./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrncat-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_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/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_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/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_be3862ad-0cf8-490b-8999-45f82948e91f/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 d8697c629a22dee8b5a51c26261db89d3e1115a5e0c1bc03fd54c09ffc3b9b0d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 14:58:00,350 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 14:58:00,440 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-13 14:58:00,452 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 14:58:00,452 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 14:58:00,485 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 14:58:00,487 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 14:58:00,488 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 14:58:00,488 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 14:58:00,489 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 14:58:00,490 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 14:58:00,490 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 14:58:00,490 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 14:58:00,490 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 14:58:00,491 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 14:58:00,491 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 14:58:00,491 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 14:58:00,492 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 14:58:00,492 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 14:58:00,492 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 14:58:00,492 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 14:58:00,492 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 14:58:00,492 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 14:58:00,492 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 14:58:00,492 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 14:58:00,493 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 14:58:00,493 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 14:58:00,493 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 14:58:00,493 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 14:58:00,493 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 14:58:00,493 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 14:58:00,493 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 14:58:00,493 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 14:58:00,493 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:58:00,494 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 14:58:00,494 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 14:58:00,494 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 14:58:00,494 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 14:58:00,494 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 14:58:00,494 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 14:58:00,494 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 14:58:00,494 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 14:58:00,494 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_be3862ad-0cf8-490b-8999-45f82948e91f/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 -> d8697c629a22dee8b5a51c26261db89d3e1115a5e0c1bc03fd54c09ffc3b9b0d [2024-11-13 14:58:00,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 14:58:00,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 14:58:00,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 14:58:00,833 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 14:58:00,833 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 14:58:00,834 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i Unable to find full path for "g++" [2024-11-13 14:58:02,798 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 14:58:03,114 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 14:58:03,114 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i [2024-11-13 14:58:03,126 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/data/c027f5b16/8fad1b76f6e84cadba8afb9cf8b15b92/FLAG389ba66ac [2024-11-13 14:58:03,140 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/data/c027f5b16/8fad1b76f6e84cadba8afb9cf8b15b92 [2024-11-13 14:58:03,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 14:58:03,144 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 14:58:03,145 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 14:58:03,146 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 14:58:03,150 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 14:58:03,151 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:58:03" (1/1) ... [2024-11-13 14:58:03,152 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ea110a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:58:03, skipping insertion in model container [2024-11-13 14:58:03,152 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:58:03" (1/1) ... [2024-11-13 14:58:03,196 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 14:58:03,556 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 14:58:03,558 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 14:58:03,565 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:58:03,578 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 14:58:03,649 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:58:03,676 INFO L204 MainTranslator]: Completed translation [2024-11-13 14:58:03,677 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:58:03 WrapperNode [2024-11-13 14:58:03,677 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 14:58:03,678 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 14:58:03,678 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 14:58:03,678 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 14:58:03,684 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:58:03" (1/1) ... [2024-11-13 14:58:03,693 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:58:03" (1/1) ... [2024-11-13 14:58:03,713 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108 [2024-11-13 14:58:03,713 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 14:58:03,714 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 14:58:03,714 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 14:58:03,714 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 14:58:03,722 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:58:03" (1/1) ... [2024-11-13 14:58:03,723 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:58:03" (1/1) ... [2024-11-13 14:58:03,725 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:58:03" (1/1) ... [2024-11-13 14:58:03,741 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [6, 3]. 67 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 6 writes are split as follows [4, 2]. [2024-11-13 14:58:03,741 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:58:03" (1/1) ... [2024-11-13 14:58:03,742 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:58:03" (1/1) ... [2024-11-13 14:58:03,755 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:58:03" (1/1) ... [2024-11-13 14:58:03,762 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:58:03" (1/1) ... [2024-11-13 14:58:03,768 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:58:03" (1/1) ... [2024-11-13 14:58:03,772 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:58:03" (1/1) ... [2024-11-13 14:58:03,774 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 14:58:03,778 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 14:58:03,778 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 14:58:03,779 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 14:58:03,779 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:58:03" (1/1) ... [2024-11-13 14:58:03,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:58:03,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:58:03,815 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 14:58:03,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 14:58:03,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 14:58:03,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 14:58:03,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 14:58:03,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 14:58:03,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 14:58:03,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 14:58:03,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 14:58:03,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 14:58:03,956 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 14:58:03,958 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 14:58:04,284 INFO L? ?]: Removed 69 outVars from TransFormulas that were not future-live. [2024-11-13 14:58:04,284 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 14:58:04,299 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 14:58:04,299 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-13 14:58:04,300 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:58:04 BoogieIcfgContainer [2024-11-13 14:58:04,300 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 14:58:04,303 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 14:58:04,303 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 14:58:04,311 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 14:58:04,311 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:58:03" (1/3) ... [2024-11-13 14:58:04,312 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b85725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:58:04, skipping insertion in model container [2024-11-13 14:58:04,312 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:58:03" (2/3) ... [2024-11-13 14:58:04,313 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b85725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:58:04, skipping insertion in model container [2024-11-13 14:58:04,313 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:58:04" (3/3) ... [2024-11-13 14:58:04,314 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrncat-alloca-2.i [2024-11-13 14:58:04,330 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 14:58:04,331 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG cstrncat-alloca-2.i that has 1 procedures, 52 locations, 1 initial locations, 4 loop locations, and 19 error locations. [2024-11-13 14:58:04,368 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 14:58:04,380 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;@3eaa1666, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 14:58:04,380 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-13 14:58:04,384 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 32 states have (on average 2.03125) internal successors, (65), 51 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:04,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-13 14:58:04,390 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:04,390 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:04,391 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:04,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:04,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031112, now seen corresponding path program 1 times [2024-11-13 14:58:04,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:04,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795219515] [2024-11-13 14:58:04,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:04,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:04,580 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 14:58:04,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:04,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795219515] [2024-11-13 14:58:04,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795219515] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:58:04,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:58:04,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 14:58:04,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653084218] [2024-11-13 14:58:04,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:58:04,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:58:04,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:04,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:58:04,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 14:58:04,619 INFO L87 Difference]: Start difference. First operand has 52 states, 32 states have (on average 2.03125) internal successors, (65), 51 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 14:58:04,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:04,700 