18,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184284915] [2024-11-13 14:05:18,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184284915] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:05:18,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859028703] [2024-11-13 14:05:18,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:18,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:05:18,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:05:18,043 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:05:18,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 14:05:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:18,115 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 14:05:18,117 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:05:18,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:05:18,224 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:05:18,295 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 18 [2024-11-13 14:05:18,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:05:18,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859028703] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:05:18,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:05:18,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-11-13 14:05:18,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160910570] [2024-11-13 14:05:18,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:05:18,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 14:05:18,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:05:18,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 14:05:18,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-13 14:05:18,342 INFO L87 Difference]: Start difference. First operand 90 states and 104 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:05:18,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:05:18,492 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2024-11-13 14:05:18,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:05:18,493 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-13 14:05:18,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:05:18,494 INFO L225 Difference]: With dead ends: 102 [2024-11-13 14:05:18,494 INFO L226 Difference]: Without dead ends: 102 [2024-11-13 14:05:18,494 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2024-11-13 14:05:18,495 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 6 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:05:18,495 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 317 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:05:18,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-13 14:05:18,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2024-11-13 14:05:18,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 84 states have (on average 1.3928571428571428) internal successors, (117), 101 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:05:18,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 117 transitions. [2024-11-13 14:05:18,499 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 117 transitions. Word has length 16 [2024-11-13 14:05:18,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:05:18,499 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 117 transitions. [2024-11-13 14:05:18,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:05:18,499 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 117 transitions. [2024-11-13 14:05:18,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-13 14:05:18,500 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:05:18,500 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:05:18,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 14:05:18,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-13 14:05:18,701 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:05:18,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:05:18,701 INFO L85 PathProgramCache]: Analyzing trace with hash 22032794, now seen corresponding path program 1 times [2024-11-13 14:05:18,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:05:18,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750347602] [2024-11-13 14:05:18,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:18,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:05:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:18,821 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 14:05:18,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:05:18,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750347602] [2024-11-13 14:05:18,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750347602] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:05:18,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:05:18,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 14:05:18,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607153611] [2024-11-13 14:05:18,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:05:18,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 14:05:18,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:05:18,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 14:05:18,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:05:18,823 INFO L87 Difference]: Start difference. First operand 102 states and 117 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 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 14:05:18,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:05:18,853 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2024-11-13 14:05:18,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:05:18,854 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-13 14:05:18,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:05:18,854 INFO L225 Difference]: With dead ends: 101 [2024-11-13 14:05:18,854 INFO L226 Difference]: Without dead ends: 101 [2024-11-13 14:05:18,855 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:05:18,855 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 2 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:05:18,855 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 202 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:05:18,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-13 14:05:18,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 89. [2024-11-13 14:05:18,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 72 states have (on average 1.4305555555555556) internal successors, (103), 88 states have internal predecessors, (103), 0 states have call successors, (0), 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 14:05:18,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2024-11-13 14:05:18,859 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 16 [2024-11-13 14:05:18,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:05:18,859 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2024-11-13 14:05:18,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 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 14:05:18,859 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2024-11-13 14:05:18,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-13 14:05:18,860 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:05:18,860 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 14:05:18,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-13 14:05:18,860 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:05:18,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:05:18,860 INFO L85 PathProgramCache]: Analyzing trace with hash 837308827, now seen corresponding path program 1 times [2024-11-13 14:05:18,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:05:18,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955713130] [2024-11-13 14:05:18,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:18,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:05:18,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:18,912 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 14:05:18,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:05:18,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955713130] [2024-11-13 14:05:18,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955713130] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:05:18,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:05:18,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 14:05:18,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792959631] [2024-11-13 14:05:18,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:05:18,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:05:18,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:05:18,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:05:18,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:05:18,914 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 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 14:05:18,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:05:18,966 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2024-11-13 14:05:18,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:05:18,967 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 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 14:05:18,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:05:18,968 INFO L225 Difference]: With dead ends: 88 [2024-11-13 14:05:18,968 INFO L226 Difference]: Without dead ends: 88 [2024-11-13 14:05:18,968 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 14:05:18,968 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 6 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:05:18,969 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 162 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:05:18,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-13 14:05:18,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-11-13 14:05:18,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 87 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 14:05:18,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 102 transitions. [2024-11-13 14:05:18,972 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 102 transitions. Word has length 19 [2024-11-13 14:05:18,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:05:18,972 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 102 transitions. [2024-11-13 14:05:18,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 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 14:05:18,972 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 102 transitions. [2024-11-13 14:05:18,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-13 14:05:18,972 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:05:18,972 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 14:05:18,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-13 14:05:18,973 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:05:18,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:05:18,973 INFO L85 PathProgramCache]: Analyzing trace with hash 837308828, now seen corresponding path program 1 times [2024-11-13 14:05:18,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:05:18,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132408492] [2024-11-13 14:05:18,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:18,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:05:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:19,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:05:19,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:05:19,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132408492] [2024-11-13 14:05:19,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132408492] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:05:19,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433173053] [2024-11-13 14:05:19,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:19,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:05:19,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:05:19,197 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:05:19,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 14:05:19,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:19,287 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 14:05:19,289 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:05:19,298 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 14:05:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:05:19,369 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:05:19,479 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 14:05:19,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433173053] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 14:05:19,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:05:19,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2024-11-13 14:05:19,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118337604] [2024-11-13 14:05:19,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:05:19,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:05:19,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:05:19,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:05:19,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-11-13 14:05:19,481 INFO L87 Difference]: Start difference. First operand 88 states and 102 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 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 14:05:19,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:05:19,571 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2024-11-13 14:05:19,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:05:19,572 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 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 14:05:19,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:05:19,572 INFO L225 Difference]: With dead ends: 88 [2024-11-13 14:05:19,572 INFO L226 Difference]: Without dead ends: 88 [2024-11-13 14:05:19,572 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2024-11-13 14:05:19,573 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 3 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:05:19,573 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 218 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:05:19,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-13 14:05:19,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2024-11-13 14:05:19,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 72 states have (on average 1.4027777777777777) internal successors, (101), 86 states have internal predecessors, (101), 0 states have call successors, (0), 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 14:05:19,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2024-11-13 14:05:19,576 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 19 [2024-11-13 14:05:19,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:05:19,576 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2024-11-13 14:05:19,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 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 14:05:19,577 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2024-11-13 14:05:19,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-13 14:05:19,577 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:05:19,577 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 14:05:19,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 14:05:19,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-13 14:05:19,782 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:05:19,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:05:19,782 INFO L85 PathProgramCache]: Analyzing trace with hash -902762107, now seen corresponding path program 1 times [2024-11-13 14:05:19,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:05:19,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297426765] [2024-11-13 14:05:19,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:19,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:05:19,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:19,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 14:05:19,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:05:19,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297426765] [2024-11-13 14:05:19,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297426765] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:05:19,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:05:19,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 14:05:19,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957723374] [2024-11-13 14:05:19,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:05:19,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:05:19,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:05:19,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:05:19,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:05:19,871 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 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 14:05:19,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:05:19,946 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2024-11-13 14:05:19,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:05:19,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 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 14:05:19,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:05:19,947 INFO L225 Difference]: With dead ends: 86 [2024-11-13 14:05:19,947 INFO L226 Difference]: Without dead ends: 86 [2024-11-13 14:05:19,948 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 14:05:19,948 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 54 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:05:19,948 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 167 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:05:19,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-13 14:05:19,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-11-13 14:05:19,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 72 states have (on average 1.3888888888888888) internal successors, (100), 85 states have internal predecessors, (100), 0 states have call successors, (0), 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 14:05:19,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 100 transitions. [2024-11-13 14:05:19,953 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 100 transitions. Word has length 22 [2024-11-13 14:05:19,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:05:19,954 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 100 transitions. [2024-11-13 14:05:19,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 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 14:05:19,954 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 100 transitions. [2024-11-13 14:05:19,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-13 14:05:19,954 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:05:19,954 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 14:05:19,955 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-13 14:05:19,955 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:05:19,956 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:05:19,956 INFO L85 PathProgramCache]: Analyzing trace with hash -902762106, now seen corresponding path program 1 times [2024-11-13 14:05:19,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:05:19,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101114793] [2024-11-13 14:05:19,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:19,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:05:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 14:05:20,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:05:20,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101114793] [2024-11-13 14:05:20,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101114793] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:05:20,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:05:20,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-13 14:05:20,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135451861] [2024-11-13 14:05:20,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:05:20,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 14:05:20,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:05:20,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 14:05:20,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-13 14:05:20,222 INFO L87 Difference]: Start difference. First operand 86 states and 100 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:05:20,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:05:20,289 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2024-11-13 14:05:20,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 14:05:20,290 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-13 14:05:20,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:05:20,290 INFO L225 Difference]: With dead ends: 93 [2024-11-13 14:05:20,290 INFO L226 Difference]: Without dead ends: 93 [2024-11-13 14:05:20,290 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-13 14:05:20,291 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 0 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:05:20,291 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 442 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:05:20,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-13 14:05:20,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2024-11-13 14:05:20,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 79 states have (on average 1.3544303797468353) internal successors, (107), 92 states have internal predecessors, (107), 0 states have call successors, (0), 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 14:05:20,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107 transitions. [2024-11-13 14:05:20,294 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 107 transitions. Word has length 22 [2024-11-13 14:05:20,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:05:20,294 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 107 transitions. [2024-11-13 14:05:20,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:05:20,294 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 107 transitions. [2024-11-13 14:05:20,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-13 14:05:20,295 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:05:20,295 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 14:05:20,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-13 14:05:20,295 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:05:20,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:05:20,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1703261448, now seen corresponding path program 1 times [2024-11-13 14:05:20,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:05:20,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089582335] [2024-11-13 14:05:20,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:20,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:05:20,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:20,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:05:20,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:05:20,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089582335] [2024-11-13 14:05:20,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089582335] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:05:20,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039909085] [2024-11-13 14:05:20,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:20,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:05:20,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:05:20,653 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:05:20,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 14:05:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:20,746 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-13 14:05:20,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:05:20,830 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 14:05:20,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:05:20,859 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:05:20,873 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 14:05:20,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-11-13 14:05:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:05:20,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039909085] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:05:20,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:05:20,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 18 [2024-11-13 14:05:20,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269374374] [2024-11-13 14:05:20,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:05:20,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 14:05:20,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:05:20,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 14:05:20,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-11-13 14:05:20,966 INFO L87 Difference]: Start difference. First operand 93 states and 107 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:05:21,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:05:21,172 INFO L93 Difference]: Finished difference Result 105 states and 120 transitions. [2024-11-13 14:05:21,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 14:05:21,173 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-13 14:05:21,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:05:21,174 INFO L225 Difference]: With dead ends: 105 [2024-11-13 14:05:21,174 INFO L226 Difference]: Without dead ends: 105 [2024-11-13 14:05:21,174 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2024-11-13 14:05:21,175 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 57 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:05:21,175 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 622 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:05:21,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-13 14:05:21,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 96. [2024-11-13 14:05:21,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 82 states have (on average 1.353658536585366) internal successors, (111), 95 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:05:21,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2024-11-13 14:05:21,179 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 22 [2024-11-13 14:05:21,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:05:21,179 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2024-11-13 14:05:21,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:05:21,180 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2024-11-13 14:05:21,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-13 14:05:21,180 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:05:21,180 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 14:05:21,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 14:05:21,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-13 14:05:21,384 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:05:21,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:05:21,385 INFO L85 PathProgramCache]: Analyzing trace with hash 32086564, now seen corresponding path program 1 times [2024-11-13 14:05:21,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:05:21,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625593547] [2024-11-13 14:05:21,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:21,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:05:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:21,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 14:05:21,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:05:21,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625593547] [2024-11-13 14:05:21,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625593547] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:05:21,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:05:21,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 14:05:21,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381183061] [2024-11-13 14:05:21,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:05:21,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:05:21,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:05:21,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:05:21,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:05:21,559 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 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 14:05:21,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:05:21,606 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2024-11-13 14:05:21,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:05:21,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 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 14:05:21,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:05:21,607 INFO L225 Difference]: With dead ends: 95 [2024-11-13 14:05:21,607 INFO L226 Difference]: Without dead ends: 69 [2024-11-13 14:05:21,608 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 14:05:21,608 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 51 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 106 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 14:05:21,608 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 106 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:05:21,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-13 14:05:21,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-11-13 14:05:21,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 68 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:05:21,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2024-11-13 14:05:21,614 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 24 [2024-11-13 14:05:21,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:05:21,614 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2024-11-13 14:05:21,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 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 14:05:21,614 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2024-11-13 14:05:21,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-13 14:05:21,615 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:05:21,615 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:05:21,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-13 14:05:21,615 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:05:21,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:05:21,615 INFO L85 PathProgramCache]: Analyzing trace with hash 147714290, now seen corresponding path program 2 times [2024-11-13 14:05:21,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:05:21,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006379287] [2024-11-13 14:05:21,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:21,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:05:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:21,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:05:21,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:05:21,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006379287] [2024-11-13 14:05:21,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006379287] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:05:21,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496243183] [2024-11-13 14:05:21,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:05:21,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:05:21,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:05:21,879 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:05:21,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 14:05:21,978 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 14:05:21,979 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:05:21,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-13 14:05:21,983 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:05:22,004 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 14:05:22,041 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 14:05:22,182 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:05:22,183 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 20 treesize of output 17 [2024-11-13 14:05:22,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 14:05:22,294 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:05:22,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496243183] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:05:22,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:05:22,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2024-11-13 14:05:22,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691337990] [2024-11-13 14:05:22,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:05:22,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 14:05:22,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:05:22,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 14:05:22,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-11-13 14:05:22,295 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:05:22,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:05:22,542 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2024-11-13 14:05:22,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 14:05:22,543 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-13 14:05:22,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:05:22,544 INFO L225 Difference]: With dead ends: 72 [2024-11-13 14:05:22,544 INFO L226 Difference]: Without dead ends: 72 [2024-11-13 14:05:22,544 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-11-13 14:05:22,544 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 101 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:05:22,545 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 200 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 14:05:22,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-13 14:05:22,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2024-11-13 14:05:22,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 57 states have (on average 1.3859649122807018) internal successors, (79), 69 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:05:22,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2024-11-13 14:05:22,547 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 25 [2024-11-13 14:05:22,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:05:22,547 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2024-11-13 14:05:22,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:05:22,548 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2024-11-13 14:05:22,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-13 14:05:22,548 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:05:22,548 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:05:22,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 14:05:22,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:05:22,753 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:05:22,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:05:22,753 INFO L85 PathProgramCache]: Analyzing trace with hash 219512299, now seen corresponding path program 1 times [2024-11-13 14:05:22,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:05:22,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436025988] [2024-11-13 14:05:22,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:22,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:05:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:05:23,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:05:23,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436025988] [2024-11-13 14:05:23,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436025988] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:05:23,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372934126] [2024-11-13 14:05:23,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:23,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:05:23,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:05:23,179 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:05:23,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 14:05:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:23,294 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-13 14:05:23,296 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:05:23,398 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 14:05:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:05:23,494 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:05:23,520 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 14:05:23,524 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 14:05:23,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:05:23,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372934126] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:05:23,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:05:23,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 24 [2024-11-13 14:05:23,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280377629] [2024-11-13 14:05:23,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:05:23,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-13 14:05:23,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:05:23,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-13 14:05:23,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2024-11-13 14:05:23,617 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:05:24,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:05:24,030 INFO L93 Difference]: Finished difference Result 120 states and 135 transitions. [2024-11-13 14:05:24,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 14:05:24,030 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-13 14:05:24,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:05:24,031 INFO L225 Difference]: With dead ends: 120 [2024-11-13 14:05:24,032 INFO L226 Difference]: Without dead ends: 120 [2024-11-13 14:05:24,032 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2024-11-13 14:05:24,033 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 106 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:05:24,033 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 797 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 14:05:24,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-13 14:05:24,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 82. [2024-11-13 14:05:24,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 81 states have internal predecessors, (92), 0 states have call successors, (0), 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 14:05:24,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2024-11-13 14:05:24,039 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 27 [2024-11-13 14:05:24,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:05:24,039 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2024-11-13 14:05:24,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:05:24,039 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2024-11-13 14:05:24,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-13 14:05:24,041 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:05:24,041 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:05:24,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 