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2024-11-13 14:58:04,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:58:04,702 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 14:58:04,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:04,709 INFO L225 Difference]: With dead ends: 53 [2024-11-13 14:58:04,710 INFO L226 Difference]: Without dead ends: 50 [2024-11-13 14:58:04,712 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 14:58:04,716 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 3 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:04,716 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 89 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:58:04,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-13 14:58:04,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-13 14:58:04,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:04,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2024-11-13 14:58:04,756 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 7 [2024-11-13 14:58:04,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:04,756 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2024-11-13 14:58:04,757 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 14:58:04,758 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2024-11-13 14:58:04,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-13 14:58:04,758 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:04,759 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:04,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 14:58:04,760 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:04,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:04,760 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2024-11-13 14:58:04,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:04,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541044338] [2024-11-13 14:58:04,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:04,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:04,932 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 14:58:04,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:04,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541044338] [2024-11-13 14:58:04,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541044338] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:58:04,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:58:04,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:58:04,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031290464] [2024-11-13 14:58:04,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:58:04,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:58:04,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:04,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:58:04,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:58:04,938 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:05,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:05,047 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2024-11-13 14:58:05,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:58:05,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-13 14:58:05,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:05,048 INFO L225 Difference]: With dead ends: 53 [2024-11-13 14:58:05,048 INFO L226 Difference]: Without dead ends: 50 [2024-11-13 14:58:05,049 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:58:05,049 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:05,050 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 193 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:58:05,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-13 14:58:05,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-13 14:58:05,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 49 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:05,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2024-11-13 14:58:05,055 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 8 [2024-11-13 14:58:05,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:05,055 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2024-11-13 14:58:05,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:05,055 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2024-11-13 14:58:05,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-13 14:58:05,056 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:05,056 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:05,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 14:58:05,056 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:05,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:05,057 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2024-11-13 14:58:05,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:05,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843726267] [2024-11-13 14:58:05,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:05,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:05,272 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 14:58:05,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:05,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843726267] [2024-11-13 14:58:05,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843726267] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:58:05,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:58:05,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 14:58:05,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940376954] [2024-11-13 14:58:05,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:58:05,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:58:05,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:05,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:58:05,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 14:58:05,273 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:05,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:05,319 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2024-11-13 14:58:05,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:58:05,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-13 14:58:05,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:05,320 INFO L225 Difference]: With dead ends: 48 [2024-11-13 14:58:05,320 INFO L226 Difference]: Without dead ends: 48 [2024-11-13 14:58:05,320 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 14:58:05,321 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 15 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:05,321 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 67 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:58:05,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-13 14:58:05,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-11-13 14:58:05,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:05,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2024-11-13 14:58:05,325 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 8 [2024-11-13 14:58:05,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:05,325 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2024-11-13 14:58:05,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:05,325 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2024-11-13 14:58:05,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-13 14:58:05,325 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:05,325 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:05,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 14:58:05,326 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:05,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:05,326 INFO L85 PathProgramCache]: Analyzing trace with hash 178647218, now seen corresponding path program 1 times [2024-11-13 14:58:05,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:05,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797512622] [2024-11-13 14:58:05,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:05,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:05,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:05,703 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 14:58:05,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:05,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797512622] [2024-11-13 14:58:05,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797512622] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:58:05,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:58:05,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:58:05,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975514914] [2024-11-13 14:58:05,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:58:05,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:58:05,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:05,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:58:05,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:58:05,705 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:05,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:05,918 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2024-11-13 14:58:05,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:58:05,919 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-13 14:58:05,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:05,920 INFO L225 Difference]: With dead ends: 51 [2024-11-13 14:58:05,921 INFO L226 Difference]: Without dead ends: 51 [2024-11-13 14:58:05,922 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-13 14:58:05,923 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 38 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:05,923 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 138 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:58:05,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-13 14:58:05,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2024-11-13 14:58:05,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:05,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2024-11-13 14:58:05,931 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 8 [2024-11-13 14:58:05,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:05,931 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2024-11-13 14:58:05,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:05,931 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2024-11-13 14:58:05,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 14:58:05,932 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:05,932 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:05,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 14:58:05,932 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:05,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:05,937 INFO L85 PathProgramCache]: Analyzing trace with hash -118768549, now seen corresponding path program 1 times [2024-11-13 14:58:05,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:05,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995868111] [2024-11-13 14:58:05,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:05,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:06,003 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 14:58:06,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:06,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995868111] [2024-11-13 14:58:06,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995868111] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:58:06,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:58:06,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 14:58:06,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298810945] [2024-11-13 14:58:06,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:58:06,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:58:06,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:06,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:58:06,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:58:06,006 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:06,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:06,040 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2024-11-13 14:58:06,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:58:06,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-13 14:58:06,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:06,042 INFO L225 Difference]: With dead ends: 65 [2024-11-13 14:58:06,042 INFO L226 Difference]: Without dead ends: 65 [2024-11-13 14:58:06,042 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:58:06,043 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 10 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:06,043 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 140 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:58:06,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-13 14:58:06,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2024-11-13 14:58:06,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 58 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:06,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2024-11-13 14:58:06,048 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 10 [2024-11-13 14:58:06,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:06,049 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2024-11-13 14:58:06,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:06,049 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2024-11-13 14:58:06,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 14:58:06,049 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:06,050 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:06,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-13 14:58:06,050 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:06,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:06,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1656238813, now seen corresponding path program 1 times [2024-11-13 14:58:06,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:06,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773179907] [2024-11-13 14:58:06,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:06,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:06,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:06,124 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 14:58:06,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:06,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773179907] [2024-11-13 14:58:06,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773179907] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:58:06,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:58:06,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:58:06,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195198542] [2024-11-13 14:58:06,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:58:06,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:58:06,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:06,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:58:06,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:58:06,126 INFO L87 Difference]: Start difference. First operand 59 states and 71 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 14:58:06,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:06,214 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2024-11-13 14:58:06,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:58:06,215 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 14:58:06,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:06,215 INFO L225 Difference]: With dead ends: 69 [2024-11-13 14:58:06,215 INFO L226 Difference]: Without dead ends: 69 [2024-11-13 14:58:06,216 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:58:06,219 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 20 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:06,219 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 132 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:58:06,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-13 14:58:06,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2024-11-13 14:58:06,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 58 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:06,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2024-11-13 14:58:06,230 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 10 [2024-11-13 14:58:06,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:06,230 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2024-11-13 14:58:06,231 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 14:58:06,231 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2024-11-13 14:58:06,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-13 14:58:06,232 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:06,232 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:06,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 14:58:06,233 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:06,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:06,234 INFO L85 PathProgramCache]: Analyzing trace with hash 614768728, now seen corresponding path program 1 times [2024-11-13 14:58:06,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:06,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622459530] [2024-11-13 14:58:06,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:06,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:06,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:06,739 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 14:58:06,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:06,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622459530] [2024-11-13 14:58:06,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622459530] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:58:06,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245092222] [2024-11-13 14:58:06,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:06,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:06,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:58:06,743 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:58:06,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 14:58:06,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:06,826 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-13 14:58:06,830 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:58:06,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:58:06,957 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 14:58:06,971 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 14:58:07,253 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 14:58:07,254 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:58:07,548 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:58:07,648 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 14:58:07,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245092222] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:58:07,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:58:07,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-13 14:58:07,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675796925] [2024-11-13 14:58:07,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:58:07,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-13 14:58:07,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:07,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-13 14:58:07,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2024-11-13 14:58:07,651 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:07,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:07,928 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2024-11-13 14:58:07,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 14:58:07,929 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-13 14:58:07,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:07,932 INFO L225 Difference]: With dead ends: 62 [2024-11-13 14:58:07,932 INFO L226 Difference]: Without dead ends: 62 [2024-11-13 14:58:07,933 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2024-11-13 14:58:07,933 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 37 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:07,933 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 325 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 14:58:07,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-13 14:58:07,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2024-11-13 14:58:07,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 54 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:07,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2024-11-13 14:58:07,942 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 11 [2024-11-13 14:58:07,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:07,942 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2024-11-13 14:58:07,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:07,942 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2024-11-13 14:58:07,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-13 14:58:07,943 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:07,943 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:07,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 14:58:08,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-13 14:58:08,149 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:08,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:08,150 INFO L85 PathProgramCache]: Analyzing trace with hash 613140601, now seen corresponding path program 1 times [2024-11-13 14:58:08,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:08,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565245245] [2024-11-13 14:58:08,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:08,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:08,423 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 14:58:08,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:08,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565245245] [2024-11-13 14:58:08,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565245245] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:58:08,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:58:08,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:58:08,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423861260] [2024-11-13 14:58:08,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:58:08,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:58:08,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:08,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:58:08,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:58:08,425 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:08,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:08,631 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2024-11-13 14:58:08,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:58:08,632 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-13 14:58:08,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:08,633 INFO L225 Difference]: With dead ends: 85 [2024-11-13 14:58:08,633 INFO L226 Difference]: Without dead ends: 85 [2024-11-13 14:58:08,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-13 14:58:08,634 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 50 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:08,634 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 109 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:58:08,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-13 14:58:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 63. [2024-11-13 14:58:08,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 62 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:08,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2024-11-13 14:58:08,638 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 11 [2024-11-13 14:58:08,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:08,638 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2024-11-13 14:58:08,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:08,639 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2024-11-13 14:58:08,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-13 14:58:08,639 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:08,639 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:08,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-13 14:58:08,639 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:08,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:08,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1906819333, now seen corresponding path program 1 times [2024-11-13 14:58:08,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:08,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092668406] [2024-11-13 14:58:08,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:08,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:08,833 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 14:58:08,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:08,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092668406] [2024-11-13 14:58:08,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092668406] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:58:08,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:58:08,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:58:08,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994617371] [2024-11-13 