14:05:24,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:05:24,241 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:05:24,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:05:24,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1946690625, now seen corresponding path program 2 times [2024-11-13 14:05:24,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:05:24,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264877004] [2024-11-13 14:05:24,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:24,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:05:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:24,659 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:05:24,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:05:24,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264877004] [2024-11-13 14:05:24,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264877004] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:05:24,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999027982] [2024-11-13 14:05:24,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:05:24,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:05:24,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:05:24,662 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:05:24,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 14:05:24,776 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:05:24,776 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:05:24,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-13 14:05:24,780 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:05:24,790 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 14:05:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:05:24,966 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:05:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:05:25,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999027982] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:05:25,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:05:25,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2024-11-13 14:05:25,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108176750] [2024-11-13 14:05:25,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:05:25,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-13 14:05:25,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:05:25,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-13 14:05:25,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2024-11-13 14:05:25,370 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand has 27 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:05:26,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:05:26,050 INFO L93 Difference]: Finished difference Result 124 states and 141 transitions. [2024-11-13 14:05:26,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 14:05:26,050 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-13 14:05:26,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:05:26,051 INFO L225 Difference]: With dead ends: 124 [2024-11-13 14:05:26,051 INFO L226 Difference]: Without dead ends: 124 [2024-11-13 14:05:26,052 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2024-11-13 14:05:26,052 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 70 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 14:05:26,053 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 957 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 14:05:26,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-11-13 14:05:26,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 84. [2024-11-13 14:05:26,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 83 states have internal predecessors, (95), 0 states have call successors, (0), 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 14:05:26,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2024-11-13 14:05:26,056 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 30 [2024-11-13 14:05:26,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:05:26,056 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2024-11-13 14:05:26,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:05:26,056 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2024-11-13 14:05:26,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-13 14:05:26,057 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:05:26,057 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:05:26,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 14:05:26,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:05:26,257 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:05:26,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:05:26,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1714972188, now seen corresponding path program 1 times [2024-11-13 14:05:26,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:05:26,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711467519] [2024-11-13 14:05:26,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:26,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:05:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:26,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:05:26,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:05:26,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711467519] [2024-11-13 14:05:26,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711467519] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:05:26,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:05:26,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 14:05:26,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721789486] [2024-11-13 14:05:26,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:05:26,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:05:26,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:05:26,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:05:26,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:05:26,334 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 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 14:05:26,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:05:26,402 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2024-11-13 14:05:26,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:05:26,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 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 31 [2024-11-13 14:05:26,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:05:26,403 INFO L225 Difference]: With dead ends: 83 [2024-11-13 14:05:26,404 INFO L226 Difference]: Without dead ends: 83 [2024-11-13 14:05:26,404 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 14:05:26,406 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 39 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:05:26,406 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 131 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:05:26,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-13 14:05:26,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2024-11-13 14:05:26,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 71 states have (on average 1.323943661971831) internal successors, (94), 82 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 14:05:26,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2024-11-13 14:05:26,412 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 31 [2024-11-13 14:05:26,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:05:26,413 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2024-11-13 14:05:26,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 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 14:05:26,413 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2024-11-13 14:05:26,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-13 14:05:26,413 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:05:26,414 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:05:26,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-13 14:05:26,415 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:05:26,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:05:26,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1714972189, now seen corresponding path program 1 times [2024-11-13 14:05:26,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:05:26,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815225924] [2024-11-13 14:05:26,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:26,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:05:26,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:26,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:05:26,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:05:26,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815225924] [2024-11-13 14:05:26,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815225924] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:05:26,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794235375] [2024-11-13 14:05:26,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:26,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:05:26,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:05:26,592 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:05:26,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 14:05:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:26,707 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 14:05:26,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:05:26,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:05:26,855 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:05:26,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-13 14:05:26,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:05:26,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794235375] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:05:26,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:05:26,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-11-13 14:05:26,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564732018] [2024-11-13 14:05:26,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:05:26,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 14:05:26,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:05:26,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 14:05:26,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-13 14:05:26,971 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 11 states, 10 states have (on average 5.2) internal successors, (52), 11 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 14:05:27,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:05:27,085 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2024-11-13 14:05:27,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 14:05:27,086 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.2) internal successors, (52), 11 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) Word has length 31 [2024-11-13 14:05:27,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:05:27,087 INFO L225 Difference]: With dead ends: 88 [2024-11-13 14:05:27,087 INFO L226 Difference]: Without dead ends: 88 [2024-11-13 14:05:27,087 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-11-13 14:05:27,087 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 9 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:05:27,088 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 212 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:05:27,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-13 14:05:27,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2024-11-13 14:05:27,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 85 states have internal predecessors, (97), 0 states have call successors, (0), 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 14:05:27,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 97 transitions. [2024-11-13 14:05:27,093 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 97 transitions. Word has length 31 [2024-11-13 14:05:27,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:05:27,093 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 97 transitions. [2024-11-13 14:05:27,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.2) internal successors, (52), 11 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 14:05:27,093 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 97 transitions. [2024-11-13 14:05:27,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-13 14:05:27,094 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:05:27,094 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:05:27,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 14:05:27,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:05:27,295 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:05:27,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:05:27,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1836050054, now seen corresponding path program 3 times [2024-11-13 14:05:27,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:05:27,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769088948] [2024-11-13 14:05:27,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:27,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:05:27,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:27,777 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:05:27,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:05:27,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769088948] [2024-11-13 14:05:27,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769088948] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:05:27,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733839109] [2024-11-13 14:05:27,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:05:27,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:05:27,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:05:27,780 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:05:27,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 14:05:27,900 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 14:05:27,901 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:05:27,903 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-13 14:05:27,905 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:05:27,932 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 14:05:28,012 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 14:05:28,951 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-11-13 14:05:28,951 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 31 [2024-11-13 14:05:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 1 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 14:05:29,056 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:05:29,636 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 14:05:29,645 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 44 treesize of output 34 [2024-11-13 14:05:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 14:05:30,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733839109] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:05:30,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:05:30,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 36 [2024-11-13 14:05:30,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7707660] [2024-11-13 14:05:30,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:05:30,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-13 14:05:30,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:05:30,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-13 14:05:30,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1141, Unknown=1, NotChecked=0, Total=1260 [2024-11-13 14:05:30,064 INFO L87 Difference]: Start difference. First operand 86 states and 97 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:05:38,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 14:05:42,396 WARN L539 Checker$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 14:05:48,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:05:48,811 INFO L93 Difference]: Finished difference Result 148 states and 169 transitions. [2024-11-13 14:05:48,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-13 14:05:48,812 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-13 14:05:48,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:05:48,813 INFO L225 Difference]: With dead ends: 148 [2024-11-13 14:05:48,813 INFO L226 Difference]: Without dead ends: 148 [2024-11-13 14:05:48,814 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=444, Invalid=3457, Unknown=5, NotChecked=0, Total=3906 [2024-11-13 14:05:48,815 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 327 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 10 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2024-11-13 14:05:48,815 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 1109 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1340 Invalid, 4 Unknown, 0 Unchecked, 10.4s Time] [2024-11-13 14:05:48,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-11-13 14:05:48,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 102. [2024-11-13 14:05:48,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 90 states have (on average 1.3) internal successors, (117), 101 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:05:48,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 117 transitions. [2024-11-13 14:05:48,829 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 117 transitions. Word has length 32 [2024-11-13 14:05:48,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:05:48,829 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 117 transitions. [2024-11-13 14:05:48,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:05:48,829 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 117 transitions. [2024-11-13 14:05:48,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-13 14:05:48,829 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:05:48,829 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, 1, 1, 1, 1] [2024-11-13 14:05:48,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-13 14:05:49,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-13 14:05:49,030 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:05:49,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:05:49,031 INFO L85 PathProgramCache]: Analyzing trace with hash -29583418, now seen corresponding path program 1 times [2024-11-13 14:05:49,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:05:49,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116699346] [2024-11-13 14:05:49,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:49,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:05:49,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:49,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:05:49,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:05:49,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116699346] [2024-11-13 14:05:49,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116699346] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:05:49,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596996820] [2024-11-13 14:05:49,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:49,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:05:49,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:05:49,305 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:05:49,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 14:05:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:49,433 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-13 14:05:49,437 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:05:49,479 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 14:05:49,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 14:05:49,523 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:05:49,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596996820] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:05:49,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:05:49,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 11 [2024-11-13 14:05:49,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019975237] [2024-11-13 14:05:49,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:05:49,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 14:05:49,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:05:49,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 14:05:49,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-13 14:05:49,525 INFO L87 Difference]: Start difference. First operand 102 states and 117 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 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 14:05:49,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:05:49,614 INFO L93 Difference]: Finished difference Result 158 states and 180 transitions. [2024-11-13 14:05:49,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 14:05:49,616 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 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 14:05:49,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:05:49,617 INFO L225 Difference]: With dead ends: 158 [2024-11-13 14:05:49,617 INFO L226 Difference]: Without dead ends: 133 [2024-11-13 14:05:49,617 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-13 14:05:49,618 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 2 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:05:49,618 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 383 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:05:49,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-11-13 14:05:49,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2024-11-13 14:05:49,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 120 states have (on average 1.2416666666666667) internal successors, (149), 131 states have internal predecessors, (149), 0 states have call successors, (0), 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 14:05:49,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 149 transitions. [2024-11-13 14:05:49,625 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 149 transitions. Word has length 36 [2024-11-13 14:05:49,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:05:49,625 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 149 transitions. [2024-11-13 14:05:49,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 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 14:05:49,625 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 149 transitions. [2024-11-13 14:05:49,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-13 14:05:49,626 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:05:49,626 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, 1, 1, 1, 1] [2024-11-13 14:05:49,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 14:05:49,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:05:49,827 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:05:49,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:05:49,827 INFO L85 PathProgramCache]: Analyzing trace with hash 2021400580, now seen corresponding path program 1 times [2024-11-13 14:05:49,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:05:49,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969506936] [2024-11-13 14:05:49,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:49,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:05:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:50,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:05:50,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:05:50,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969506936] [2024-11-13 14:05:50,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969506936] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:05:50,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246801693] [2024-11-13 14:05:50,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:50,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:05:50,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:05:50,103 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:05:50,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 14:05:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:50,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 14:05:50,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:05:50,313 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 14:05:50,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:05:50,358 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:05:50,394 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 14:05:50,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-11-13 14:05:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:05:50,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246801693] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:05:50,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:05:50,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-13 14:05:50,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413754780] [2024-11-13 14:05:50,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:05:50,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 14:05:50,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:05:50,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 14:05:50,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-11-13 14:05:50,497 INFO L87 Difference]: Start difference. First operand 132 states and 149 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 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 14:05:50,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:05:50,693 INFO L93 Difference]: Finished difference Result 193 states and 218 transitions. [2024-11-13 14:05:50,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 14:05:50,694 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 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) Word has length 36 [2024-11-13 14:05:50,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:05:50,694 INFO L225 Difference]: With dead ends: 193 [2024-11-13 14:05:50,694 INFO L226 Difference]: Without dead ends: 168 [2024-11-13 14:05:50,695 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2024-11-13 14:05:50,695 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 26 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:05:50,696 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 626 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:05:50,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-13 14:05:50,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 135. [2024-11-13 14:05:50,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 123 states have (on average 1.2439024390243902) internal successors, (153), 134 states have internal predecessors, (153), 0 states have call successors, (0), 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 14:05:50,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 153 transitions. [2024-11-13 14:05:50,704 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 153 transitions. Word has length 36 [2024-11-13 14:05:50,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:05:50,704 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 153 transitions. [2024-11-13 14:05:50,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 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 14:05:50,704 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 153 transitions. [2024-11-13 14:05:50,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-13 14:05:50,705 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:05:50,705 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:05:50,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 14:05:50,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:05:50,912 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:05:50,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:05:50,912 INFO L85 PathProgramCache]: Analyzing trace with hash 720138134, now seen corresponding path program 4 times [2024-11-13 14:05:50,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:05:50,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470883512] [2024-11-13 14:05:50,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:50,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:05:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:05:51,977 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:05:51,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:05:51,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470883512] [2024-11-13 14:05:51,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470883512] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:05:51,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686205528] [2024-11-13 14:05:51,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:05:51,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:05:51,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:05:51,980 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:05:51,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 14:05:52,105 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:05:52,105 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:05:52,107 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-13 14:05:52,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:05:52,393 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 14:05:54,835 INFO L349 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2024-11-13 14:05:54,835 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 14:05:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 24 refuted. 3 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 14:05:54,878 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:05:55,454 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 14:05:55,460 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:05:55,461 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 14:05:55,897 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 14:05:55,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686205528] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:05:55,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:05:55,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 50 [2024-11-13 14:05:55,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210982659] [2024-11-13 14:05:55,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:05:55,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-13 14:05:55,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:05:55,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-13 14:05:55,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2272, Unknown=4, NotChecked=0, Total=2450 [2024-11-13 14:05:55,899 INFO L87 Difference]: Start difference. First operand 135 states and 153 transitions. Second operand has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 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 14:05:59,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:05:59,598 INFO L93 Difference]: Finished difference Result 213 states and 239 transitions. [2024-11-13 14:05:59,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-13 14:05:59,599 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-13 14:05:59,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:05:59,600 INFO L225 Difference]: With dead ends: 213 [2024-11-13 14:05:59,600 INFO L226 Difference]: Without dead ends: 200 [2024-11-13 14:05:59,601 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=445, Invalid=4521, Unknown=4, NotChecked=0, Total=4970 [2024-11-13 14:05:59,602 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 255 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-13 14:05:59,602 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 1098 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1162 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-13 14:05:59,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2024-11-13 14:05:59,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 150. [2024-11-13 14:05:59,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 138 states have (on average 1.2318840579710144) internal successors, (170), 149 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 14:05:59,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 170 transitions. [2024-11-13 14:05:59,607 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 170 transitions. Word has length 39 [2024-11-13 14:05:59,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:05:59,608 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 170 transitions. [2024-11-13 14:05:59,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 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 14:05:59,608 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 170 transitions. [2024-11-13 14:05:59,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-13 14:05:59,609 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:05:59,609 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:05:59,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 14:05:59,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:05:59,813 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:05:59,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:05:59,813 INFO L85 PathProgramCache]: Analyzing trace with hash -991285962, now seen corresponding path program 2 times [2024-11-13 14:05:59,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:05:59,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477581582] [2024-11-13 14:05:59,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:05:59,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:05:59,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:00,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:06:00,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:06:00,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477581582] [2024-11-13 14:06:00,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477581582] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:06:00,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155930107] [2024-11-13 14:06:00,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:06:00,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:06:00,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:06:00,097 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:06:00,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 14:06:00,224 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:06:00,224 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:06:00,225 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 14:06:00,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:06:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:06:00,405 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:06:00,626 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 14:06:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:06:00,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155930107] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:06:00,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:06:00,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2024-11-13 14:06:00,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506053808] [2024-11-13 14:06:00,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:06:00,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-13 14:06:00,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:06:00,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-13 14:06:00,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-11-13 14:06:00,702 INFO L87 Difference]: Start difference. First operand 150 states and 170 transitions. Second operand has 20 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 20 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:06:01,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:06:01,164 INFO L93 Difference]: Finished difference Result 184 states and 208 transitions. [2024-11-13 14:06:01,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 14:06:01,165 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 20 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-13 14:06:01,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:06:01,166 INFO L225 Difference]: With dead ends: 184 [2024-11-13 14:06:01,166 INFO L226 Difference]: Without dead ends: 184 [2024-11-13 14:06:01,166 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2024-11-13 14:06:01,166 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 38 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 14:06:01,167 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 547 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 14:06:01,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-11-13 14:06:01,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 172. [2024-11-13 14:06:01,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 160 states have (on average 1.29375) internal successors, (207), 171 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 14:06:01,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 207 transitions. [2024-11-13 14:06:01,172 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 207 transitions. Word has length 39 [2024-11-13 14:06:01,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:06:01,172 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 207 transitions. [2024-11-13 14:06:01,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 20 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:06:01,172 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 207 transitions. [2024-11-13 14:06:01,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 14:06:01,173 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:06:01,173 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, 1, 1, 1, 1] [2024-11-13 14:06:01,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-13 14:06:01,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:06:01,374 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:06:01,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:06:01,374 INFO L85 PathProgramCache]: Analyzing trace with hash -665135301, now seen corresponding path program 1 times [2024-11-13 14:06:01,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:06:01,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003352499] [2024-11-13 14:06:01,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:06:01,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:06:01,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:01,478 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 14:06:01,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:06:01,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003352499] [2024-11-13 14:06:01,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003352499] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:06:01,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:06:01,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 14:06:01,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766939932] [2024-11-13 14:06:01,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:06:01,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:06:01,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:06:01,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:06:01,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:06:01,480 