14:58:08,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:58:08,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:58:08,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:08,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:58:08,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:58:08,834 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:08,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:08,923 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2024-11-13 14:58:08,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:58:08,923 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-13 14:58:08,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:08,924 INFO L225 Difference]: With dead ends: 62 [2024-11-13 14:58:08,924 INFO L226 Difference]: Without dead ends: 62 [2024-11-13 14:58:08,925 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:58:08,925 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 35 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:08,925 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 129 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:58:08,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-13 14:58:08,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2024-11-13 14:58:08,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.641025641025641) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:08,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2024-11-13 14:58:08,935 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 11 [2024-11-13 14:58:08,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:08,935 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2024-11-13 14:58:08,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:08,936 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2024-11-13 14:58:08,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-13 14:58:08,936 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:08,936 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:08,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-13 14:58:08,936 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:08,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:08,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1827489447, now seen corresponding path program 1 times [2024-11-13 14:58:08,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:08,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505604360] [2024-11-13 14:58:08,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:08,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:08,988 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 14:58:08,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:08,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505604360] [2024-11-13 14:58:08,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505604360] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:58:08,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:58:08,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 14:58:08,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340843646] [2024-11-13 14:58:08,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:58:08,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:58:08,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:08,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:58:08,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 14:58:08,990 INFO L87 Difference]: Start difference. First operand 54 states and 64 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 14:58:09,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:09,034 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2024-11-13 14:58:09,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:58:09,035 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 14:58:09,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:09,035 INFO L225 Difference]: With dead ends: 52 [2024-11-13 14:58:09,035 INFO L226 Difference]: Without dead ends: 52 [2024-11-13 14:58:09,036 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 14:58:09,036 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 7 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:09,036 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 65 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:58:09,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-13 14:58:09,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-13 14:58:09,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:09,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2024-11-13 14:58:09,042 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 12 [2024-11-13 14:58:09,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:09,043 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2024-11-13 14:58:09,043 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 14:58:09,043 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2024-11-13 14:58:09,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-13 14:58:09,045 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:09,045 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:09,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-13 14:58:09,046 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:09,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:09,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1827489448, now seen corresponding path program 1 times [2024-11-13 14:58:09,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:09,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736559343] [2024-11-13 14:58:09,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:09,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:09,171 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 14:58:09,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:09,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736559343] [2024-11-13 14:58:09,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736559343] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:58:09,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:58:09,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 14:58:09,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785121693] [2024-11-13 14:58:09,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:58:09,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:58:09,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:09,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:58:09,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:58:09,173 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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 14:58:09,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:09,222 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2024-11-13 14:58:09,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:58:09,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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 14:58:09,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:09,223 INFO L225 Difference]: With dead ends: 57 [2024-11-13 14:58:09,223 INFO L226 Difference]: Without dead ends: 57 [2024-11-13 14:58:09,224 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:58:09,224 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 4 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 117 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 14:58:09,224 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 117 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:58:09,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-13 14:58:09,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-11-13 14:58:09,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:09,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2024-11-13 14:58:09,227 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 12 [2024-11-13 14:58:09,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:09,228 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2024-11-13 14:58:09,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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 14:58:09,228 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2024-11-13 14:58:09,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-13 14:58:09,228 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:09,229 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:09,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-13 14:58:09,229 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:09,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:09,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1787419478, now seen corresponding path program 1 times [2024-11-13 14:58:09,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:09,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227557980] [2024-11-13 14:58:09,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:09,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:09,362 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 14:58:09,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:09,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227557980] [2024-11-13 14:58:09,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227557980] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:58:09,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:58:09,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 14:58:09,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135195117] [2024-11-13 14:58:09,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:58:09,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:58:09,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:09,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:58:09,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:58:09,364 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:09,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:09,393 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2024-11-13 14:58:09,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:58:09,394 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-13 14:58:09,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:09,395 INFO L225 Difference]: With dead ends: 56 [2024-11-13 14:58:09,395 INFO L226 Difference]: Without dead ends: 56 [2024-11-13 14:58:09,395 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:58:09,395 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 14 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:09,396 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 103 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:58:09,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-13 14:58:09,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2024-11-13 14:58:09,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.564102564102564) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:09,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2024-11-13 14:58:09,402 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 12 [2024-11-13 14:58:09,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:09,403 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2024-11-13 14:58:09,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:09,403 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2024-11-13 14:58:09,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-13 14:58:09,404 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:09,404 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:09,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-13 14:58:09,404 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:09,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:09,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1989147840, now seen corresponding path program 1 times [2024-11-13 14:58:09,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:09,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109380107] [2024-11-13 14:58:09,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:09,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:09,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:09,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:09,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109380107] [2024-11-13 14:58:09,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109380107] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:58:09,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609324061] [2024-11-13 14:58:09,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:09,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:09,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:58:09,676 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:58:09,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 14:58:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:09,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 