INFO L87 Difference]: Start difference. First operand 172 states and 207 transitions. Second operand has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:06:01,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:06:01,553 INFO L93 Difference]: Finished difference Result 172 states and 205 transitions. [2024-11-13 14:06:01,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:06:01,553 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-13 14:06:01,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:06:01,554 INFO L225 Difference]: With dead ends: 172 [2024-11-13 14:06:01,554 INFO L226 Difference]: Without dead ends: 172 [2024-11-13 14:06:01,554 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 14:06:01,555 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 48 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:06:01,555 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 114 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:06:01,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-11-13 14:06:01,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2024-11-13 14:06:01,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 160 states have (on average 1.26875) internal successors, (203), 169 states have internal predecessors, (203), 0 states have call successors, (0), 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 14:06:01,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 203 transitions. [2024-11-13 14:06:01,564 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 203 transitions. Word has length 40 [2024-11-13 14:06:01,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:06:01,565 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 203 transitions. [2024-11-13 14:06:01,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:06:01,565 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 203 transitions. [2024-11-13 14:06:01,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 14:06:01,566 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:06:01,566 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, 1, 1, 1, 1] [2024-11-13 14:06:01,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-11-13 14:06:01,566 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:06:01,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:06:01,566 INFO L85 PathProgramCache]: Analyzing trace with hash -665135300, now seen corresponding path program 1 times [2024-11-13 14:06:01,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:06:01,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801358032] [2024-11-13 14:06:01,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:06:01,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:06:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:06:01,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:06:01,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801358032] [2024-11-13 14:06:01,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801358032] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:06:01,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445885187] [2024-11-13 14:06:01,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:06:01,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:06:01,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:06:01,845 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:06:01,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 14:06:01,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:01,982 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-13 14:06:01,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:06:02,151 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:06:02,152 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:06:02,417 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 14:06:02,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:06:02,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445885187] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:06:02,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:06:02,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-13 14:06:02,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493346317] [2024-11-13 14:06:02,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:06:02,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 14:06:02,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:06:02,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 14:06:02,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-11-13 14:06:02,449 INFO L87 Difference]: Start difference. First operand 170 states and 203 transitions. Second operand has 19 states, 18 states have (on average 5.111111111111111) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 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 14:06:02,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:06:02,784 INFO L93 Difference]: Finished difference Result 186 states and 211 transitions. [2024-11-13 14:06:02,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 14:06:02,785 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.111111111111111) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-13 14:06:02,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:06:02,785 INFO L225 Difference]: With dead ends: 186 [2024-11-13 14:06:02,785 INFO L226 Difference]: Without dead ends: 186 [2024-11-13 14:06:02,786 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-11-13 14:06:02,786 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 56 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 14:06:02,786 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 452 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 14:06:02,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-11-13 14:06:02,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 170. [2024-11-13 14:06:02,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 161 states have (on average 1.2546583850931676) internal successors, (202), 169 states have internal predecessors, (202), 0 states have call successors, (0), 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 14:06:02,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 202 transitions. [2024-11-13 14:06:02,790 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 202 transitions. Word has length 40 [2024-11-13 14:06:02,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:06:02,790 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 202 transitions. [2024-11-13 14:06:02,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.111111111111111) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 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 14:06:02,791 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 202 transitions. [2024-11-13 14:06:02,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-13 14:06:02,791 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:06:02,791 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:06:02,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-13 14:06:02,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:06:02,992 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:06:02,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:06:02,992 INFO L85 PathProgramCache]: Analyzing trace with hash -853916436, now seen corresponding path program 5 times [2024-11-13 14:06:02,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:06:02,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036748239] [2024-11-13 14:06:02,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:06:02,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:06:03,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:03,648 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:06:03,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:06:03,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036748239] [2024-11-13 14:06:03,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036748239] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:06:03,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802145882] [2024-11-13 14:06:03,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 14:06:03,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:06:03,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:06:03,651 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:06:03,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 14:06:03,806 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-13 14:06:03,806 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:06:03,808 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-13 14:06:03,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:06:03,982 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 14:06:04,036 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:06:04,037 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:06:04,068 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 14:06:04,070 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 14:06:04,180 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:06:04,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802145882] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:06:04,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:06:04,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 30 [2024-11-13 14:06:04,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248540490] [2024-11-13 14:06:04,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:06:04,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-13 14:06:04,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:06:04,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-13 14:06:04,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2024-11-13 14:06:04,182 INFO L87 Difference]: Start difference. First operand 170 states and 202 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 14:06:04,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:06:04,951 INFO L93 Difference]: Finished difference Result 271 states and 324 transitions. [2024-11-13 14:06:04,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-13 14:06:04,952 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 42 [2024-11-13 14:06:04,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:06:04,953 INFO L225 Difference]: With dead ends: 271 [2024-11-13 14:06:04,953 INFO L226 Difference]: Without dead ends: 256 [2024-11-13 14:06:04,954 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=164, Invalid=1558, Unknown=0, NotChecked=0, Total=1722 [2024-11-13 14:06:04,954 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 79 mSDsluCounter, 1718 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1814 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 14:06:04,954 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 1814 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 14:06:04,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-11-13 14:06:04,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 185. [2024-11-13 14:06:04,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 176 states have (on average 1.2443181818181819) internal successors, (219), 184 states have internal predecessors, (219), 0 states have call successors, (0), 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 14:06:04,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 219 transitions. [2024-11-13 14:06:04,960 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 219 transitions. Word has length 42 [2024-11-13 14:06:04,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:06:04,960 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 219 transitions. [2024-11-13 14:06:04,961 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 14:06:04,961 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 219 transitions. [2024-11-13 14:06:04,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-13 14:06:04,961 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:06:04,961 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, 1, 1, 1, 1, 1, 1] [2024-11-13 14:06:04,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-13 14:06:05,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:06:05,166 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:06:05,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:06:05,166 INFO L85 PathProgramCache]: Analyzing trace with hash 755105564, now seen corresponding path program 1 times [2024-11-13 14:06:05,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:06:05,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417792235] [2024-11-13 14:06:05,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:06:05,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:06:05,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:05,261 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 14:06:05,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:06:05,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417792235] [2024-11-13 14:06:05,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417792235] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:06:05,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:06:05,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:06:05,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031257659] [2024-11-13 14:06:05,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:06:05,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:06:05,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:06:05,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:06:05,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:06:05,264 INFO L87 Difference]: Start difference. First operand 185 states and 219 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 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 14:06:05,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:06:05,361 INFO L93 Difference]: Finished difference Result 186 states and 219 transitions. [2024-11-13 14:06:05,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:06:05,362 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 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 14:06:05,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:06:05,363 INFO L225 Difference]: With dead ends: 186 [2024-11-13 14:06:05,363 INFO L226 Difference]: Without dead ends: 186 [2024-11-13 14:06:05,363 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-13 14:06:05,363 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 51 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:06:05,364 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 147 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:06:05,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-11-13 14:06:05,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2024-11-13 14:06:05,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 176 states have (on average 1.2329545454545454) internal successors, (217), 183 states have internal predecessors, (217), 0 states have call successors, (0), 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 14:06:05,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 217 transitions. [2024-11-13 14:06:05,373 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 217 transitions. Word has length 42 [2024-11-13 14:06:05,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:06:05,373 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 217 transitions. [2024-11-13 14:06:05,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 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 14:06:05,373 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 217 transitions. [2024-11-13 14:06:05,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-13 14:06:05,373 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:06:05,374 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, 1, 1, 1, 1, 1, 1] [2024-11-13 14:06:05,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-11-13 14:06:05,374 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:06:05,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:06:05,374 INFO L85 PathProgramCache]: Analyzing trace with hash 755105565, now seen corresponding path program 1 times [2024-11-13 14:06:05,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:06:05,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505431156] [2024-11-13 14:06:05,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:06:05,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:06:05,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:05,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:06:05,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:06:05,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505431156] [2024-11-13 14:06:05,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505431156] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:06:05,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065813990] [2024-11-13 14:06:05,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:06:05,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:06:05,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:06:05,748 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:06:05,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 14:06:05,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:05,879 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-13 14:06:05,881 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:06:05,885 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 14:06:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:06:06,031 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:06:06,336 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:06:06,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065813990] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:06:06,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:06:06,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 22 [2024-11-13 14:06:06,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937580001] [2024-11-13 14:06:06,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:06:06,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 14:06:06,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:06:06,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 14:06:06,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2024-11-13 14:06:06,337 INFO L87 Difference]: Start difference. First operand 184 states and 217 transitions. Second operand has 23 states, 22 states have (on average 4.136363636363637) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:06:06,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:06:06,745 INFO L93 Difference]: Finished difference Result 192 states and 225 transitions. [2024-11-13 14:06:06,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 14:06:06,746 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.136363636363637) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-11-13 14:06:06,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:06:06,747 INFO L225 Difference]: With dead ends: 192 [2024-11-13 14:06:06,747 INFO L226 Difference]: Without dead ends: 192 [2024-11-13 14:06:06,747 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2024-11-13 14:06:06,747 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 45 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 14:06:06,748 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 410 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 14:06:06,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-13 14:06:06,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2024-11-13 14:06:06,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 181 states have (on average 1.2320441988950277) internal successors, (223), 188 states have internal predecessors, (223), 0 states have call successors, (0), 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 14:06:06,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 223 transitions. [2024-11-13 14:06:06,754 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 223 transitions. Word has length 42 [2024-11-13 14:06:06,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:06:06,754 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 223 transitions. [2024-11-13 14:06:06,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.136363636363637) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:06:06,754 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 223 transitions. [2024-11-13 14:06:06,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 14:06:06,758 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:06:06,758 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:06:06,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-13 14:06:06,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-13 14:06:06,960 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:06:06,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:06:06,960 INFO L85 PathProgramCache]: Analyzing trace with hash -193022787, now seen corresponding path program 1 times [2024-11-13 14:06:06,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:06:06,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778393362] [2024-11-13 14:06:06,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:06:06,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:06:06,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:07,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 14:06:07,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:06:07,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778393362] [2024-11-13 14:06:07,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778393362] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:06:07,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:06:07,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:06:07,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515667218] [2024-11-13 14:06:07,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:06:07,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:06:07,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:06:07,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:06:07,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:06:07,063 INFO L87 Difference]: Start difference. First operand 189 states and 223 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:06:07,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:06:07,159 INFO L93 Difference]: Finished difference Result 190 states and 223 transitions. [2024-11-13 14:06:07,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:06:07,159 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-11-13 14:06:07,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:06:07,160 INFO L225 Difference]: With dead ends: 190 [2024-11-13 14:06:07,160 INFO L226 Difference]: Without dead ends: 190 [2024-11-13 14:06:07,160 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-13 14:06:07,161 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 40 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:06:07,161 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 148 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:06:07,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-11-13 14:06:07,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2024-11-13 14:06:07,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 181 states have (on average 1.2209944751381216) internal successors, (221), 187 states have internal predecessors, (221), 0 states have call successors, (0), 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 14:06:07,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 221 transitions. [2024-11-13 14:06:07,165 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 221 transitions. Word has length 44 [2024-11-13 14:06:07,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:06:07,166 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 221 transitions. [2024-11-13 14:06:07,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:06:07,166 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 221 transitions. [2024-11-13 14:06:07,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 14:06:07,166 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:06:07,167 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:06:07,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-11-13 14:06:07,167 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:06:07,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:06:07,167 INFO L85 PathProgramCache]: Analyzing trace with hash -193022786, now seen corresponding path program 1 times [2024-11-13 14:06:07,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:06:07,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302210305] [2024-11-13 14:06:07,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:06:07,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:06:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:07,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:06:07,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:06:07,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302210305] [2024-11-13 14:06:07,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302210305] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:06:07,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021355186] [2024-11-13 14:06:07,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:06:07,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:06:07,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:06:07,450 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:06:07,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-13 14:06:07,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:07,604 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-13 14:06:07,617 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:06:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:06:07,797 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:06:08,042 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 14:06:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:06:08,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021355186] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:06:08,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:06:08,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-11-13 14:06:08,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446372849] [2024-11-13 14:06:08,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:06:08,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 14:06:08,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:06:08,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 14:06:08,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2024-11-13 14:06:08,070 INFO L87 Difference]: Start difference. First operand 188 states and 221 transitions. Second operand has 21 states, 20 states have (on average 5.0) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 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 14:06:08,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:06:08,475 INFO L93 Difference]: Finished difference Result 197 states and 225 transitions. [2024-11-13 14:06:08,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 14:06:08,476 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.0) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 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 14:06:08,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:06:08,476 INFO L225 Difference]: With dead ends: 197 [2024-11-13 14:06:08,477 INFO L226 Difference]: Without dead ends: 197 [2024-11-13 14:06:08,477 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2024-11-13 14:06:08,477 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 82 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 14:06:08,477 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 548 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 14:06:08,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-13 14:06:08,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 187. [2024-11-13 14:06:08,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 181 states have (on average 1.2099447513812154) internal successors, (219), 186 states have internal predecessors, (219), 0 states have call successors, (0), 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 14:06:08,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 219 transitions. [2024-11-13 14:06:08,482 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 219 transitions. Word has length 44 [2024-11-13 14:06:08,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:06:08,483 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 219 transitions. [2024-11-13 14:06:08,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 5.0) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 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 14:06:08,483 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 219 transitions. [2024-11-13 14:06:08,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 14:06:08,484 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:06:08,484 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2024-11-13 14:06:08,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-13 14:06:08,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-13 14:06:08,688 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:06:08,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:06:08,688 INFO L85 PathProgramCache]: Analyzing trace with hash -449292211, now seen corresponding path program 3 times [2024-11-13 14:06:08,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:06:08,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568290890] [2024-11-13 14:06:08,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:06:08,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:06:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:09,214 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:06:09,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:06:09,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568290890] [2024-11-13 14:06:09,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568290890] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:06:09,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013059753] [2024-11-13 14:06:09,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:06:09,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:06:09,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:06:09,217 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:06:09,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-13 14:06:09,384 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 14:06:09,384 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:06:09,386 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-13 14:06:09,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:06:09,498 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 14:06:09,569 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:06:09,570 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:06:09,608 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 14:06:09,610 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 14:06:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:06:09,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013059753] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:06:09,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:06:09,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 23 [2024-11-13 14:06:09,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422038323] [2024-11-13 14:06:09,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:06:09,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 14:06:09,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:06:09,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 14:06:09,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2024-11-13 14:06:09,683 INFO L87 Difference]: Start difference. First operand 187 states and 219 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 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 14:06:09,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:06:09,992 INFO L93 Difference]: Finished difference Result 301 states and 350 transitions. [2024-11-13 14:06:09,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 14:06:09,993 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 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 44 [2024-11-13 14:06:09,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:06:09,994 INFO L225 Difference]: With dead ends: 301 [2024-11-13 14:06:09,994 INFO L226 Difference]: Without dead ends: 292 [2024-11-13 14:06:09,995 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2024-11-13 14:06:09,995 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 34 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:06:09,995 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1005 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 14:06:09,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2024-11-13 14:06:10,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 285. [2024-11-13 14:06:10,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 279 states have (on average 1.200716845878136) internal successors, (335), 284 states have internal predecessors, (335), 0 states have call successors, (0), 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 14:06:10,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 335 transitions. [2024-11-13 14:06:10,002 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 335 transitions. Word has length 44 [2024-11-13 14:06:10,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:06:10,002 INFO L471 AbstractCegarLoop]: Abstraction has 285 states and 335 transitions. [2024-11-13 14:06:10,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 23 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 14:06:10,002 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 335 transitions. [2024-11-13 14:06:10,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-13 14:06:10,003 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:06:10,003 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:06:10,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-13 14:06:10,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-13 14:06:10,203 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:06:10,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:06:10,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1060673578, now seen corresponding path program 6 times [2024-11-13 14:06:10,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:06:10,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942531442] [2024-11-13 14:06:10,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:06:10,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:06:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:06:10,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:06:10,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942531442] [2024-11-13 14:06:10,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942531442] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:06:10,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474246637] [2024-11-13 14:06:10,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 14:06:10,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:06:10,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:06:10,658 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:06:10,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-13 14:06:10,838 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-13 14:06:10,838 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:06:10,840 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-13 14:06:10,842 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:06:11,085 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 40 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:06:11,085 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:06:11,377 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 14:06:11,451 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 40 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:06:11,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474246637] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:06:11,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:06:11,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2024-11-13 14:06:11,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509621369] [2024-11-13 14:06:11,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:06:11,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-13 14:06:11,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:06:11,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-13 14:06:11,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2024-11-13 14:06:11,453 INFO L87 Difference]: Start difference. First operand 285 states and 335 transitions. Second operand has 32 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:06:12,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:06:12,262 INFO L93 Difference]: Finished difference Result 390 states and 463 transitions. [2024-11-13 14:06:12,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 14:06:12,263 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-11-13 14:06:12,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:06:12,264 INFO L225 Difference]: With dead ends: 390 [2024-11-13 14:06:12,264 INFO L226 Difference]: Without dead ends: 390 [2024-11-13 14:06:12,265 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2024-11-13 14:06:12,266 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 139 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 14:06:12,266 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 969 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 14:06:12,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2024-11-13 14:06:12,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 291. [2024-11-13 14:06:12,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 285 states have (on average 1.2035087719298245) internal successors, (343), 290 states have internal predecessors, (343), 0 states have call successors, (0), 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 14:06:12,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 343 transitions. [2024-11-13 14:06:12,277 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 343 transitions. Word has length 45 [2024-11-13 14:06:12,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:06:12,277 INFO L471 AbstractCegarLoop]: Abstraction has 291 states and 343 transitions. [2024-11-13 14:06:12,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:06:12,278 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 343 transitions. [2024-11-13 14:06:12,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-13 14:06:12,279 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:06:12,279 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:06:12,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-13 14:06:12,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-13 14:06:12,480 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:06:12,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:06:12,481 INFO L85 PathProgramCache]: Analyzing trace with hash -811609057, now seen corresponding path program 1 times [2024-11-13 14:06:12,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:06:12,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640485940] [2024-11-13 14:06:12,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:06:12,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:06:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:12,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:06:12,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:06:12,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640485940] [2024-11-13 14:06:12,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640485940] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:06:12,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123564766] [2024-11-13 14:06:12,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:06:12,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:06:12,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:06:12,875 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:06:12,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-13 14:06:13,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:13,033 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-13 14:06:13,035 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:06:13,041 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 14:06:13,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:06:13,233 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:06:13,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:06:13,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123564766] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:06:13,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:06:13,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2024-11-13 14:06:13,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051220131] [2024-11-13 14:06:13,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:06:13,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-13 14:06:13,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:06:13,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-13 14:06:13,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2024-11-13 14:06:13,516 INFO L87 Difference]: Start difference. First operand 291 states and 343 transitions. Second operand has 24 states, 23 states have (on average 4.130434782608695) internal successors, (95), 24 states have internal predecessors, (95), 0 states have call successors, (0), 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 14:06:14,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:06:14,003 INFO L93 Difference]: Finished difference Result 326 states and 388 transitions. [2024-11-13 14:06:14,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 14:06:14,003 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.130434782608695) internal successors, (95), 24 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-13 14:06:14,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:06:14,004 INFO L225 Difference]: With dead ends: 326 [2024-11-13 14:06:14,005 INFO L226 Difference]: Without dead ends: 326 [2024-11-13 14:06:14,005 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2024-11-13 14:06:14,005 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 63 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 14:06:14,006 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 513 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 14:06:14,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2024-11-13 14:06:14,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 303. [2024-11-13 14:06:14,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 297 states have (on average 1.2121212121212122) internal successors, (360), 302 states have internal predecessors, (360), 0 states have call successors, (0), 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 14:06:14,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 360 transitions. [2024-11-13 14:06:14,012 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 360 transitions. Word has length 46 [2024-11-13 14:06:14,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:06:14,012 INFO L471 AbstractCegarLoop]: Abstraction has 303 states and 360 transitions. [2024-11-13 14:06:14,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.130434782608695) internal successors, (95), 24 states have internal predecessors, (95), 0 states have call successors, (0), 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 14:06:14,012 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 360 transitions. [2024-11-13 14:06:14,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-13 14:06:14,013 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:06:14,013 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:06:14,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-13 14:06:14,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-13 14:06:14,214 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:06:14,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:06:14,214 INFO L85 PathProgramCache]: Analyzing trace with hash -811609058, now seen corresponding path program 1 times [2024-11-13 14:06:14,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:06:14,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566491512] [2024-11-13 14:06:14,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:06:14,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:06:14,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 14:06:14,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:06:14,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566491512] [2024-11-13 14:06:14,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566491512] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:06:14,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:06:14,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:06:14,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770844236] [2024-11-13 14:06:14,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:06:14,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:06:14,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:06:14,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:06:14,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:06:14,313 INFO L87 Difference]: Start difference. First operand 303 states and 360 transitions. Second operand has 6 states, 5 states have (on average 8.4) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:06:14,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:06:14,405 INFO L93 Difference]: Finished difference Result 304 states and 356 transitions. [2024-11-13 14:06:14,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:06:14,406 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-13 14:06:14,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:06:14,408 INFO L225 Difference]: With dead ends: 304 [2024-11-13 14:06:14,408 INFO L226 Difference]: Without dead ends: 301 [2024-11-13 14:06:14,409 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-13 14:06:14,409 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 43 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:06:14,409 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 144 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:06:14,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2024-11-13 14:06:14,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 299. [2024-11-13 14:06:14,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.1938775510204083) internal successors, (351), 298 states have internal predecessors, (351), 0 states have call successors, (0), 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 14:06:14,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 351 transitions. [2024-11-13 14:06:14,416 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 351 transitions. Word has length 46 [2024-11-13 14:06:14,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:06:14,419 INFO L471 AbstractCegarLoop]: Abstraction has 299 states and 351 transitions. [2024-11-13 14:06:14,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:06:14,419 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 351 transitions. [2024-11-13 14:06:14,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-13 14:06:14,420 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:06:14,420 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:06:14,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-11-13 14:06:14,420 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:06:14,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:06:14,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1400058929, now seen corresponding path program 7 times [2024-11-13 14:06:14,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:06:14,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343614884] [2024-11-13 14:06:14,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:06:14,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:06:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:15,041 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 5 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:06:15,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:06:15,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343614884] [2024-11-13 14:06:15,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343614884] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:06:15,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164820748] [2024-11-13 14:06:15,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 14:06:15,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:06:15,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:06:15,046 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:06:15,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-13 14:06:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:15,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-13 14:06:15,207 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:06:15,429 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 14:06:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 5 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:06:15,482 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:06:15,519 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 14:06:15,521 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 14:06:15,640 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 5 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:06:15,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164820748] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:06:15,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:06:15,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 33 [2024-11-13 14:06:15,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763264939] [2024-11-13 14:06:15,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:06:15,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-13 14:06:15,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:06:15,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-13 14:06:15,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2024-11-13 14:06:15,642 INFO L87 Difference]: Start difference. First operand 299 states and 351 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:06:16,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:06:16,470 INFO L93 Difference]: Finished difference Result 464 states and 545 transitions. [2024-11-13 14:06:16,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-13 14:06:16,471 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-11-13 14:06:16,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:06:16,472 INFO L225 Difference]: With dead ends: 464 [2024-11-13 14:06:16,472 INFO L226 Difference]: Without dead ends: 447 [2024-11-13 14:06:16,473 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=183, Invalid=1979, Unknown=0, NotChecked=0, Total=2162 [2024-11-13 14:06:16,473 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 82 mSDsluCounter, 1587 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1676 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 14:06:16,473 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 1676 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 14:06:16,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2024-11-13 14:06:16,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 326. [2024-11-13 14:06:16,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 321 states have (on average 1.190031152647975) internal successors, (382), 325 states have internal predecessors, (382), 0 states have call successors, (0), 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 14:06:16,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 382 transitions. [2024-11-13 14:06:16,481 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 382 transitions. Word has length 47 [2024-11-13 14:06:16,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:06:16,481 INFO L471 AbstractCegarLoop]: Abstraction has 326 states and 382 transitions. [2024-11-13 14:06:16,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:06:16,481 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 382 transitions. [2024-11-13 14:06:16,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-13 14:06:16,482 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:06:16,482 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:06:16,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-13 14:06:16,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-13 14:06:16,683 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:06:16,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:06:16,684 INFO L85 PathProgramCache]: Analyzing trace with hash 619470193, now seen corresponding path program 1 times [2024-11-13 14:06:16,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:06:16,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153742186] [2024-11-13 14:06:16,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:06:16,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:06:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-13 14:06:16,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:06:16,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153742186] [2024-11-13 14:06:16,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153742186] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:06:16,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:06:16,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 14:06:16,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369844837] [2024-11-13 14:06:16,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:06:16,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:06:16,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:06:16,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:06:16,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:06:16,810 INFO L87 Difference]: Start difference. First operand 326 states and 382 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:06:16,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:06:16,858 INFO L93 Difference]: Finished difference Result 378 states and 441 transitions. [2024-11-13 14:06:16,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:06:16,859 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-11-13 14:06:16,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:06:16,860 INFO L225 Difference]: With dead ends: 378 [2024-11-13 14:06:16,860 INFO L226 Difference]: Without dead ends: 359 [2024-11-13 14:06:16,861 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:06:16,861 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 6 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:06:16,861 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 259 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:06:16,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2024-11-13 14:06:16,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 358. [2024-11-13 14:06:16,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 353 states have (on average 1.1813031161473089) internal successors, (417), 357 states have internal predecessors, (417), 0 states have call successors, (0), 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 14:06:16,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 417 transitions. [2024-11-13 14:06:16,868 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 417 transitions. Word has length 47 [2024-11-13 14:06:16,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:06:16,868 INFO L471 AbstractCegarLoop]: Abstraction has 358 states and 417 transitions. [2024-11-13 14:06:16,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:06:16,868 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 417 transitions. [2024-11-13 14:06:16,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-13 14:06:16,869 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:06:16,869 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1] [2024-11-13 14:06:16,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-11-13 14:06:16,869 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:06:16,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:06:16,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1386681215, now seen corresponding path program 4 times [2024-11-13 14:06:16,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:06:16,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443567591] [2024-11-13 14:06:16,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:06:16,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:06:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:17,169 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:06:17,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:06:17,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443567591] [2024-11-13 14:06:17,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443567591] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:06:17,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523674511] [2024-11-13 14:06:17,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:06:17,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:06:17,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:06:17,172 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:06:17,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-13 14:06:17,333 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:06:17,333 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:06:17,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-13 14:06:17,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:06:17,457 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 14:06:18,084 INFO L349 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2024-11-13 14:06:18,084 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 30 treesize of output 28 [2024-11-13 14:06:18,211 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 14:06:18,211 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:06:18,988 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 14:06:18,995 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 45 treesize of output 39 [2024-11-13 14:06:19,509 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 14:06:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 14:06:19,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523674511] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:06:19,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:06:19,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 37 [2024-11-13 14:06:19,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677395650] [2024-11-13 14:06:19,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:06:19,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-13 14:06:19,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:06:19,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-13 14:06:19,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2024-11-13 14:06:19,540 INFO L87 Difference]: Start difference. First operand 358 states and 417 transitions. Second operand has 38 states, 37 states have (on average 3.0) internal successors, (111), 38 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:06:21,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:06:21,584 INFO L93 Difference]: Finished difference Result 369 states and 420 transitions. [2024-11-13 14:06:21,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-13 14:06:21,585 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.0) internal successors, (111), 38 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-11-13 14:06:21,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:06:21,586 INFO L225 Difference]: With dead ends: 369 [2024-11-13 14:06:21,586 INFO L226 Difference]: Without dead ends: 333 [2024-11-13 14:06:21,587 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=430, Invalid=3352, Unknown=0, NotChecked=0, Total=3782 [2024-11-13 14:06:21,588 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 112 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:06:21,588 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 1060 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-13 14:06:21,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2024-11-13 14:06:21,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 300. [2024-11-13 14:06:21,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 296 states have (on average 1.1587837837837838) internal successors, (343), 299 states have internal predecessors, (343), 0 states have call successors, (0), 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 14:06:21,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 343 transitions. [2024-11-13 14:06:21,594 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 343 transitions. Word has length 47 [2024-11-13 14:06:21,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:06:21,594 INFO L471 AbstractCegarLoop]: Abstraction has 300 states and 343 transitions. [2024-11-13 14:06:21,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.0) internal successors, (111), 38 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:06:21,594 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 343 transitions. [2024-11-13 14:06:21,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 14:06:21,595 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:06:21,595 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:06:21,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-13 14:06:21,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-13 14:06:21,796 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:06:21,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:06:21,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1861031131, now seen corresponding path program 8 times [2024-11-13 14:06:21,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:06:21,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917207028] [2024-11-13 14:06:21,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:06:21,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:06:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:22,367 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 40 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:06:22,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:06:22,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917207028] [2024-11-13 14:06:22,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917207028] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:06:22,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576435254] [2024-11-13 14:06:22,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:06:22,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:06:22,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:06:22,370 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:06:22,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-13 14:06:22,548 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:06:22,549 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:06:22,551 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-13 14:06:22,553 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:06:22,888 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 51 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:06:22,889 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:06:23,129 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 14:06:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 51 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:06:23,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576435254] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:06:23,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:06:23,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2024-11-13 14:06:23,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923261524] [2024-11-13 14:06:23,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:06:23,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-13 14:06:23,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:06:23,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-13 14:06:23,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1758, Unknown=0, NotChecked=0, Total=2070 [2024-11-13 14:06:23,461 INFO L87 Difference]: Start difference. First operand 300 states and 343 transitions. Second operand has 46 states, 45 states have (on average 2.8666666666666667) internal successors, (129), 46 states have internal predecessors, (129), 0 states have call successors, (0), 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 14:06:24,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:06:24,251 INFO L93 Difference]: Finished difference Result 389 states and 448 transitions. [2024-11-13 14:06:24,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-13 14:06:24,252 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.8666666666666667) internal successors, (129), 46 states have internal predecessors, (129), 0 states have call successors, (0), 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 50 [2024-11-13 14:06:24,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:06:24,253 INFO L225 Difference]: With dead ends: 389 [2024-11-13 14:06:24,253 INFO L226 Difference]: Without dead ends: 389 [2024-11-13 14:06:24,254 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=443, Invalid=2637, Unknown=0, NotChecked=0, Total=3080 [2024-11-13 14:06:24,255 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 136 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 14:06:24,255 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 855 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 14:06:24,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2024-11-13 14:06:24,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 306. [2024-11-13 14:06:24,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 302 states have (on average 1.1622516556291391) internal successors, (351), 305 states have internal predecessors, (351), 0 states have call successors, (0), 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 14:06:24,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 351 transitions. [2024-11-13 14:06:24,263 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 351 transitions. Word has length 50 [2024-11-13 14:06:24,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:06:24,265 INFO L471 AbstractCegarLoop]: Abstraction has 306 states and 351 transitions. [2024-11-13 14:06:24,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.8666666666666667) internal successors, (129), 46 states have internal predecessors, (129), 0 states have call successors, (0), 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 14:06:24,266 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 351 transitions. [2024-11-13 14:06:24,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-13 14:06:24,266 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:06:24,267 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:06:24,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-13 14:06:24,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-13 14:06:24,467 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:06:24,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:06:24,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1744521378, now seen corresponding path program 9 times [2024-11-13 14:06:24,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:06:24,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736449272] [2024-11-13 14:06:24,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:06:24,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:06:24,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 6 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:06:25,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:06:25,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736449272] [2024-11-13 14:06:25,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736449272] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:06:25,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965175565] [2024-11-13 14:06:25,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:06:25,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:06:25,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:06:25,189 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:06:25,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-13 14:06:25,402 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-13 14:06:25,403 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:06:25,405 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-11-13 14:06:25,407 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:06:25,655 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 14:06:26,675 INFO L349 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2024-11-13 14:06:26,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 51 [2024-11-13 14:06:26,840 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 52 proven. 39 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 14:06:26,840 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:06:28,155 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 14:06:28,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 77 [2024-11-13 14:06:28,175 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 14:06:28,627 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 7 proven. 84 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 14:06:28,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965175565] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:06:28,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:06:28,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 64 [2024-11-13 14:06:28,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555590049] [2024-11-13 14:06:28,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:06:28,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-13 14:06:28,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:06:28,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-13 14:06:28,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=3695, Unknown=0, NotChecked=0, Total=4032 [2024-11-13 14:06:28,629 INFO L87 Difference]: Start difference. First operand 306 states and 351 transitions. Second operand has 64 states, 64 states have (on average 1.953125) internal successors, (125), 64 states have internal predecessors, (125), 0 states have call successors, (0), 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 14:06:39,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:06:39,812 INFO L93 Difference]: Finished difference Result 578 states and 671 transitions. [2024-11-13 14:06:39,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-11-13 14:06:39,813 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.953125) internal successors, (125), 64 states have internal predecessors, (125), 0 states have call successors, (0), 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 52 [2024-11-13 14:06:39,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:06:39,815 INFO L225 Difference]: With dead ends: 578 [2024-11-13 14:06:39,815 INFO L226 Difference]: Without dead ends: 559 [2024-11-13 14:06:39,818 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4249 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=1537, Invalid=12982, Unknown=1, NotChecked=0, Total=14520 [2024-11-13 14:06:39,818 INFO L432 NwaCegarLoop]: 97 mSDtfsCounter, 215 mSDsluCounter, 2585 mSDsCounter, 0 mSdLazyCounter, 3215 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 2682 SdHoareTripleChecker+Invalid, 3240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 3215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-13 14:06:39,819 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 2682 Invalid, 3240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 3215 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-13 14:06:39,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2024-11-13 14:06:39,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 361. [2024-11-13 14:06:39,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 357 states have (on average 1.1708683473389356) internal successors, (418), 360 states have internal predecessors, (418), 0 states have call successors, (0), 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 14:06:39,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 418 transitions. [2024-11-13 14:06:39,828 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 418 transitions. Word has length 52 [2024-11-13 14:06:39,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:06:39,828 INFO L471 AbstractCegarLoop]: Abstraction has 361 states and 418 transitions. [2024-11-13 14:06:39,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.953125) internal successors, (125), 64 states have internal predecessors, (125), 0 states have call successors, (0), 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 14:06:39,828 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 418 transitions. [2024-11-13 14:06:39,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-13 14:06:39,829 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:06:39,829 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:06:39,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-13 14:06:40,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-13 14:06:40,030 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:06:40,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:06:40,030 INFO L85 PathProgramCache]: Analyzing trace with hash -910947102, now seen corresponding path program 1 times [2024-11-13 14:06:40,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:06:40,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902519184] [2024-11-13 14:06:40,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:06:40,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:06:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:40,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-13 14:06:40,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:06:40,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902519184] [2024-11-13 14:06:40,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902519184] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:06:40,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696866764] [2024-11-13 14:06:40,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:06:40,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:06:40,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:06:40,169 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:06:40,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-13 14:06:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:40,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-11-13 14:06:40,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:06:40,433 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 14:06:40,451 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 8 treesize of output 1 [2024-11-13 14:06:40,711 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 14:06:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 14:06:40,742 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:06:41,092 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 14 [2024-11-13 14:06:41,097 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 14:06:41,099 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 14:06:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 14:06:41,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696866764] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:06:41,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:06:41,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 17, 18] total 35 [2024-11-13 14:06:41,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532373821] [2024-11-13 14:06:41,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:06:41,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-13 14:06:41,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:06:41,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-13 14:06:41,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2024-11-13 14:06:41,192 INFO L87 Difference]: Start difference. First operand 361 states and 418 transitions. Second operand has 35 states, 35 states have (on average 3.1714285714285713) internal successors, (111), 35 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:06:42,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:06:42,099 INFO L93 Difference]: Finished difference Result 420 states and 481 transitions. [2024-11-13 14:06:42,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-13 14:06:42,100 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.1714285714285713) internal successors, (111), 35 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-11-13 14:06:42,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:06:42,101 INFO L225 Difference]: With dead ends: 420 [2024-11-13 14:06:42,101 INFO L226 Difference]: Without dead ends: 329 [2024-11-13 14:06:42,101 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=234, Invalid=2418, Unknown=0, NotChecked=0, Total=2652 [2024-11-13 14:06:42,102 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 61 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 14:06:42,102 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 893 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 14:06:42,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2024-11-13 14:06:42,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 269. [2024-11-13 14:06:42,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 265 states have (on average 1.1735849056603773) internal successors, (311), 268 states have internal predecessors, (311), 0 states have call successors, (0), 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 14:06:42,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 311 transitions. [2024-11-13 14:06:42,109 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 311 transitions. Word has length 52 [2024-11-13 14:06:42,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:06:42,109 INFO L471 AbstractCegarLoop]: Abstraction has 269 states and 311 transitions. [2024-11-13 14:06:42,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.1714285714285713) internal successors, (111), 35 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:06:42,109 