14:58:09,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:58:09,793 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 14:58:09,932 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 14:58:09,932 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:58:09,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609324061] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:58:09,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:58:09,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2024-11-13 14:58:09,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096102845] [2024-11-13 14:58:09,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:58:09,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:58:09,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:09,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:58:09,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-13 14:58:09,934 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:10,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:10,033 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2024-11-13 14:58:10,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:58:10,033 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-13 14:58:10,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:10,034 INFO L225 Difference]: With dead ends: 50 [2024-11-13 14:58:10,034 INFO L226 Difference]: Without dead ends: 50 [2024-11-13 14:58:10,034 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-11-13 14:58:10,035 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:10,035 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 141 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:58:10,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-13 14:58:10,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-13 14:58:10,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.5384615384615385) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:10,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2024-11-13 14:58:10,041 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 13 [2024-11-13 14:58:10,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:10,042 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2024-11-13 14:58:10,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:10,042 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2024-11-13 14:58:10,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-13 14:58:10,042 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:10,042 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:10,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 14:58:10,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:10,243 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:10,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:10,243 INFO L85 PathProgramCache]: Analyzing trace with hash -424264405, now seen corresponding path program 1 times [2024-11-13 14:58:10,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:10,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648594865] [2024-11-13 14:58:10,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:10,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:10,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:10,312 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 14:58:10,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:10,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648594865] [2024-11-13 14:58:10,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648594865] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:58:10,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:58:10,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 14:58:10,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585153282] [2024-11-13 14:58:10,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:58:10,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:58:10,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:10,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:58:10,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:58:10,317 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:10,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:10,371 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2024-11-13 14:58:10,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:58:10,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-13 14:58:10,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:10,376 INFO L225 Difference]: With dead ends: 48 [2024-11-13 14:58:10,376 INFO L226 Difference]: Without dead ends: 48 [2024-11-13 14:58:10,376 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 14:58:10,377 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:10,377 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 56 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:58:10,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-13 14:58:10,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2024-11-13 14:58:10,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.435897435897436) internal successors, (56), 45 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:10,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2024-11-13 14:58:10,383 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 14 [2024-11-13 14:58:10,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:10,383 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2024-11-13 14:58:10,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:10,384 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2024-11-13 14:58:10,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-13 14:58:10,384 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:10,384 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:10,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-13 14:58:10,384 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:10,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:10,385 INFO L85 PathProgramCache]: Analyzing trace with hash -424264404, now seen corresponding path program 1 times [2024-11-13 14:58:10,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:10,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445030756] [2024-11-13 14:58:10,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:10,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:10,555 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 14:58:10,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:10,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445030756] [2024-11-13 14:58:10,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445030756] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:58:10,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:58:10,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:58:10,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439866727] [2024-11-13 14:58:10,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:58:10,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:58:10,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:10,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:58:10,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:58:10,557 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:10,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:10,702 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2024-11-13 14:58:10,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 14:58:10,702 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-13 14:58:10,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:10,703 INFO L225 Difference]: With dead ends: 68 [2024-11-13 14:58:10,703 INFO L226 Difference]: Without dead ends: 68 [2024-11-13 14:58:10,703 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-13 14:58:10,704 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 43 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:10,706 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 110 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:58:10,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-13 14:58:10,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2024-11-13 14:58:10,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.46) internal successors, (73), 56 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 14:58:10,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2024-11-13 14:58:10,713 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 14 [2024-11-13 14:58:10,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:10,713 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2024-11-13 14:58:10,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:10,713 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2024-11-13 14:58:10,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-13 14:58:10,714 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:10,714 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:10,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-13 14:58:10,714 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:10,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:10,714 INFO L85 PathProgramCache]: Analyzing trace with hash 303801349, now seen corresponding path program 1 times [2024-11-13 14:58:10,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:10,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496383529] [2024-11-13 14:58:10,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:10,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:11,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:11,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496383529] [2024-11-13 14:58:11,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496383529] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:58:11,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012792174] [2024-11-13 14:58:11,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:11,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:11,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:58:11,188 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:58:11,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 14:58:11,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:11,293 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-13 14:58:11,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:58:11,380 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 14:58:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:11,449 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:58:11,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012792174] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:58:11,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:58:11,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 14 [2024-11-13 14:58:11,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614752564] [2024-11-13 14:58:11,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:58:11,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 14:58:11,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:11,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 14:58:11,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2024-11-13 14:58:11,451 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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 14:58:11,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:11,637 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2024-11-13 14:58:11,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 14:58:11,638 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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 14:58:11,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:11,638 INFO L225 Difference]: With dead ends: 82 [2024-11-13 14:58:11,638 INFO L226 Difference]: Without dead ends: 82 [2024-11-13 14:58:11,639 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2024-11-13 14:58:11,639 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 36 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:11,639 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 177 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:58:11,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-13 14:58:11,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 66. [2024-11-13 14:58:11,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 59 states have (on average 1.4067796610169492) internal successors, (83), 65 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:11,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2024-11-13 14:58:11,644 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 16 [2024-11-13 14:58:11,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:11,645 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2024-11-13 14:58:11,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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 14:58:11,646 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2024-11-13 14:58:11,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-13 14:58:11,647 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:11,647 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:11,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 14:58:11,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-13 14:58:11,847 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:11,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:11,848 INFO L85 PathProgramCache]: Analyzing trace with hash -104726060, now seen corresponding path program 1 times [2024-11-13 14:58:11,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:11,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692367139] [2024-11-13 14:58:11,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:11,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:11,931 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 14:58:11,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:11,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692367139] [2024-11-13 14:58:11,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692367139] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:58:11,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:58:11,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 14:58:11,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672202429] [2024-11-13 14:58:11,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:58:11,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:58:11,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:11,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:58:11,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:58:11,935 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:11,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:11,998 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2024-11-13 14:58:11,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:58:11,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-13 14:58:11,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:11,999 INFO L225 Difference]: With dead ends: 65 [2024-11-13 14:58:11,999 INFO L226 Difference]: Without dead ends: 65 [2024-11-13 14:58:11,999 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 14:58:12,000 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 28 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:12,001 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 88 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:58:12,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-13 14:58:12,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-11-13 14:58:12,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 64 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 14:58:12,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2024-11-13 14:58:12,005 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 18 [2024-11-13 14:58:12,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:12,005 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2024-11-13 14:58:12,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:12,005 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2024-11-13 14:58:12,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-13 14:58:12,007 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:12,007 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:12,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-13 14:58:12,007 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:12,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:12,008 INFO L85 PathProgramCache]: Analyzing trace with hash -104726059, now seen corresponding path program 1 times [2024-11-13 14:58:12,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:12,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984897828] [2024-11-13 14:58:12,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:12,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:12,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:12,242 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 14:58:12,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:12,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984897828] [2024-11-13 14:58:12,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984897828] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:58:12,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:58:12,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 14:58:12,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395054955] [2024-11-13 14:58:12,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:58:12,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 14:58:12,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:12,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 14:58:12,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:58:12,244 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:12,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:12,355 INFO L93 Difference]: Finished difference Result 85 states and 106 transitions. [2024-11-13 14:58:12,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 14:58:12,356 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-13 14:58:12,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:12,357 INFO L225 Difference]: With dead ends: 85 [2024-11-13 14:58:12,357 INFO L226 Difference]: Without dead ends: 85 [2024-11-13 14:58:12,357 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-13 14:58:12,357 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 30 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:12,358 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 119 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:58:12,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-13 14:58:12,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 70. [2024-11-13 14:58:12,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 64 states have (on average 1.375) internal successors, (88), 69 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:12,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2024-11-13 14:58:12,360 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 18 [2024-11-13 14:58:12,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:12,360 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2024-11-13 14:58:12,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:12,360 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2024-11-13 14:58:12,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-13 14:58:12,361 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:12,361 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 14:58:12,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-13 14:58:12,361 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:12,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:12,362 INFO L85 PathProgramCache]: Analyzing trace with hash 979062187, now seen corresponding path program 1 times [2024-11-13 14:58:12,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:12,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493224907] [2024-11-13 14:58:12,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:12,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:12,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:12,571 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 14:58:12,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:12,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493224907] [2024-11-13 14:58:12,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493224907] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:58:12,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725507625] [2024-11-13 14:58:12,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:12,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:12,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:58:12,573 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:58:12,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 14:58:12,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:12,668 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-13 14:58:12,670 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:58:12,810 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 14:58:12,810 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:58:12,907 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 23 treesize of output 19 [2024-11-13 14:58:12,998 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 14:58:12,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725507625] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:58:12,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:58:12,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2024-11-13 14:58:12,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251283910] [2024-11-13 14:58:12,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:58:12,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 14:58:13,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:13,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 14:58:13,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-11-13 14:58:13,003 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 17 states, 16 states have (on average 2.875) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:13,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:13,315 INFO L93 Difference]: Finished difference Result 112 states and 143 transitions. [2024-11-13 14:58:13,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 14:58:13,316 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 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 14:58:13,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:13,317 INFO L225 Difference]: With dead ends: 112 [2024-11-13 14:58:13,317 INFO L226 Difference]: Without dead ends: 112 [2024-11-13 14:58:13,317 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-11-13 14:58:13,318 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 47 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:13,318 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 443 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 14:58:13,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-13 14:58:13,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 77. [2024-11-13 14:58:13,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.375) internal successors, (99), 76 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 14:58:13,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 99 transitions. [2024-11-13 14:58:13,323 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 99 transitions. Word has length 19 [2024-11-13 14:58:13,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:13,323 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 99 transitions. [2024-11-13 14:58:13,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:13,323 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 99 transitions. [2024-11-13 14:58:13,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-13 14:58:13,324 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:13,324 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:13,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 14:58:13,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:13,524 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:13,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:13,525 INFO L85 PathProgramCache]: Analyzing trace with hash 280924356, now seen corresponding path program 2 times [2024-11-13 14:58:13,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:13,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291653403] [2024-11-13 14:58:13,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:13,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:13,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:14,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:14,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:14,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291653403] [2024-11-13 14:58:14,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291653403] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:58:14,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666823017] [2024-11-13 14:58:14,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:58:14,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:14,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:58:14,013 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:58:14,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 14:58:14,104 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:58:14,104 