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 311 transitions. [2024-11-13 14:06:42,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-13 14:06:42,110 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:06:42,110 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1] [2024-11-13 14:06:42,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-13 14:06:42,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-13 14:06:42,311 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:06:42,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:06:42,311 INFO L85 PathProgramCache]: Analyzing trace with hash -669059992, now seen corresponding path program 1 times [2024-11-13 14:06:42,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:06:42,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795065639] [2024-11-13 14:06:42,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:06:42,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:06:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 14:06:42,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:06:42,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795065639] [2024-11-13 14:06:42,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795065639] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:06:42,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183619719] [2024-11-13 14:06:42,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:06:42,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:06:42,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:06:42,545 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:06:42,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-13 14:06:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:42,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-13 14:06:42,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:06:42,895 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 14:06:42,895 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:06:43,157 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 14:06:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 14:06:43,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183619719] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:06:43,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:06:43,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-11-13 14:06:43,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518986822] [2024-11-13 14:06:43,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:06:43,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 14:06:43,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:06:43,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 14:06:43,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2024-11-13 14:06:43,198 INFO L87 Difference]: Start difference. First operand 269 states and 311 transitions. Second operand has 23 states, 22 states have (on average 5.045454545454546) internal successors, (111), 23 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:06:43,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:06:43,626 INFO L93 Difference]: Finished difference Result 367 states and 423 transitions. [2024-11-13 14:06:43,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 14:06:43,627 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 5.045454545454546) internal successors, (111), 23 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2024-11-13 14:06:43,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:06:43,628 INFO L225 Difference]: With dead ends: 367 [2024-11-13 14:06:43,628 INFO L226 Difference]: Without dead ends: 367 [2024-11-13 14:06:43,628 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2024-11-13 14:06:43,628 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 146 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 14:06:43,628 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 660 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 14:06:43,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2024-11-13 14:06:43,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 320. [2024-11-13 14:06:43,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 316 states have (on average 1.1835443037974684) internal successors, (374), 319 states have internal predecessors, (374), 0 states have call successors, (0), 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 14:06:43,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 374 transitions. [2024-11-13 14:06:43,634 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 374 transitions. Word has length 53 [2024-11-13 14:06:43,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:06:43,634 INFO L471 AbstractCegarLoop]: Abstraction has 320 states and 374 transitions. [2024-11-13 14:06:43,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 5.045454545454546) internal successors, (111), 23 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:06:43,635 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 374 transitions. [2024-11-13 14:06:43,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-13 14:06:43,635 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:06:43,636 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:06:43,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-13 14:06:43,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:06:43,836 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:06:43,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:06:43,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1003664039, now seen corresponding path program 2 times [2024-11-13 14:06:43,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:06:43,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5265323] [2024-11-13 14:06:43,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:06:43,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:06:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 14:06:44,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:06:44,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5265323] [2024-11-13 14:06:44,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5265323] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:06:44,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367336755] [2024-11-13 14:06:44,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:06:44,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:06:44,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:06:44,303 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:06:44,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-13 14:06:44,491 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:06:44,491 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:06:44,493 INFO L255 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-13 14:06:44,494 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:06:44,627 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 14:06:44,674 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 14:06:44,897 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 14:06:44,897 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:06:45,150 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 22 treesize of output 14 [2024-11-13 14:06:45,157 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 14:06:45,159 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 14:06:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 14:06:45,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367336755] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:06:45,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:06:45,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 18] total 40 [2024-11-13 14:06:45,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250348994] [2024-11-13 14:06:45,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:06:45,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-13 14:06:45,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:06:45,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-13 14:06:45,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1441, Unknown=0, NotChecked=0, Total=1560 [2024-11-13 14:06:45,260 INFO L87 Difference]: Start difference. First operand 320 states and 374 transitions. Second operand has 40 states, 40 states have (on average 3.075) internal successors, (123), 40 states have internal predecessors, (123), 0 states have call successors, (0), 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 14:06:46,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:06:46,004 INFO L93 Difference]: Finished difference Result 565 states and 658 transitions. [2024-11-13 14:06:46,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-13 14:06:46,005 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.075) internal successors, (123), 40 states have internal predecessors, (123), 0 states have call successors, (0), 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 14:06:46,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:06:46,006 INFO L225 Difference]: With dead ends: 565 [2024-11-13 14:06:46,006 INFO L226 Difference]: Without dead ends: 491 [2024-11-13 14:06:46,006 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=166, Invalid=1996, Unknown=0, NotChecked=0, Total=2162 [2024-11-13 14:06:46,007 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 160 mSDsluCounter, 2113 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 2185 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 14:06:46,007 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 2185 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1177 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 14:06:46,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2024-11-13 14:06:46,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 482. [2024-11-13 14:06:46,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 478 states have (on average 1.1841004184100419) internal successors, (566), 481 states have internal predecessors, (566), 0 states have call successors, (0), 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 14:06:46,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 566 transitions. [2024-11-13 14:06:46,013 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 566 transitions. Word has length 58 [2024-11-13 14:06:46,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:06:46,014 INFO L471 AbstractCegarLoop]: Abstraction has 482 states and 566 transitions. [2024-11-13 14:06:46,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.075) internal successors, (123), 40 states have internal predecessors, (123), 0 states have call successors, (0), 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 14:06:46,014 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 566 transitions. [2024-11-13 14:06:46,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-13 14:06:46,015 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:06:46,015 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:06:46,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-13 14:06:46,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-13 14:06:46,216 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:06:46,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:06:46,216 INFO L85 PathProgramCache]: Analyzing trace with hash 638326349, now seen corresponding path program 2 times [2024-11-13 14:06:46,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:06:46,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630974354] [2024-11-13 14:06:46,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:06:46,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:06:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-13 14:06:46,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:06:46,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630974354] [2024-11-13 14:06:46,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630974354] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:06:46,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643864053] [2024-11-13 14:06:46,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:06:46,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:06:46,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:06:46,576 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:06:46,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-13 14:06:46,770 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:06:46,770 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:06:46,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-13 14:06:46,774 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:06:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-13 14:06:47,023 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:06:47,261 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 14:06:47,465 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-13 14:06:47,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643864053] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:06:47,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:06:47,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2024-11-13 14:06:47,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622168499] [2024-11-13 14:06:47,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:06:47,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-13 14:06:47,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:06:47,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-13 14:06:47,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2024-11-13 14:06:47,466 INFO L87 Difference]: Start difference. First operand 482 states and 566 transitions. Second operand has 26 states, 25 states have (on average 4.92) internal successors, (123), 26 states have internal predecessors, (123), 0 states have call successors, (0), 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 14:06:47,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:06:47,943 INFO L93 Difference]: Finished difference Result 510 states and 597 transitions. [2024-11-13 14:06:47,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 14:06:47,943 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.92) internal successors, (123), 26 states have internal predecessors, (123), 0 states have call successors, (0), 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 60 [2024-11-13 14:06:47,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:06:47,944 INFO L225 Difference]: With dead ends: 510 [2024-11-13 14:06:47,944 INFO L226 Difference]: Without dead ends: 510 [2024-11-13 14:06:47,945 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2024-11-13 14:06:47,945 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 69 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 14:06:47,945 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 632 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 14:06:47,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2024-11-13 14:06:47,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 490. [2024-11-13 14:06:47,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 486 states have (on average 1.1893004115226338) internal successors, (578), 489 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 14:06:47,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 578 transitions. [2024-11-13 14:06:47,953 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 578 transitions. Word has length 60 [2024-11-13 14:06:47,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:06:47,954 INFO L471 AbstractCegarLoop]: Abstraction has 490 states and 578 transitions. [2024-11-13 14:06:47,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.92) internal successors, (123), 26 states have internal predecessors, (123), 0 states have call successors, (0), 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 14:06:47,954 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 578 transitions. [2024-11-13 14:06:47,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-13 14:06:47,955 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:06:47,955 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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 14:06:47,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-13 14:06:48,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-13 14:06:48,156 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:06:48,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:06:48,156 INFO L85 PathProgramCache]: Analyzing trace with hash -325875445, now seen corresponding path program 3 times [2024-11-13 14:06:48,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:06:48,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230152250] [2024-11-13 14:06:48,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:06:48,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:06:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:48,465 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 14:06:48,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:06:48,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230152250] [2024-11-13 14:06:48,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230152250] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:06:48,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885897360] [2024-11-13 14:06:48,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:06:48,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:06:48,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:06:48,467 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:06:48,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-13 14:06:48,663 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 14:06:48,663 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:06:48,665 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-13 14:06:48,667 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:06:48,824 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 14:06:51,483 INFO L349 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2024-11-13 14:06:51,483 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 28 treesize of output 39 [2024-11-13 14:06:51,823 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-13 14:06:51,823 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:06:53,536 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 42 treesize of output 36 [2024-11-13 14:06:53,558 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:06:53,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 82 [2024-11-13 14:06:54,105 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 14:06:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-13 14:06:54,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885897360] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:06:54,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:06:54,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21, 21] total 50 [2024-11-13 14:06:54,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731710573] [2024-11-13 14:06:54,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:06:54,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-13 14:06:54,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:06:54,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-13 14:06:54,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2283, Unknown=0, NotChecked=0, Total=2550 [2024-11-13 14:06:54,142 INFO L87 Difference]: Start difference. First operand 490 states and 578 transitions. Second operand has 51 states, 50 states have (on average 2.72) internal successors, (136), 51 states have internal predecessors, (136), 0 states have call successors, (0), 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 14:06:58,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:06:58,375 INFO L93 Difference]: Finished difference Result 597 states and 691 transitions. [2024-11-13 14:06:58,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-13 14:06:58,375 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 2.72) internal successors, (136), 51 states have internal predecessors, (136), 0 states have call successors, (0), 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 14:06:58,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:06:58,376 INFO L225 Difference]: With dead ends: 597 [2024-11-13 14:06:58,376 INFO L226 Difference]: Without dead ends: 494 [2024-11-13 14:06:58,377 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2234 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1101, Invalid=8019, Unknown=0, NotChecked=0, Total=9120 [2024-11-13 14:06:58,378 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 547 mSDsluCounter, 1282 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 1354 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-13 14:06:58,378 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 1354 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1577 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-13 14:06:58,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2024-11-13 14:06:58,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 398. [2024-11-13 14:06:58,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 394 states have (on average 1.1751269035532994) internal successors, (463), 397 states have internal predecessors, (463), 0 states have call successors, (0), 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 14:06:58,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 463 transitions. [2024-11-13 14:06:58,385 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 463 transitions. Word has length 61 [2024-11-13 14:06:58,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:06:58,385 INFO L471 AbstractCegarLoop]: Abstraction has 398 states and 463 transitions. [2024-11-13 14:06:58,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 2.72) internal successors, (136), 51 states have internal predecessors, (136), 0 states have call successors, (0), 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 14:06:58,385 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 463 transitions. [2024-11-13 14:06:58,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-13 14:06:58,386 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:06:58,386 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:06:58,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-13 14:06:58,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:06:58,587 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:06:58,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:06:58,587 INFO L85 PathProgramCache]: Analyzing trace with hash -748700178, now seen corresponding path program 1 times [2024-11-13 14:06:58,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:06:58,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383644022] [2024-11-13 14:06:58,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:06:58,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:06:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-13 14:06:59,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:06:59,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383644022] [2024-11-13 14:06:59,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383644022] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:06:59,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757544262] [2024-11-13 14:06:59,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:06:59,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:06:59,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:06:59,190 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:06:59,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-13 14:06:59,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:06:59,395 INFO L255 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-13 14:06:59,397 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:06:59,400 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 14:06:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-13 14:06:59,699 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:07:00,075 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-13 14:07:00,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757544262] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:07:00,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:07:00,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 29 [2024-11-13 14:07:00,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037974887] [2024-11-13 14:07:00,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:07:00,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-13 14:07:00,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:07:00,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-13 14:07:00,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2024-11-13 14:07:00,077 INFO L87 Difference]: Start difference. First operand 398 states and 463 transitions. Second operand has 30 states, 29 states have (on average 4.172413793103448) internal successors, (121), 30 states have internal predecessors, (121), 0 states have call successors, (0), 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 14:07:00,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:07:00,631 INFO L93 Difference]: Finished difference Result 451 states and 528 transitions. [2024-11-13 14:07:00,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 14:07:00,631 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.172413793103448) internal successors, (121), 30 states have internal predecessors, (121), 0 states have call successors, (0), 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 14:07:00,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:07:00,633 INFO L225 Difference]: With dead ends: 451 [2024-11-13 14:07:00,633 INFO L226 Difference]: Without dead ends: 451 [2024-11-13 14:07:00,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=239, Invalid=1321, Unknown=0, NotChecked=0, Total=1560 [2024-11-13 14:07:00,633 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 203 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 14:07:00,633 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 478 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 14:07:00,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2024-11-13 14:07:00,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 433. [2024-11-13 14:07:00,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 429 states have (on average 1.1934731934731935) internal successors, (512), 432 states have internal predecessors, (512), 0 states have call successors, (0), 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 14:07:00,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 512 transitions. [2024-11-13 14:07:00,639 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 512 transitions. Word has length 62 [2024-11-13 14:07:00,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:07:00,640 INFO L471 AbstractCegarLoop]: Abstraction has 433 states and 512 transitions. [2024-11-13 14:07:00,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.172413793103448) internal successors, (121), 30 states have internal predecessors, (121), 0 states have call successors, (0), 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 14:07:00,640 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 512 transitions. [2024-11-13 14:07:00,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-13 14:07:00,641 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:07:00,641 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:07:00,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-13 14:07:00,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-13 14:07:00,842 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:07:00,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:07:00,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1921524180, now seen corresponding path program 10 times [2024-11-13 14:07:00,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:07:00,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527813179] [2024-11-13 14:07:00,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:07:00,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:07:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:07:02,154 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:07:02,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:07:02,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527813179] [2024-11-13 14:07:02,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527813179] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:07:02,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37527147] [2024-11-13 14:07:02,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:07:02,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:07:02,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:07:02,156 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:07:02,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-13 14:07:02,372 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:07:02,372 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:07:02,374 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-11-13 14:07:02,377 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:07:02,873 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 14:07:27,677 INFO L349 Elim1Store]: treesize reduction 33, result has 49.2 percent of original size [2024-11-13 14:07:27,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 88 treesize of output 66 [2024-11-13 14:07:27,681 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-13 14:07:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 51 proven. 98 refuted. 34 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 14:07:27,743 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:07:29,541 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 119 treesize of output 103 [2024-11-13 14:07:29,556 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:07:29,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 119 treesize of output 89 [2024-11-13 14:07:30,607 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 91 proven. 92 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 14:07:30,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37527147] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:07:30,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:07:30,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31, 31] total 84 [2024-11-13 14:07:30,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295053517] [2024-11-13 14:07:30,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:07:30,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-11-13 14:07:30,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:07:30,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-11-13 14:07:30,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=6481, Unknown=47, NotChecked=0, Total=6972 [2024-11-13 14:07:30,610 INFO L87 Difference]: Start difference. First operand 433 states and 512 transitions. Second operand has 84 states, 84 states have (on average 1.9404761904761905) internal successors, (163), 84 states have internal predecessors, (163), 0 states have call successors, (0), 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 14:07:40,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:07:40,195 INFO L93 Difference]: Finished difference Result 685 states and 819 transitions. [2024-11-13 14:07:40,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-13 14:07:40,196 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.9404761904761905) internal successors, (163), 84 states have internal predecessors, (163), 0 states have call successors, (0), 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 14:07:40,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:07:40,198 INFO L225 Difference]: With dead ends: 685 [2024-11-13 14:07:40,198 INFO L226 Difference]: Without dead ends: 664 [2024-11-13 14:07:40,198 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3892 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=1137, Invalid=12857, Unknown=48, NotChecked=0, Total=14042 [2024-11-13 14:07:40,199 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 334 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 1931 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 1964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1931 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-13 14:07:40,199 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 1215 Invalid, 1964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1931 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2024-11-13 14:07:40,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2024-11-13 14:07:40,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 468. [2024-11-13 14:07:40,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 464 states have (on average 1.1875) internal successors, (551), 467 states have internal predecessors, (551), 0 states have call successors, (0), 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 14:07:40,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 551 transitions. [2024-11-13 14:07:40,208 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 551 transitions. Word has length 63 [2024-11-13 14:07:40,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:07:40,208 INFO L471 AbstractCegarLoop]: Abstraction has 468 states and 551 transitions. [2024-11-13 14:07:40,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.9404761904761905) internal successors, (163), 84 states have internal predecessors, (163), 0 states have call successors, (0), 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 14:07:40,208 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 551 transitions. [2024-11-13 14:07:40,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-13 14:07:40,209 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:07:40,209 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:07:40,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-13 14:07:40,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2024-11-13 14:07:40,410 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:07:40,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:07:40,410 INFO L85 PathProgramCache]: Analyzing trace with hash 895676972, now seen corresponding path program 1 times [2024-11-13 14:07:40,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:07:40,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541551342] [2024-11-13 14:07:40,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:07:40,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:07:40,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:07:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 14:07:41,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:07:41,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541551342] [2024-11-13 14:07:41,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541551342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:07:41,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580422849] [2024-11-13 14:07:41,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:07:41,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:07:41,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:07:41,144 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:07:41,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-13 14:07:41,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:07:41,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-13 14:07:41,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:07:41,527 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 14:07:41,554 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 8 treesize of output 1 [2024-11-13 14:07:41,926 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 14:07:41,962 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 14:07:41,962 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:07:42,228 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 14 [2024-11-13 14:07:42,232 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 14:07:42,234 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 14:07:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 14:07:42,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580422849] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:07:42,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:07:42,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 44 [2024-11-13 14:07:42,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145521344] [2024-11-13 14:07:42,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:07:42,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-13 14:07:42,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:07:42,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-13 14:07:42,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1741, Unknown=0, NotChecked=0, Total=1892 [2024-11-13 14:07:42,358 INFO L87 Difference]: Start difference. First operand 468 states and 551 transitions. Second operand has 44 states, 44 states have (on average 2.75) internal successors, (121), 44 states have internal predecessors, (121), 0 states have call successors, (0), 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 14:07:43,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:07:43,089 INFO L93 Difference]: Finished difference Result 451 states and 523 transitions. [2024-11-13 14:07:43,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-13 14:07:43,090 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.75) internal successors, (121), 44 states have internal predecessors, (121), 0 states have call successors, (0), 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 65 [2024-11-13 14:07:43,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:07:43,091 INFO L225 Difference]: With dead ends: 451 [2024-11-13 14:07:43,091 INFO L226 Difference]: Without dead ends: 432 [2024-11-13 14:07:43,091 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=226, Invalid=2744, Unknown=0, NotChecked=0, Total=2970 [2024-11-13 14:07:43,092 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 80 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 14:07:43,092 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 1061 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 14:07:43,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2024-11-13 14:07:43,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 426. [2024-11-13 14:07:43,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 422 states have (on average 1.1682464454976302) internal successors, (493), 425 states have internal predecessors, (493), 0 states have call successors, (0), 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 14:07:43,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 493 transitions. [2024-11-13 14:07:43,097 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 493 transitions. Word has length 65 [2024-11-13 14:07:43,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:07:43,098 INFO L471 AbstractCegarLoop]: Abstraction has 426 states and 493 transitions. [2024-11-13 14:07:43,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.75) internal successors, (121), 44 states have internal predecessors, (121), 0 states have call successors, (0), 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 14:07:43,098 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 493 transitions. [2024-11-13 14:07:43,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-13 14:07:43,099 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:07:43,099 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:07:43,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-13 14:07:43,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2024-11-13 14:07:43,300 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:07:43,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:07:43,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1357943170, now seen corresponding path program 11 times [2024-11-13 14:07:43,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:07:43,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196554646] [2024-11-13 14:07:43,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:07:43,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:07:43,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:07:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:07:44,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:07:44,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196554646] [2024-11-13 14:07:44,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196554646] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:07:44,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926703934] [2024-11-13 14:07:44,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 14:07:44,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:07:44,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:07:44,738 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:07:44,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-13 14:07:44,983 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-13 14:07:44,983 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:07:44,985 INFO L255 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-11-13 14:07:44,988 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:07:45,441 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 14:07:45,999 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 40 proven. 