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:58:14,106 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-13 14:58:14,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:58:14,206 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 14:58:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:14,307 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:58:14,328 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 18 treesize of output 16 [2024-11-13 14:58:14,332 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 14:58:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:14,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666823017] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:58:14,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:58:14,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 20 [2024-11-13 14:58:14,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711427305] [2024-11-13 14:58:14,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:58:14,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-13 14:58:14,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:14,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-13 14:58:14,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2024-11-13 14:58:14,423 INFO L87 Difference]: Start difference. First operand 77 states and 99 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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 14:58:15,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:15,412 INFO L93 Difference]: Finished difference Result 260 states and 333 transitions. [2024-11-13 14:58:15,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-13 14:58:15,412 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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 21 [2024-11-13 14:58:15,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:15,413 INFO L225 Difference]: With dead ends: 260 [2024-11-13 14:58:15,415 INFO L226 Difference]: Without dead ends: 260 [2024-11-13 14:58:15,416 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2024-11-13 14:58:15,416 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 168 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:15,416 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 967 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 14:58:15,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-11-13 14:58:15,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 147. [2024-11-13 14:58:15,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.323943661971831) internal successors, (188), 146 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 14:58:15,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 188 transitions. [2024-11-13 14:58:15,428 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 188 transitions. Word has length 21 [2024-11-13 14:58:15,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:15,428 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 188 transitions. [2024-11-13 14:58:15,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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 14:58:15,428 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 188 transitions. [2024-11-13 14:58:15,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-13 14:58:15,429 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:15,429 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:15,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 14:58:15,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:15,630 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:15,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:15,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1925046016, now seen corresponding path program 1 times [2024-11-13 14:58:15,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:15,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845005894] [2024-11-13 14:58:15,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:15,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:15,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:15,661 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 14:58:15,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:15,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845005894] [2024-11-13 14:58:15,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845005894] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:58:15,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:58:15,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 14:58:15,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80269082] [2024-11-13 14:58:15,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:58:15,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:58:15,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:15,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:58:15,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 14:58:15,663 INFO L87 Difference]: Start difference. First operand 147 states and 188 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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 14:58:15,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:15,674 INFO L93 Difference]: Finished difference Result 145 states and 180 transitions. [2024-11-13 14:58:15,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:58:15,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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 14:58:15,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:15,675 INFO L225 Difference]: With dead ends: 145 [2024-11-13 14:58:15,675 INFO L226 Difference]: Without dead ends: 145 [2024-11-13 14:58:15,675 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 14:58:15,676 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:15,676 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:58:15,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-11-13 14:58:15,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 141. [2024-11-13 14:58:15,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.2941176470588236) internal successors, (176), 140 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:15,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 176 transitions. [2024-11-13 14:58:15,680 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 176 transitions. Word has length 22 [2024-11-13 14:58:15,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:15,681 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 176 transitions. [2024-11-13 14:58:15,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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 14:58:15,681 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 176 transitions. [2024-11-13 14:58:15,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-13 14:58:15,681 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:15,681 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] [2024-11-13 14:58:15,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-13 14:58:15,682 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:15,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:15,682 INFO L85 PathProgramCache]: Analyzing trace with hash -489162763, now seen corresponding path program 1 times [2024-11-13 14:58:15,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:15,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688344728] [2024-11-13 14:58:15,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:15,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:15,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:15,763 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 14:58:15,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:15,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688344728] [2024-11-13 14:58:15,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688344728] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:58:15,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:58:15,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:58:15,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879707607] [2024-11-13 14:58:15,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:58:15,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:58:15,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:15,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:58:15,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:58:15,765 INFO L87 Difference]: Start difference. First operand 141 states and 176 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:15,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:15,802 INFO L93 Difference]: Finished difference Result 152 states and 187 transitions. [2024-11-13 14:58:15,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:58:15,802 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-13 14:58:15,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:15,803 INFO L225 Difference]: With dead ends: 152 [2024-11-13 14:58:15,803 INFO L226 Difference]: Without dead ends: 152 [2024-11-13 14:58:15,803 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 14:58:15,807 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 19 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:15,808 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 120 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:58:15,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-13 14:58:15,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 141. [2024-11-13 14:58:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.2720588235294117) internal successors, (173), 140 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 14:58:15,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 173 transitions. [2024-11-13 14:58:15,815 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 173 transitions. Word has length 23 [2024-11-13 14:58:15,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:15,815 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 173 transitions. [2024-11-13 14:58:15,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:15,816 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 173 transitions. [2024-11-13 14:58:15,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-13 14:58:15,816 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:15,817 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:15,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-13 14:58:15,817 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:15,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:15,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1000023143, now seen corresponding path program 1 times [2024-11-13 14:58:15,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:15,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635435856] [2024-11-13 14:58:15,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:15,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:15,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:15,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:15,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:15,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635435856] [2024-11-13 14:58:15,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635435856] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:58:15,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831401190] [2024-11-13 14:58:15,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:15,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:15,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:58:15,921 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:58:15,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 14:58:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:16,015 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 14:58:16,017 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:58:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:16,048 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:58:16,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:16,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831401190] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:58:16,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:58:16,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2024-11-13 14:58:16,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301860764] [2024-11-13 14:58:16,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:58:16,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:58:16,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:16,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:58:16,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:58:16,083 INFO L87 Difference]: Start difference. First operand 141 states and 173 