173 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:07:45,999 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:07:46,041 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 14:07:46,043 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 14:07:46,213 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 40 proven. 173 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:07:46,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926703934] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:07:46,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:07:46,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25, 25] total 55 [2024-11-13 14:07:46,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246324692] [2024-11-13 14:07:46,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:07:46,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-13 14:07:46,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:07:46,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-13 14:07:46,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2837, Unknown=0, NotChecked=0, Total=2970 [2024-11-13 14:07:46,215 INFO L87 Difference]: Start difference. First operand 426 states and 493 transitions. Second operand has 55 states, 55 states have (on average 2.3636363636363638) internal successors, (130), 55 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 14:07:50,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:07:50,766 INFO L93 Difference]: Finished difference Result 768 states and 905 transitions. [2024-11-13 14:07:50,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-13 14:07:50,767 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.3636363636363638) internal successors, (130), 55 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 66 [2024-11-13 14:07:50,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:07:50,768 INFO L225 Difference]: With dead ends: 768 [2024-11-13 14:07:50,768 INFO L226 Difference]: Without dead ends: 745 [2024-11-13 14:07:50,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=480, Invalid=8262, Unknown=0, NotChecked=0, Total=8742 [2024-11-13 14:07:50,769 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 157 mSDsluCounter, 2579 mSDsCounter, 0 mSdLazyCounter, 4422 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 2646 SdHoareTripleChecker+Invalid, 4449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 4422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-13 14:07:50,769 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 2646 Invalid, 4449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 4422 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-13 14:07:50,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2024-11-13 14:07:50,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 461. [2024-11-13 14:07:50,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 457 states have (on average 1.1641137855579868) internal successors, (532), 460 states have internal predecessors, (532), 0 states have call successors, (0), 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 14:07:50,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 532 transitions. [2024-11-13 14:07:50,777 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 532 transitions. Word has length 66 [2024-11-13 14:07:50,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:07:50,778 INFO L471 AbstractCegarLoop]: Abstraction has 461 states and 532 transitions. [2024-11-13 14:07:50,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.3636363636363638) internal successors, (130), 55 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 14:07:50,778 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 532 transitions. [2024-11-13 14:07:50,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-13 14:07:50,779 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:07:50,779 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:07:50,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-13 14:07:50,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:07:50,980 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:07:50,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:07:50,980 INFO L85 PathProgramCache]: Analyzing trace with hash -2140159376, now seen corresponding path program 1 times [2024-11-13 14:07:50,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:07:50,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455653592] [2024-11-13 14:07:50,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:07:50,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:07:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:07:51,393 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-13 14:07:51,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:07:51,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455653592] [2024-11-13 14:07:51,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455653592] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:07:51,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964831677] [2024-11-13 14:07:51,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:07:51,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:07:51,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:07:51,395 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:07:51,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-13 14:07:51,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:07:51,614 INFO L255 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-13 14:07:51,616 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:07:51,621 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 14:07:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-13 14:07:51,836 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:07:52,271 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-13 14:07:52,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964831677] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:07:52,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:07:52,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2024-11-13 14:07:52,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141700] [2024-11-13 14:07:52,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:07:52,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-13 14:07:52,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:07:52,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-13 14:07:52,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2024-11-13 14:07:52,273 INFO L87 Difference]: Start difference. First operand 461 states and 532 transitions. Second operand has 31 states, 30 states have (on average 4.3) internal successors, (129), 31 states have internal predecessors, (129), 0 states have call successors, (0), 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 14:07:52,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:07:52,854 INFO L93 Difference]: Finished difference Result 495 states and 567 transitions. [2024-11-13 14:07:52,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-13 14:07:52,855 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.3) internal successors, (129), 31 states have internal predecessors, (129), 0 states have call successors, (0), 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 66 [2024-11-13 14:07:52,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:07:52,856 INFO L225 Difference]: With dead ends: 495 [2024-11-13 14:07:52,856 INFO L226 Difference]: Without dead ends: 489 [2024-11-13 14:07:52,856 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2024-11-13 14:07:52,856 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 119 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 14:07:52,857 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 593 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 14:07:52,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2024-11-13 14:07:52,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 463. [2024-11-13 14:07:52,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 459 states have (on average 1.1633986928104576) internal successors, (534), 462 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 14:07:52,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 534 transitions. [2024-11-13 14:07:52,862 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 534 transitions. Word has length 66 [2024-11-13 14:07:52,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:07:52,863 INFO L471 AbstractCegarLoop]: Abstraction has 463 states and 534 transitions. [2024-11-13 14:07:52,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.3) internal successors, (129), 31 states have internal predecessors, (129), 0 states have call successors, (0), 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 14:07:52,863 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 534 transitions. [2024-11-13 14:07:52,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-13 14:07:52,864 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:07:52,864 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:07:52,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-13 14:07:53,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:07:53,065 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:07:53,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:07:53,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1910884032, now seen corresponding path program 3 times [2024-11-13 14:07:53,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:07:53,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702450424] [2024-11-13 14:07:53,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:07:53,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:07:53,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:07:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-13 14:07:53,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:07:53,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702450424] [2024-11-13 14:07:53,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702450424] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:07:53,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333758794] [2024-11-13 14:07:53,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:07:53,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:07:53,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:07:53,257 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:07:53,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-13 14:07:53,513 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 14:07:53,513 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:07:53,520 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 138 conjuncts are in the unsatisfiable core [2024-11-13 14:07:53,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:07:53,707 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 14:07:53,746 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 8 treesize of output 1 [2024-11-13 14:07:55,495 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-11-13 14:07:55,495 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 47 treesize of output 41 [2024-11-13 14:07:55,675 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:07:55,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 32 treesize of output 16 [2024-11-13 14:07:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-13 14:07:55,855 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:07:58,221 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:07:58,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 38 [2024-11-13 14:07:58,368 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 14:07:58,375 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 14:07:58,389 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 44 treesize of output 34 [2024-11-13 14:07:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-13 14:07:58,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333758794] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:07:58,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:07:58,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 26, 27] total 60 [2024-11-13 14:07:58,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355803889] [2024-11-13 14:07:58,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:07:58,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-13 14:07:58,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:07:58,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-13 14:07:58,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=3310, Unknown=0, NotChecked=0, Total=3540 [2024-11-13 14:07:58,722 INFO L87 Difference]: Start difference. First operand 463 states and 534 transitions. Second operand has 60 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 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 14:08:08,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:08:08,782 INFO L93 Difference]: Finished difference Result 724 states and 839 transitions. [2024-11-13 14:08:08,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-11-13 14:08:08,783 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 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 14:08:08,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:08:08,784 INFO L225 Difference]: With dead ends: 724 [2024-11-13 14:08:08,784 INFO L226 Difference]: Without dead ends: 687 [2024-11-13 14:08:08,784 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4163 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=1879, Invalid=17027, Unknown=0, NotChecked=0, Total=18906 [2024-11-13 14:08:08,785 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 983 mSDsluCounter, 1409 mSDsCounter, 0 mSdLazyCounter, 2525 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 2551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:08:08,785 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 1445 Invalid, 2551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2525 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-13 14:08:08,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2024-11-13 14:08:08,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 567. [2024-11-13 14:08:08,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 563 states have (on average 1.1865008880994672) internal successors, (668), 566 states have internal predecessors, (668), 0 states have call successors, (0), 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 14:08:08,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 668 transitions. [2024-11-13 14:08:08,792 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 668 transitions. Word has length 67 [2024-11-13 14:08:08,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:08:08,792 INFO L471 AbstractCegarLoop]: Abstraction has 567 states and 668 transitions. [2024-11-13 14:08:08,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 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 14:08:08,793 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 668 transitions. [2024-11-13 14:08:08,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-13 14:08:08,794 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:08:08,794 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:08:08,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-11-13 14:08:08,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:08:08,996 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:08:08,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:08:08,996 INFO L85 PathProgramCache]: Analyzing trace with hash 237341242, now seen corresponding path program 2 times [2024-11-13 14:08:08,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:08:08,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948055287] [2024-11-13 14:08:08,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:08:08,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:08:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:08:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-13 14:08:09,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:08:09,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948055287] [2024-11-13 14:08:09,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948055287] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:08:09,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407562646] [2024-11-13 14:08:09,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:08:09,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:08:09,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:08:09,320 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:08:09,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-13 14:08:09,593 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:08:09,593 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:08:09,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-13 14:08:09,597 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:08:09,922 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-13 14:08:09,922 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:08:10,164 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 14:08:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-13 14:08:10,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407562646] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:08:10,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:08:10,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2024-11-13 14:08:10,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003047091] [2024-11-13 14:08:10,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:08:10,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-13 14:08:10,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:08:10,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-13 14:08:10,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2024-11-13 14:08:10,408 INFO L87 Difference]: Start difference. First operand 567 states and 668 transitions. Second operand has 31 states, 30 states have (on average 4.733333333333333) internal successors, (142), 31 states have internal predecessors, (142), 0 states have call successors, (0), 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 14:08:11,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:08:11,072 INFO L93 Difference]: Finished difference Result 656 states and 764 transitions. [2024-11-13 14:08:11,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-13 14:08:11,072 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.733333333333333) internal successors, (142), 31 states have internal predecessors, (142), 0 states have call successors, (0), 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 68 [2024-11-13 14:08:11,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:08:11,074 INFO L225 Difference]: With dead ends: 656 [2024-11-13 14:08:11,075 INFO L226 Difference]: Without dead ends: 656 [2024-11-13 14:08:11,075 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=1282, Unknown=0, NotChecked=0, Total=1482 [2024-11-13 14:08:11,075 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 245 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 14:08:11,075 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 1002 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 14:08:11,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2024-11-13 14:08:11,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 596. [2024-11-13 14:08:11,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 592 states have (on average 1.1858108108108107) internal successors, (702), 595 states have internal predecessors, (702), 0 states have call successors, (0), 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 14:08:11,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 702 transitions. [2024-11-13 14:08:11,083 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 702 transitions. Word has length 68 [2024-11-13 14:08:11,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:08:11,084 INFO L471 AbstractCegarLoop]: Abstraction has 596 states and 702 transitions. [2024-11-13 14:08:11,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.733333333333333) internal successors, (142), 31 states have internal predecessors, (142), 0 states have call successors, (0), 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 14:08:11,084 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 702 transitions. [2024-11-13 14:08:11,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-13 14:08:11,085 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:08:11,085 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:08:11,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-13 14:08:11,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:08:11,286 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:08:11,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:08:11,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1946282388, now seen corresponding path program 12 times [2024-11-13 14:08:11,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:08:11,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161695222] [2024-11-13 14:08:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:08:11,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:08:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:08:13,014 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:08:13,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:08:13,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161695222] [2024-11-13 14:08:13,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161695222] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:08:13,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042389279] [2024-11-13 14:08:13,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 14:08:13,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:08:13,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:08:13,016 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:08:13,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-13 14:08:13,416 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-13 14:08:13,416 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:08:13,419 INFO L255 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 92 conjuncts are in the unsatisfiable core [2024-11-13 14:08:13,422 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:08:14,196 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 14:08:14,943 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 27 proven. 217 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 14:08:14,944 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:08:15,690 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 14:08:15,693 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 16 treesize of output 12 [2024-11-13 14:08:16,589 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 27 proven. 217 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 14:08:16,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042389279] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:08:16,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:08:16,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 27] total 81 [2024-11-13 14:08:16,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945887200] [2024-11-13 14:08:16,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:08:16,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-11-13 14:08:16,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:08:16,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-11-13 14:08:16,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=6252, Unknown=0, NotChecked=0, Total=6480 [2024-11-13 14:08:16,590 INFO L87 Difference]: Start difference. First operand 596 states and 702 transitions. Second operand has 81 states, 81 states have (on average 2.4074074074074074) internal successors, (195), 81 states have internal predecessors, (195), 0 states have call successors, (0), 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 14:08:25,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:08:25,749 INFO L93 Difference]: Finished difference Result 1200 states and 1445 transitions. [2024-11-13 14:08:25,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-13 14:08:25,750 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.4074074074074074) internal successors, (195), 81 states have internal predecessors, (195), 0 states have call successors, (0), 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 69 [2024-11-13 14:08:25,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:08:25,752 INFO L225 Difference]: With dead ends: 1200 [2024-11-13 14:08:25,752 INFO L226 Difference]: Without dead ends: 1175 [2024-11-13 14:08:25,753 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=694, Invalid=14806, Unknown=0, NotChecked=0, Total=15500 [2024-11-13 14:08:25,753 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 289 mSDsluCounter, 4184 mSDsCounter, 0 mSdLazyCounter, 7406 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 4253 SdHoareTripleChecker+Invalid, 7436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 7406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:08:25,754 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 4253 Invalid, 7436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 7406 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-11-13 14:08:25,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2024-11-13 14:08:25,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 635. [2024-11-13 14:08:25,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 631 states have (on average 1.1822503961965134) internal successors, (746), 634 states have internal predecessors, (746), 0 states have call successors, (0), 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 14:08:25,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 746 transitions. [2024-11-13 14:08:25,766 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 746 transitions. Word has length 69 [2024-11-13 14:08:25,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:08:25,766 INFO L471 AbstractCegarLoop]: Abstraction has 635 states and 746 transitions. [2024-11-13 14:08:25,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.4074074074074074) internal successors, (195), 81 states have internal predecessors, (195), 0 states have call successors, (0), 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 14:08:25,766 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 746 transitions. [2024-11-13 14:08:25,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-13 14:08:25,768 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:08:25,768 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:08:25,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-13 14:08:25,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-11-13 14:08:25,969 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:08:25,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:08:25,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1774423742, now seen corresponding path program 13 times [2024-11-13 14:08:25,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:08:25,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471054274] [2024-11-13 14:08:25,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:08:25,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:08:25,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:08:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 10 proven. 266 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:08:27,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:08:27,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471054274] [2024-11-13 14:08:27,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471054274] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:08:27,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353752557] [2024-11-13 14:08:27,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 14:08:27,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:08:27,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:08:27,027 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:08:27,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-13 14:08:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:08:27,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-11-13 14:08:27,276 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:08:27,703 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 14:08:27,786 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 10 proven. 266 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:08:27,786 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:08:27,843 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 14:08:27,845 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 14:08:27,980 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 10 proven. 266 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:08:27,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353752557] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:08:27,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:08:27,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 48 [2024-11-13 14:08:27,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752475536] [2024-11-13 14:08:27,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:08:27,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-13 14:08:27,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:08:27,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-13 14:08:27,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2024-11-13 14:08:27,981 INFO L87 Difference]: Start difference. First operand 635 states and 746 transitions. Second operand has 48 states, 48 states have (on average 2.5208333333333335) internal successors, (121), 48 states have internal predecessors, (121), 0 states have call successors, (0), 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 14:08:30,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:08:30,138 INFO L93 Difference]: Finished difference Result 971 states and 1154 transitions. [2024-11-13 14:08:30,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-13 14:08:30,138 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.5208333333333335) internal successors, (121), 48 states have internal predecessors, (121), 0 states have call successors, (0), 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 14:08:30,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:08:30,140 INFO L225 Difference]: With dead ends: 971 [2024-11-13 14:08:30,140 INFO L226 Difference]: Without dead ends: 944 [2024-11-13 14:08:30,140 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=278, Invalid=4834, Unknown=0, NotChecked=0, Total=5112 [2024-11-13 14:08:30,140 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 103 mSDsluCounter, 3125 mSDsCounter, 0 mSdLazyCounter, 3135 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 3215 SdHoareTripleChecker+Invalid, 3146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-13 14:08:30,140 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 3215 Invalid, 3146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3135 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-13 14:08:30,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2024-11-13 14:08:30,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 674. [2024-11-13 14:08:30,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 670 states have (on average 1.1791044776119404) internal successors, (790), 673 states have internal predecessors, (790), 0 states have call successors, (0), 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 14:08:30,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 790 transitions. [2024-11-13 14:08:30,146 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 790 transitions. Word has length 72 [2024-11-13 14:08:30,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:08:30,146 INFO L471 AbstractCegarLoop]: Abstraction has 674 states and 790 transitions. [2024-11-13 14:08:30,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.5208333333333335) internal successors, (121), 48 states have internal predecessors, (121), 0 states have call successors, (0), 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 14:08:30,146 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 790 transitions. [2024-11-13 14:08:30,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-13 14:08:30,148 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:08:30,148 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:08:30,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-13 14:08:30,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-11-13 14:08:30,348 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:08:30,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:08:30,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1185278559, now seen corresponding path program 3 times [2024-11-13 14:08:30,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:08:30,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985434970] [2024-11-13 14:08:30,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:08:30,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:08:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:08:31,407 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 14:08:31,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:08:31,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985434970] [2024-11-13 14:08:31,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985434970] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:08:31,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767968510] [2024-11-13 14:08:31,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:08:31,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:08:31,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:08:31,409 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:08:31,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-13 14:08:31,673 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 14:08:31,673 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:08:31,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-11-13 14:08:31,679 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:08:31,880 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 14:08:32,010 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 14:08:33,982 INFO L349 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2024-11-13 14:08:33,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 39 [2024-11-13 14:08:34,131 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-13 14:08:34,131 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:08:36,404 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 22 treesize of output 14 [2024-11-13 14:08:36,677 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 14:08:36,683 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 14:08:36,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 45 [2024-11-13 14:08:37,166 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-13 14:08:37,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767968510] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:08:37,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:08:37,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26, 24] total 70 [2024-11-13 14:08:37,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395362870] [2024-11-13 14:08:37,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:08:37,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-13 14:08:37,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:08:37,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-13 14:08:37,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=4500, Unknown=0, NotChecked=0, Total=4830 [2024-11-13 14:08:37,168 INFO L87 Difference]: Start difference. First operand 674 states and 790 transitions. Second operand has 70 states, 70 states have (on average 2.342857142857143) internal successors, (164), 70 states have internal predecessors, (164), 0 states have call successors, (0), 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 14:08:48,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:08:48,754 INFO L93 Difference]: Finished difference Result 1461 states and 1726 transitions. [2024-11-13 14:08:48,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2024-11-13 14:08:48,755 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.342857142857143) internal successors, (164), 70 states have internal predecessors, (164), 0 states have call successors, (0), 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 73 [2024-11-13 14:08:48,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:08:48,757 INFO L225 Difference]: With dead ends: 1461 [2024-11-13 14:08:48,757 INFO L226 Difference]: Without dead ends: 1461 [2024-11-13 14:08:48,758 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5941 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=2831, Invalid=22609, Unknown=0, NotChecked=0, Total=25440 [2024-11-13 14:08:48,758 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 2584 mSDsluCounter, 2399 mSDsCounter, 0 mSdLazyCounter, 4297 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2584 SdHoareTripleChecker+Valid, 2460 SdHoareTripleChecker+Invalid, 4352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 4297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:08:48,758 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2584 Valid, 2460 Invalid, 4352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 4297 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-13 14:08:48,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2024-11-13 14:08:48,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1314. [2024-11-13 14:08:48,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1310 states have (on average 1.214503816793893) internal successors, (1591), 1313 states have internal predecessors, (1591), 0 states have call successors, (0), 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 14:08:48,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 1591 transitions. [2024-11-13 14:08:48,768 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 1591 transitions. Word has length 73 [2024-11-13 14:08:48,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:08:48,769 INFO L471 AbstractCegarLoop]: Abstraction has 1314 states and 1591 transitions. [2024-11-13 14:08:48,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.342857142857143) internal successors, (164), 70 states have internal predecessors, (164), 0 states have call successors, (0), 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 14:08:48,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 1591 transitions. [2024-11-13 14:08:48,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-13 14:08:48,770 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:08:48,770 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:08:48,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-11-13 14:08:48,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-11-13 14:08:48,971 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:08:48,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:08:48,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1534517588, now seen corresponding path program 14 times [2024-11-13 14:08:48,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:08:48,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750252821] [2024-11-13 14:08:48,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:08:48,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:08:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:08:49,904 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 155 proven. 155 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:08:49,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:08:49,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750252821] [2024-11-13 14:08:49,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750252821] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:08:49,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916030762] [2024-11-13 14:08:49,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:08:49,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:08:49,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:08:49,906 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:08:49,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-13 14:08:50,155 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:08:50,155 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:08:50,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-11-13 14:08:50,161 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:08:50,166 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 14:08:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 176 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:08:50,751 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:08:52,257 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 176 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:08:52,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916030762] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:08:52,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:08:52,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 70 [2024-11-13 14:08:52,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282534435] [2024-11-13 14:08:52,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:08:52,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-13 14:08:52,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:08:52,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-13 14:08:52,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=4227, Unknown=0, NotChecked=0, Total=4970 [2024-11-13 14:08:52,260 INFO L87 Difference]: Start difference. First operand 1314 states and 1591 transitions. Second operand has 71 states, 70 states have (on average 2.7714285714285714) internal successors, (194), 71 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 14:08:54,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:08:54,130 INFO L93 Difference]: Finished difference Result 2035 states and 2504 transitions. [2024-11-13 14:08:54,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-13 14:08:54,131 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 2.7714285714285714) internal successors, (194), 71 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 75 [2024-11-13 14:08:54,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:08:54,135 INFO L225 Difference]: With dead ends: 2035 [2024-11-13 14:08:54,135 INFO L226 Difference]: Without dead ends: 2035 [2024-11-13 14:08:54,135 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2507 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=991, Invalid=6319, Unknown=0, NotChecked=0, Total=7310 [2024-11-13 14:08:54,136 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 190 mSDsluCounter, 1477 mSDsCounter, 0 mSdLazyCounter, 2505 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 1558 SdHoareTripleChecker+Invalid, 2506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-13 14:08:54,136 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 1558 Invalid, 2506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2505 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-13 14:08:54,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2024-11-13 14:08:54,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 1322. [2024-11-13 14:08:54,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1318 states have (on average 1.2154779969650986) internal successors, (1602), 1321 states have internal predecessors, (1602), 0 states have call successors, (0), 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 14:08:54,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 1602 transitions. [2024-11-13 14:08:54,148 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 1602 transitions. Word has length 75 [2024-11-13 14:08:54,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:08:54,148 INFO L471 AbstractCegarLoop]: Abstraction has 1322 states and 1602 transitions. [2024-11-13 14:08:54,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 2.7714285714285714) internal successors, (194), 71 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 14:08:54,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 1602 transitions. [2024-11-13 14:08:54,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-13 14:08:54,149 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:08:54,149 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:08:54,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-11-13 14:08:54,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-11-13 14:08:54,350 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:08:54,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:08:54,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1497619163, now seen corresponding path program 15 times [2024-11-13 14:08:54,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:08:54,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108489570] [2024-11-13 14:08:54,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:08:54,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:08:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:08:55,255 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 11 proven. 320 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:08:55,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:08:55,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108489570] [2024-11-13 14:08:55,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108489570] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:08:55,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479507270] [2024-11-13 14:08:55,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:08:55,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:08:55,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:08:55,260 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:08:55,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-13 14:08:55,717 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-13 14:08:55,717 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:08:55,720 INFO L255 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 102 conjuncts are in the unsatisfiable core [2024-11-13 14:08:55,724 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:08:56,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-13 14:08:58,601 INFO L349 Elim1Store]: treesize reduction 20, result has 82.8 percent of original size [2024-11-13 14:08:58,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 66 treesize of output 122 [2024-11-13 14:08:58,673 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-13 14:08:58,938 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 164 proven. 127 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-13 14:08:58,938 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:09:51,951 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 14:09:51,998 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:09:51,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 137 treesize of output 165 [2024-11-13 14:09:52,010 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 14:09:53,116 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-13 14:09:53,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479507270] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:09:53,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:09:53,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 94 [2024-11-13 14:09:53,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416865264] [2024-11-13 14:09:53,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:09:53,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2024-11-13 14:09:53,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:53,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2024-11-13 14:09:53,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=687, Invalid=8044, Unknown=11, NotChecked=0, Total=8742 [2024-11-13 14:09:53,119 INFO L87 Difference]: Start difference. First operand 1322 states and 1602 transitions. Second operand has 94 states, 94 states have (on average 2.0) internal successors, (188), 94 states have internal predecessors, (188), 0 states have call successors, (0), 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 14:10:07,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 14:10:14,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 14:10:34,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 14:10:39,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 14:11:06,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:11:06,649 INFO L93 Difference]: Finished difference Result 3040 states and 3781 transitions. [2024-11-13 14:11:06,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2024-11-13 14:11:06,650 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0) internal successors, (188), 94 states have internal predecessors, (188), 0 states have call successors, (0), 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 14:11:06,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:11:06,657 INFO L225 Difference]: With dead ends: 3040 [2024-11-13 14:11:06,658 INFO L226 Difference]: Without dead ends: 3011 [2024-11-13 14:11:06,659 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10892 ImplicationChecksByTransitivity, 111.6s TimeCoverageRelationStatistics Valid=3694, Invalid=32199, Unknown=17, NotChecked=0, Total=35910 [2024-11-13 14:11:06,659 INFO L432 NwaCegarLoop]: 97 mSDtfsCounter, 333 mSDsluCounter, 2964 mSDsCounter, 0 mSdLazyCounter, 5389 mSolverCounterSat, 60 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 3061 SdHoareTripleChecker+Invalid, 5453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 5389 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.8s IncrementalHoareTripleChecker+Time [2024-11-13 14:11:06,661 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 3061 Invalid, 5453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 5389 Invalid, 4 Unknown, 0 Unchecked, 17.8s Time] [2024-11-13 14:11:06,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3011 states. [2024-11-13 14:11:06,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3011 to 1427. [2024-11-13 14:11:06,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1427 states, 1423 states have (on average 1.2178496134926213) internal successors, (1733), 1426 states have internal predecessors, (1733), 0 states have call successors, (0), 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 14:11:06,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 1733 transitions. [2024-11-13 14:11:06,689 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 1733 transitions. Word has length 77 [2024-11-13 14:11:06,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:11:06,689 INFO L471 AbstractCegarLoop]: Abstraction has 1427 states and 1733 transitions. [2024-11-13 14:11:06,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0) internal successors, (188), 94 states have internal predecessors, (188), 0 states have call successors, (0), 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 14:11:06,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 1733 transitions. [2024-11-13 14:11:06,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-13 14:11:06,691 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:11:06,691 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:11:06,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-13 14:11:06,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:11:06,892 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:11:06,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:11:06,893 INFO L85 PathProgramCache]: Analyzing trace with hash 173515330, now seen corresponding path program 4 times [2024-11-13 14:11:06,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:11:06,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257804818] [2024-11-13 14:11:06,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:11:06,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:11:06,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:11:07,211 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-11-13 14:11:07,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:11:07,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257804818] [2024-11-13 14:11:07,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257804818] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:11:07,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217775940] [2024-11-13 14:11:07,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:11:07,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:11:07,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:11:07,214 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:11:07,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-13 14:11:07,499 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:11:07,499 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:11:07,501 INFO L255 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 123 conjuncts are in the unsatisfiable core [2024-11-13 14:11:07,505 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:11:07,701 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 14:11:09,171 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 14:11:10,505 INFO L349 Elim1Store]: treesize reduction 12, result has 72.7 percent of original size [2024-11-13 14:11:10,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 50 [2024-11-13 14:11:10,742 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-13 14:11:10,742 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:11:13,005 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:11:13,005 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 22 treesize of output 25 [2024-11-13 14:11:13,810 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 14:11:13,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 77 [2024-11-13 14:11:14,646 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 14:11:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-13 14:11:14,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217775940] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:11:14,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:11:14,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 28, 25] total 62 [2024-11-13 14:11:14,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728939226] [2024-11-13 14:11:14,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:11:14,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-13 14:11:14,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:11:14,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-13 14:11:14,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=3535, Unknown=0, NotChecked=0, Total=3782 [2024-11-13 14:11:14,677 INFO L87 Difference]: Start difference. First operand 1427 states and 1733 transitions. Second operand has 62 states, 62 states have (on average 2.7903225806451615) internal successors, (173), 62 states have internal predecessors, (173), 0 states have call successors, (0), 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 14:11:25,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:11:25,736 INFO L93 Difference]: Finished difference Result 2083 states and 2469 transitions. [2024-11-13 14:11:25,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-13 14:11:25,737 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.7903225806451615) internal successors, (173), 62 states have internal predecessors, (173), 0 states have call successors, (0), 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 79 [2024-11-13 14:11:25,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:11:25,740 INFO L225 Difference]: With dead ends: 2083 [2024-11-13 14:11:25,740 INFO L226 Difference]: Without dead ends: 1205 [2024-11-13 14:11:25,740 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2384 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=1240, Invalid=10970, Unknown=0, NotChecked=0, Total=12210 [2024-11-13 14:11:25,740 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 416 mSDsluCounter, 1633 mSDsCounter, 0 mSdLazyCounter, 2994 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 1692 SdHoareTripleChecker+Invalid, 3007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-13 14:11:25,740 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 1692 Invalid, 3007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2994 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-11-13 14:11:25,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2024-11-13 14:11:25,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 902. [2024-11-13 14:11:25,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 899 states have (on average 1.153503893214683) internal successors, (1037), 901 states have internal predecessors, (1037), 0 states have call successors, (0), 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 14:11:25,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1037 transitions. [2024-11-13 14:11:25,754 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1037 transitions. Word has length 79 [2024-11-13 14:11:25,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:11:25,754 INFO L471 AbstractCegarLoop]: Abstraction has 902 states and 1037 transitions. [2024-11-13 14:11:25,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.7903225806451615) internal successors, (173), 62 states have internal predecessors, (173), 0 states have call successors, (0), 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 14:11:25,754 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1037 transitions. [2024-11-13 14:11:25,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-13 14:11:25,756 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:11:25,756 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:11:25,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-13 14:11:25,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:11:25,956 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:11:25,956 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:11:25,957 INFO L85 PathProgramCache]: Analyzing trace with hash -90520356, now seen corresponding path program 2 times [2024-11-13 14:11:25,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:11:25,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592861750] [2024-11-13 14:11:25,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:11:25,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:11:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:11:26,669 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 26 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 14:11:26,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:11:26,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592861750] [2024-11-13 14:11:26,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592861750] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:11:26,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398858602] [2024-11-13 14:11:26,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:11:26,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:11:26,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:11:26,672 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:11:26,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-13 14:11:26,951 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:11:26,951 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:11:26,953 INFO L255 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-13 14:11:26,956 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:11:26,960 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 14:11:27,479 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 14:11:27,480 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:11:28,512 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 14:11:28,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398858602] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:11:28,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:11:28,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 42 [2024-11-13 14:11:28,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338576290] [2024-11-13 14:11:28,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:11:28,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-13 14:11:28,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:11:28,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-13 14:11:28,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1597, Unknown=0, NotChecked=0, Total=1806 [2024-11-13 14:11:28,514 INFO L87 Difference]: Start difference. First operand 902 states and 1037 transitions. Second operand has 43 states, 42 states have (on average 4.214285714285714) internal successors, (177), 43 states have internal predecessors, (177), 0 states have call successors, (0), 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 14:11:30,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:11:30,211 INFO L93 Difference]: Finished difference Result 1001 states and 1152 transitions. [2024-11-13 14:11:30,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-13 14:11:30,212 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 4.214285714285714) internal successors, (177), 43 states have internal predecessors, (177), 0 states have call successors, (0), 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 14:11:30,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:11:30,214 INFO L225 Difference]: With dead ends: 1001 [2024-11-13 14:11:30,214 INFO L226 Difference]: Without dead ends: 1001 [2024-11-13 14:11:30,214 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=567, Invalid=3723, Unknown=0, NotChecked=0, Total=4290 [2024-11-13 14:11:30,214 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 224 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-13 14:11:30,214 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 870 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-13 14:11:30,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2024-11-13 14:11:30,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 954. [2024-11-13 14:11:30,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 951 states have (on average 1.1619348054679286) internal successors, (1105), 953 states have internal predecessors, (1105), 0 states have call successors, (0), 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 14:11:30,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1105 transitions. [2024-11-13 14:11:30,223 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1105 transitions. Word has length 86 [2024-11-13 14:11:30,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:11:30,223 INFO L471 AbstractCegarLoop]: Abstraction has 954 states and 1105 transitions. [2024-11-13 14:11:30,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 4.214285714285714) internal successors, (177), 43 states have internal predecessors, (177), 0 states have call successors, (0), 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 14:11:30,223 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1105 transitions. [2024-11-13 14:11:30,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-13 14:11:30,224 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:11:30,224 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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 14:11:30,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-13 14:11:30,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:11:30,425 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:11:30,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:11:30,425 INFO L85 PathProgramCache]: Analyzing trace with hash -204365218, now seen corresponding path program 2 times [2024-11-13 14:11:30,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:11:30,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548027384] [2024-11-13 14:11:30,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:11:30,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:11:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:11:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 14:11:31,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:11:31,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548027384] [2024-11-13 14:11:31,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548027384] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:11:31,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722985933] [2024-11-13 14:11:31,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:11:31,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:11:31,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:11:31,283 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:11:31,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-13 14:11:31,536 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 14:11:31,536 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:11:31,537 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 14:11:31,539 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:11:31,636 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-13 14:11:31,636 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:11:31,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722985933] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:11:31,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:11:31,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 21 [2024-11-13 14:11:31,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183522922] [2024-11-13 14:11:31,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:11:31,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:11:31,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:11:31,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:11:31,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2024-11-13 14:11:31,638 INFO L87 Difference]: Start difference. First operand 954 states and 1105 transitions. Second operand has 5 states, 4 states have (on average 11.75) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 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 14:11:31,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:11:31,701 INFO L93 Difference]: Finished difference Result 956 states and 1104 transitions. [2024-11-13 14:11:31,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:11:31,701 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 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 14:11:31,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:11:31,703 INFO L225 Difference]: With dead ends: 956 [2024-11-13 14:11:31,703 INFO L226 Difference]: Without dead ends: 953 [2024-11-13 14:11:31,703 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2024-11-13 14:11:31,704 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 8 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:11:31,704 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 163 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:11:31,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2024-11-13 14:11:31,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 941. [2024-11-13 14:11:31,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 939 states have (on average 1.1586794462193823) internal successors, (1088), 940 states have internal predecessors, (1088), 0 states have call successors, (0), 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 14:11:31,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 1088 transitions. [2024-11-13 14:11:31,714 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 1088 transitions. Word has length 90 [2024-11-13 14:11:31,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:11:31,715 INFO L471 AbstractCegarLoop]: Abstraction has 941 states and 1088 transitions. [2024-11-13 14:11:31,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 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 14:11:31,715 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 1088 transitions. [2024-11-13 14:11:31,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-13 14:11:31,716 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:11:31,717 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:11:31,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-13 14:11:31,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2024-11-13 14:11:31,917 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:11:31,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:11:31,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1013794961, now seen corresponding path program 16 times [2024-11-13 14:11:31,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:11:31,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019694797] [2024-11-13 14:11:31,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:11:31,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:11:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:11:35,025 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 0 proven. 536 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:11:35,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:11:35,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019694797] [2024-11-13 14:11:35,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019694797] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:11:35,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682564836] [2024-11-13 14:11:35,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:11:35,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:11:35,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:11:35,027 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:11:35,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-13 14:11:35,372 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:11:35,372 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:11:35,376 INFO L255 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 139 conjuncts are in the unsatisfiable core [2024-11-13 14:11:35,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:11:36,763 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 14:14:05,131 INFO L349 Elim1Store]: treesize reduction 53, result has 49.5 percent of original size [2024-11-13 14:14:05,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 138 treesize of output 106 [2024-11-13 14:14:05,139 WARN L672 sPolynomialRelations]: Constructing 4096(two to the power of 12 dual juncts. [2024-11-13 14:14:05,547 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 134 proven. 258 refuted. 119 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-13 14:14:05,547 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:14:12,880 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 194 treesize of output 168 [2024-11-13 14:14:12,892 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:14:12,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 194 treesize of output 144 [2024-11-13 14:14:16,465 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 264 proven. 247 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-13 14:14:16,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682564836] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:14:16,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:14:16,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 46, 46] total 126 [2024-11-13 14:14:16,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426276952] [2024-11-13 14:14:16,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:14:16,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2024-11-13 14:14:16,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:14:16,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2024-11-13 14:14:16,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=930, Invalid=14646, Unknown=174, NotChecked=0, Total=15750 [2024-11-13 14:14:16,468 INFO L87 Difference]: Start difference. First operand 941 states and 1088 transitions. Second operand has 126 states, 126 states have (on average 1.9206349206349207) internal successors, (242), 126 states have internal predecessors, (242), 0 states have call successors, (0), 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 14:14:24,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 14:14:27,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 14:14:28,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 14:15:13,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:15:13,082 INFO L93 Difference]: Finished difference Result 1456 states and 1728 transitions. [2024-11-13 14:15:13,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-13 14:15:13,083 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.9206349206349207) internal successors, (242), 126 states have internal predecessors, (242), 0 states have call successors, (0), 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 92 [2024-11-13 14:15:13,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:15:13,085 INFO L225 Difference]: With dead ends: 1456 [2024-11-13 14:15:13,085 INFO L226 Difference]: Without dead ends: 1425 [2024-11-13 14:15:13,086 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 204.6s TimeCoverageRelationStatistics Valid=2428, Invalid=29257, Unknown=177, NotChecked=0, Total=31862 [2024-11-13 14:15:13,087 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 529 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 3628 mSolverCounterSat, 48 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 1613 SdHoareTripleChecker+Invalid, 3680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 3628 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2024-11-13 14:15:13,087 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 1613 Invalid, 3680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 3628 Invalid, 4 Unknown, 0 Unchecked, 12.6s Time] [2024-11-13 14:15:13,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2024-11-13 14:15:13,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1004. [2024-11-13 14:15:13,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1002 states have (on average 1.154690618762475) internal successors, (1157), 1003 states have internal predecessors, (1157), 0 states have call successors, (0), 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 14:15:13,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1157 transitions. [2024-11-13 14:15:13,099 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1157 transitions. Word has length 92 [2024-11-13 14:15:13,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:15:13,099 INFO L471 AbstractCegarLoop]: Abstraction has 1004 states and 1157 transitions. [2024-11-13 14:15:13,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.9206349206349207) internal successors, (242), 126 states have internal predecessors, (242), 0 states have call successors, (0), 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 14:15:13,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1157 transitions. [2024-11-13 14:15:13,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-13 14:15:13,101 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:15:13,101 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:15:13,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-13 14:15:13,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2024-11-13 14:15:13,301 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:15:13,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:15:13,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1040769797, now seen corresponding path program 17 times [2024-11-13 14:15:13,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:15:13,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793102210] [2024-11-13 14:15:13,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:15:13,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:15:13,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:15:16,584 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:15:16,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:15:16,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793102210] [2024-11-13 14:15:16,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793102210] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:15:16,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24766903] [2024-11-13 14:15:16,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 14:15:16,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:15:16,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:15:16,588 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:15:16,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-13 14:15:17,049 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2024-11-13 14:15:17,049 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:15:17,053 INFO L255 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 112 conjuncts are in the unsatisfiable core [2024-11-13 14:15:17,056 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:15:18,388 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 13 treesize of output 9 [2024-11-13 14:15:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 117 proven. 443 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-13 14:15:20,070 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:15:20,145 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 14:15:20,148 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 14:15:20,492 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 117 proven. 443 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-13 14:15:20,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24766903] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:15:20,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:15:20,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 35, 35] total 77 [2024-11-13 14:15:20,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465465974] [2024-11-13 14:15:20,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:15:20,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-13 14:15:20,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:15:20,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-13 14:15:20,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=5670, Unknown=0, NotChecked=0, Total=5852 [2024-11-13 14:15:20,495 INFO L87 Difference]: Start difference. First operand 1004 states and 1157 transitions. Second operand has 77 states, 77 states have (on average 2.3896103896103895) internal successors, (184), 77 states have internal predecessors, (184), 0 states have call successors, (0), 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 14:15:33,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:15:33,505 INFO L93 Difference]: Finished difference Result 1817 states and 2172 transitions. [2024-11-13 14:15:33,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-11-13 14:15:33,506 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.3896103896103895) internal successors, (184), 77 states have internal predecessors, (184), 0 states have call successors, (0), 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 95 [2024-11-13 14:15:33,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:15:33,510 INFO L225 Difference]: With dead ends: 1817 [2024-11-13 14:15:33,510 INFO L226 Difference]: Without dead ends: 1784 [2024-11-13 14:15:33,511 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3574 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=779, Invalid=17581, Unknown=0, NotChecked=0, Total=18360 [2024-11-13 14:15:33,511 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 194 mSDsluCounter, 3856 mSDsCounter, 0 mSdLazyCounter, 8363 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 3929 SdHoareTripleChecker+Invalid, 8405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 8363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2024-11-13 14:15:33,511 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 3929 Invalid, 8405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 8363 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2024-11-13 14:15:33,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2024-11-13 14:15:33,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1067. [2024-11-13 14:15:33,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1065 states have (on average 1.1511737089201879) internal successors, (1226), 1066 states have internal predecessors, (1226), 0 states have call successors, (0), 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 14:15:33,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1226 transitions. [2024-11-13 14:15:33,525 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1226 transitions. Word has length 95 [2024-11-13 14:15:33,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:15:33,525 INFO L471 AbstractCegarLoop]: Abstraction has 1067 states and 1226 transitions. [2024-11-13 14:15:33,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.3896103896103895) internal successors, (184), 77 states have internal predecessors, (184), 0 states have call successors, (0), 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 14:15:33,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1226 transitions. [2024-11-13 14:15:33,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-13 14:15:33,526 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:15:33,526 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:15:33,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-11-13 14:15:33,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2024-11-13 14:15:33,727 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:15:33,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:15:33,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1000540079, now seen corresponding path program 18 times [2024-11-13 14:15:33,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:15:33,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991204150] [2024-11-13 14:15:33,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:15:33,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:15:33,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:15:37,580 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 0 proven. 619 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:15:37,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:15:37,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991204150] [2024-11-13 14:15:37,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991204150] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:15:37,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077722338] [2024-11-13 14:15:37,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 14:15:37,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:15:37,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:15:37,583 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:15:37,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-13 14:15:39,316 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2024-11-13 14:15:39,316 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:15:39,322 INFO L255 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 128 conjuncts are in the unsatisfiable core [2024-11-13 14:15:39,326 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:15:41,849 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 14:15:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 98 proven. 512 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 14:15:44,158 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:15:46,607 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 14:15:46,610 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 14:15:49,569 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 98 proven. 512 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 14:15:49,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077722338] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:15:49,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:15:49,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 38, 37] total 113 [2024-11-13 14:15:49,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838560968] [2024-11-13 14:15:49,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:15:49,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2024-11-13 14:15:49,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:15:49,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2024-11-13 14:15:49,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=12344, Unknown=0, NotChecked=0, Total=12656 [2024-11-13 14:15:49,573 INFO L87 Difference]: Start difference. First operand 1067 states and 1226 transitions. Second operand has 113 states, 113 states have (on average 2.424778761061947) internal successors, (274), 113 states have internal predecessors, (274), 0 states have call successors, (0), 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 14:16:14,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:16:14,415 INFO L93 Difference]: Finished difference Result 1942 states and 2327 transitions. [2024-11-13 14:16:14,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-13 14:16:14,416 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.424778761061947) internal successors, (274), 113 states have internal predecessors, (274), 0 states have call successors, (0), 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 98 [2024-11-13 14:16:14,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:16:14,421 INFO L225 Difference]: With dead ends: 1942 [2024-11-13 14:16:14,422 INFO L226 Difference]: Without dead ends: 1907 [2024-11-13 14:16:14,423 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4882 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=1068, Invalid=30084, Unknown=0, NotChecked=0, Total=31152 [2024-11-13 14:16:14,424 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 307 mSDsluCounter, 4680 mSDsCounter, 0 mSdLazyCounter, 11035 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 4755 SdHoareTripleChecker+Invalid, 11079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 11035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:16:14,424 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 4755 Invalid, 11079 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [44 Valid, 11035 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2024-11-13 14:16:14,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2024-11-13 14:16:14,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1130. [2024-11-13 14:16:14,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1128 states have (on average 1.1480496453900708) internal successors, (1295), 1129 states have internal predecessors, (1295), 0 states have call successors, (0), 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 14:16:14,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 1295 transitions. [2024-11-13 14:16:14,447 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 1295 transitions. Word has length 98 [2024-11-13 14:16:14,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:16:14,448 INFO L471 AbstractCegarLoop]: Abstraction has 1130 states and 1295 transitions. [2024-11-13 14:16:14,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.424778761061947) internal successors, (274), 113 states have internal predecessors, (274), 0 states have call successors, (0), 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 14:16:14,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 1295 transitions. [2024-11-13 14:16:14,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-13 14:16:14,450 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:16:14,450 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 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 14:16:14,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-13 14:16:14,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-11-13 14:16:14,651 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:16:14,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:16:14,651 INFO L85 PathProgramCache]: Analyzing trace with hash -313213700, now seen corresponding path program 3 times [2024-11-13 14:16:14,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:16:14,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689503425] [2024-11-13 14:16:14,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:16:14,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:16:14,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:16:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 40 proven. 62 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-13 14:16:15,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:16:15,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689503425] [2024-11-13 14:16:15,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689503425] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:16:15,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748815470] [2024-11-13 14:16:15,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:16:15,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:16:15,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:16:15,188 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:16:15,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-13 14:16:15,659 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-13 14:16:15,659 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:16:15,664 INFO L255 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 168 conjuncts are in the unsatisfiable core [2024-11-13 14:16:15,668 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:16:15,831 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 8 treesize of output 1 [2024-11-13 14:16:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 19 proven. 86 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-13 14:16:17,351 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:16:17,626 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 14:16:18,638 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 19 proven. 86 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-13 14:16:18,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748815470] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:16:18,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:16:18,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 26, 19] total 54 [2024-11-13 14:16:18,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532724539] [2024-11-13 14:16:18,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:16:18,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-13 14:16:18,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:16:18,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-13 14:16:18,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2709, Unknown=0, NotChecked=0, Total=2862 [2024-11-13 14:16:18,640 INFO L87 Difference]: Start difference. First operand 1130 states and 1295 transitions. Second operand has 54 states, 54 states have (on average 3.740740740740741) internal successors, (202), 54 states have internal predecessors, (202), 0 states have call successors, (0), 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 14:16:22,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:16:22,866 INFO L93 Difference]: Finished difference Result 1534 states and 1771 transitions. [2024-11-13 14:16:22,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-13 14:16:22,866 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.740740740740741) internal successors, (202), 54 states have internal predecessors, (202), 0 states have call successors, (0), 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 14:16:22,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:16:22,869 INFO L225 Difference]: With dead ends: 1534 [2024-11-13 14:16:22,870 INFO L226 Difference]: Without dead ends: 1135 [2024-11-13 14:16:22,870 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1706 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=847, Invalid=9253, Unknown=0, NotChecked=0, Total=10100 [2024-11-13 14:16:22,871 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 1166 mSDsluCounter, 1975 mSDsCounter, 0 mSdLazyCounter, 2119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1166 SdHoareTripleChecker+Valid, 2040 SdHoareTripleChecker+Invalid, 2121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-13 14:16:22,871 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1166 Valid, 2040 Invalid, 2121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2119 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-13 14:16:22,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2024-11-13 14:16:22,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 1133. [2024-11-13 14:16:22,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1131 states have (on average 1.1396993810786915) internal successors, (1289), 1132 states have internal predecessors, (1289), 0 states have call successors, (0), 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 14:16:22,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 1289 transitions. [2024-11-13 14:16:22,883 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 1289 transitions. Word has length 100 [2024-11-13 14:16:22,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:16:22,883 INFO L471 AbstractCegarLoop]: Abstraction has 1133 states and 1289 transitions. [2024-11-13 14:16:22,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.740740740740741) internal successors, (202), 54 states have internal predecessors, (202), 0 states have call successors, (0), 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 14:16:22,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 1289 transitions. [2024-11-13 14:16:22,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-13 14:16:22,884 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:16:22,884 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:16:22,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-11-13 14:16:23,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-11-13 14:16:23,085 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:16:23,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:16:23,085 INFO L85 PathProgramCache]: Analyzing trace with hash -812886725, now seen corresponding path program 19 times [2024-11-13 14:16:23,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:16:23,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154592652] [2024-11-13 14:16:23,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:16:23,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:16:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:16:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 665 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:16:27,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:16:27,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154592652] [2024-11-13 14:16:27,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154592652] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:16:27,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344383747] [2024-11-13 14:16:27,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 14:16:27,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:16:27,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:16:27,277 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:16:27,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-13 14:16:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:16:27,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 124 conjuncts are in the unsatisfiable core [2024-11-13 14:16:27,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:16:29,665 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 14:16:32,168 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 75 proven. 586 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:16:32,169 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:16:32,278 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 14:16:32,281 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 14:16:32,808 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 75 proven. 586 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:16:32,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344383747] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:16:32,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:16:32,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 39, 39] total 83 [2024-11-13 14:16:32,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665198577] [2024-11-13 14:16:32,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:16:32,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-13 14:16:32,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:16:32,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-13 14:16:32,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=6629, Unknown=0, NotChecked=0, Total=6806 [2024-11-13 14:16:32,810 INFO L87 Difference]: Start difference. First operand 1133 states and 1289 transitions. Second operand has 83 states, 83 states have (on average 2.4096385542168677) internal successors, (200), 83 states have internal predecessors, (200), 0 states have call successors, (0), 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 14:17:00,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:17:00,745 INFO L93 Difference]: Finished difference Result 2016 states and 2398 transitions. [2024-11-13 14:17:00,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-11-13 14:17:00,746 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.4096385542168677) internal successors, (200), 83 states have internal predecessors, (200), 0 states have call successors, (0), 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 101 [2024-11-13 14:17:00,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:17:00,750 INFO L225 Difference]: With dead ends: 2016 [2024-11-13 14:17:00,751 INFO L226 Difference]: Without dead ends: 1979 [2024-11-13 14:17:00,752 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2828 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=894, Invalid=21756, Unknown=0, NotChecked=0, Total=22650 [2024-11-13 14:17:00,752 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 302 mSDsluCounter, 5304 mSDsCounter, 0 mSdLazyCounter, 11793 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 5379 SdHoareTripleChecker+Invalid, 11840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 11793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2024-11-13 14:17:00,753 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 5379 Invalid, 11840 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [47 Valid, 11793 Invalid, 0 Unknown, 0 Unchecked, 12.5s Time] [2024-11-13 14:17:00,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2024-11-13 14:17:00,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1202. [2024-11-13 14:17:00,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 1200 states have (on average 1.1366666666666667) internal successors, (1364), 1201 states have internal predecessors, (1364), 0 states have call successors, (0), 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 14:17:00,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 1364 transitions. [2024-11-13 14:17:00,769 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 1364 transitions. Word has length 101 [2024-11-13 14:17:00,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:17:00,770 INFO L471 AbstractCegarLoop]: Abstraction has 1202 states and 1364 transitions. [2024-11-13 14:17:00,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.4096385542168677) internal successors, (200), 83 states have internal predecessors, (200), 0 states have call successors, (0), 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 14:17:00,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 1364 transitions. [2024-11-13 14:17:00,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-13 14:17:00,772 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:17:00,772 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:17:00,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-11-13 14:17:00,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:17:00,972 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:17:00,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:17:00,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1815730193, now seen corresponding path program 20 times [2024-11-13 14:17:00,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:17:00,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320251784] [2024-11-13 14:17:00,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:17:00,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:17:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:17:05,085 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:17:05,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:17:05,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320251784] [2024-11-13 14:17:05,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320251784] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:17:05,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423658500] [2024-11-13 14:17:05,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:17:05,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:17:05,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:17:05,088 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:17:05,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-13 14:17:05,535 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:17:05,535 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:17:05,540 INFO L255 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 128 conjuncts are in the unsatisfiable core [2024-11-13 14:17:05,545 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:17:07,725 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 14:17:10,186 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 48 proven. 665 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 14:17:10,186 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:17:10,275 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 14:17:10,277 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 14:17:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 48 proven. 665 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 14:17:10,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423658500] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:17:10,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:17:10,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 41, 41] total 86 [2024-11-13 14:17:10,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900560389] [2024-11-13 14:17:10,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:17:10,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-11-13 14:17:10,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:17:10,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-11-13 14:17:10,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=7108, Unknown=0, NotChecked=0, Total=7310 [2024-11-13 14:17:10,796 INFO L87 Difference]: Start difference. First operand 1202 states and 1364 transitions. Second operand has 86 states, 86 states have (on average 2.4186046511627906) internal successors, (208), 86 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 14:17:29,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:17:29,032 INFO L93 Difference]: Finished difference Result 2153 states and 2568 transitions. [2024-11-13 14:17:29,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-11-13 14:17:29,033 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.4186046511627906) internal successors, (208), 86 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 104 [2024-11-13 14:17:29,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:17:29,036 INFO L225 Difference]: With dead ends: 2153 [2024-11-13 14:17:29,036 INFO L226 Difference]: Without dead ends: 2114 [2024-11-13 14:17:29,037 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4939 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=978, Invalid=23828, Unknown=0, NotChecked=0, Total=24806 [2024-11-13 14:17:29,037 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 223 mSDsluCounter, 4677 mSDsCounter, 0 mSdLazyCounter, 11534 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 4754 SdHoareTripleChecker+Invalid, 11585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 11534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2024-11-13 14:17:29,037 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 4754 Invalid, 11585 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [51 Valid, 11534 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2024-11-13 14:17:29,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2024-11-13 14:17:29,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 1271. [2024-11-13 14:17:29,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1271 states, 1269 states have (on average 1.1339637509850276) internal successors, (1439), 1270 states have internal predecessors, (1439), 0 states have call successors, (0), 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 14:17:29,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1439 transitions. [2024-11-13 14:17:29,052 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1439 transitions. Word has length 104 [2024-11-13 14:17:29,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:17:29,053 INFO L471 AbstractCegarLoop]: Abstraction has 1271 states and 1439 transitions. [2024-11-13 14:17:29,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.4186046511627906) internal successors, (208), 86 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 14:17:29,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1439 transitions. [2024-11-13 14:17:29,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-11-13 14:17:29,054 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:17:29,054 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 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 14:17:29,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-11-13 14:17:29,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-11-13 14:17:29,255 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:17:29,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:17:29,255 INFO L85 PathProgramCache]: Analyzing trace with hash 786073937, now seen corresponding path program 4 times [2024-11-13 14:17:29,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:17:29,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127417731] [2024-11-13 14:17:29,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:17:29,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:17:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:17:29,804 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 15 proven. 100 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2024-11-13 14:17:29,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:17:29,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127417731] [2024-11-13 14:17:29,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127417731] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:17:29,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819746973] [2024-11-13 14:17:29,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:17:29,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:17:29,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:17:29,806 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:17:29,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-11-13 14:17:30,250 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:17:30,250 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:17:30,254 INFO L255 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-11-13 14:17:30,256 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:17:31,268 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 57 proven. 98 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-13 14:17:31,268 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:17:32,224 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 14:17:32,456 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 57 proven. 98 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-13 14:17:32,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819746973] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:17:32,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:17:32,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 43 [2024-11-13 14:17:32,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484149742] [2024-11-13 14:17:32,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:17:32,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-13 14:17:32,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:17:32,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-13 14:17:32,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1675, Unknown=0, NotChecked=0, Total=1806 [2024-11-13 14:17:32,457 INFO L87 Difference]: Start difference. First operand 1271 states and 1439 transitions. Second operand has 43 states, 43 states have (on average 5.186046511627907) internal successors, (223), 43 states have internal predecessors, (223), 0 states have call successors, (0), 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 14:17:36,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:17:36,635 INFO L93 Difference]: Finished difference Result 1750 states and 1999 transitions. [2024-11-13 14:17:36,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-13 14:17:36,635 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 5.186046511627907) internal successors, (223), 43 states have internal predecessors, (223), 0 states have call successors, (0), 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 105 [2024-11-13 14:17:36,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:17:36,638 INFO L225 Difference]: With dead ends: 1750 [2024-11-13 14:17:36,638 INFO L226 Difference]: Without dead ends: 1365 [2024-11-13 14:17:36,639 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 176 SyntacticMatches, 7 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1317 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=603, Invalid=6707, Unknown=0, NotChecked=0, Total=7310 [2024-11-13 14:17:36,639 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 623 mSDsluCounter, 1659 mSDsCounter, 0 mSdLazyCounter, 2752 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 1730 SdHoareTripleChecker+Invalid, 2753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:17:36,639 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 1730 Invalid, 2753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2752 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-13 14:17:36,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2024-11-13 14:17:36,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1302. [2024-11-13 14:17:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1300 states have (on average 1.1307692307692307) internal successors, (1470), 1301 states have internal predecessors, (1470), 0 states have call successors, (0), 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 14:17:36,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 1470 transitions. [2024-11-13 14:17:36,657 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 1470 transitions. Word has length 105 [2024-11-13 14:17:36,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:17:36,657 INFO L471 AbstractCegarLoop]: Abstraction has 1302 states and 1470 transitions. [2024-11-13 14:17:36,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 5.186046511627907) internal successors, (223), 43 states have internal predecessors, (223), 0 states have call successors, (0), 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 14:17:36,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 1470 transitions. [2024-11-13 14:17:36,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-13 14:17:36,659 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:17:36,660 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:17:36,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-11-13 14:17:36,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:17:36,861 INFO L396 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:17:36,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:17:36,862 INFO L85 PathProgramCache]: Analyzing trace with hash 803626363, now seen corresponding path program 21 times [2024-11-13 14:17:36,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:17:36,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588431631] [2024-11-13 14:17:36,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:17:36,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:17:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:17:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 17 proven. 749 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:17:39,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:17:39,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588431631] [2024-11-13 14:17:39,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588431631] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:17:39,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042753323] [2024-11-13 14:17:39,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:17:39,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:17:39,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:17:39,729 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:17:39,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024c6c05-d6c4-45a2-a300-5ab81aa54459/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-11-13 14:17:40,781 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2024-11-13 14:17:40,782 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:17:40,789 INFO L255 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 141 conjuncts are in the unsatisfiable core [2024-11-13 14:17:40,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:17:40,803 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 14:17:41,994 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 14:17:50,711 INFO L349 Elim1Store]: treesize reduction 28, result has 68.5 percent of original size [2024-11-13 14:17:50,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 8 case distinctions, treesize of input 88 treesize of output 95 [2024-11-13 14:17:50,719 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-11-13 14:17:50,767 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-13 14:17:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 390 proven. 299 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-13 14:17:51,267 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:19:21,188 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 121 treesize of output 105 [2024-11-13 14:19:21,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 153 [2024-11-13 14:19:21,232 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-11-13 14:19:24,809 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 126 proven. 563 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-13 14:19:24,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042753323] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:19:24,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:19:24,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 131 [2024-11-13 14:19:24,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492737140] [2024-11-13 14:19:24,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:19:24,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2024-11-13 14:19:24,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:19:24,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2024-11-13 14:19:24,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1375, Invalid=15634, Unknown=21, NotChecked=0, Total=17030 [2024-11-13 14:19:24,813 INFO L87 Difference]: Start difference. First operand 1302 states and 1470 transitions. Second operand has 131 states, 131 states have (on average 2.099236641221374) internal successors, (275), 131 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)