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 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 14:58:16,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:16,142 INFO L93 Difference]: Finished difference Result 184 states and 220 transitions. [2024-11-13 14:58:16,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 14:58:16,142 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 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 14:58:16,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:16,143 INFO L225 Difference]: With dead ends: 184 [2024-11-13 14:58:16,143 INFO L226 Difference]: Without dead ends: 184 [2024-11-13 14:58:16,144 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 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 14:58:16,144 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 24 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:16,145 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 193 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:58:16,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-11-13 14:58:16,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 161. [2024-11-13 14:58:16,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.25) internal successors, (195), 160 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 14:58:16,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 195 transitions. [2024-11-13 14:58:16,150 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 195 transitions. Word has length 24 [2024-11-13 14:58:16,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:16,150 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 195 transitions. [2024-11-13 14:58:16,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 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 14:58:16,150 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 195 transitions. [2024-11-13 14:58:16,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-13 14:58:16,151 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:16,151 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:16,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-13 14:58:16,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-13 14:58:16,352 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:16,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:16,352 INFO L85 PathProgramCache]: Analyzing trace with hash -2056737892, now seen corresponding path program 1 times [2024-11-13 14:58:16,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:16,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321140362] [2024-11-13 14:58:16,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:16,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:16,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:16,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321140362] [2024-11-13 14:58:16,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321140362] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:58:16,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604999651] [2024-11-13 14:58:16,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:16,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:16,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:58:16,609 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:58:16,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 14:58:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:16,713 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-13 14:58:16,715 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:58:16,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:16,848 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:58:17,010 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 7 treesize of output 5 [2024-11-13 14:58:17,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:17,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604999651] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:58:17,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:58:17,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2024-11-13 14:58:17,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569618330] [2024-11-13 14:58:17,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:58:17,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-13 14:58:17,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:17,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-13 14:58:17,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-11-13 14:58:17,068 INFO L87 Difference]: Start difference. First operand 161 states and 195 transitions. Second operand has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:17,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:17,530 INFO L93 Difference]: Finished difference Result 237 states and 285 transitions. [2024-11-13 14:58:17,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 14:58:17,530 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 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 14:58:17,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:17,531 INFO L225 Difference]: With dead ends: 237 [2024-11-13 14:58:17,531 INFO L226 Difference]: Without dead ends: 237 [2024-11-13 14:58:17,532 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2024-11-13 14:58:17,533 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 67 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:17,533 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 662 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 14:58:17,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-11-13 14:58:17,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 172. [2024-11-13 14:58:17,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.2574850299401197) internal successors, (210), 171 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:17,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 210 transitions. [2024-11-13 14:58:17,542 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 210 transitions. Word has length 24 [2024-11-13 14:58:17,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:17,542 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 210 transitions. [2024-11-13 14:58:17,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:17,543 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 210 transitions. [2024-11-13 14:58:17,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-13 14:58:17,543 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:17,543 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:17,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 14:58:17,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-13 14:58:17,744 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:17,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:17,744 INFO L85 PathProgramCache]: Analyzing trace with hash 182374693, now seen corresponding path program 1 times [2024-11-13 14:58:17,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:17,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65571656] [2024-11-13 14:58:17,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:17,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:17,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:17,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:17,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:17,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65571656] [2024-11-13 14:58:17,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65571656] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:58:17,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:58:17,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-13 14:58:17,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207794708] [2024-11-13 14:58:17,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:58:17,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 14:58:17,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:17,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 14:58:17,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-13 14:58:17,970 INFO L87 Difference]: Start difference. First operand 172 states and 210 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 14:58:18,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:18,041 INFO L93 Difference]: Finished difference Result 255 states and 302 transitions. [2024-11-13 14:58:18,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 14:58:18,042 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 14:58:18,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:18,044 INFO L225 Difference]: With dead ends: 255 [2024-11-13 14:58:18,044 INFO L226 Difference]: Without dead ends: 255 [2024-11-13 14:58:18,044 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-13 14:58:18,044 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 9 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:18,045 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 222 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:58:18,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2024-11-13 14:58:18,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 190. [2024-11-13 14:58:18,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.2432432432432432) internal successors, (230), 189 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:18,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 230 transitions. [2024-11-13 14:58:18,055 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 230 transitions. Word has length 24 [2024-11-13 14:58:18,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:18,055 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 230 transitions. [2024-11-13 14:58:18,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 14:58:18,056 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 230 transitions. [2024-11-13 14:58:18,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-13 14:58:18,056 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:18,056 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:18,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-13 14:58:18,056 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:18,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:18,057 INFO L85 PathProgramCache]: Analyzing trace with hash 605076519, now seen corresponding path program 1 times [2024-11-13 14:58:18,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:18,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627235353] [2024-11-13 14:58:18,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:18,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:18,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:18,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627235353] [2024-11-13 14:58:18,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627235353] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:58:18,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:58:18,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-13 14:58:18,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430366373] [2024-11-13 14:58:18,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:58:18,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 14:58:18,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:18,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 14:58:18,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-13 14:58:18,328 INFO L87 Difference]: Start difference. First operand 190 states and 230 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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 14:58:18,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:18,445 INFO L93 Difference]: Finished difference Result 212 states and 252 transitions. [2024-11-13 14:58:18,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 14:58:18,446 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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 14:58:18,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:18,447 INFO L225 Difference]: With dead ends: 212 [2024-11-13 14:58:18,447 INFO L226 Difference]: Without dead ends: 212 [2024-11-13 14:58:18,447 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-13 14:58:18,448 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:18,449 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 225 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:58:18,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2024-11-13 14:58:18,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 176. [2024-11-13 14:58:18,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.263157894736842) internal successors, (216), 175 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:18,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 216 transitions. [2024-11-13 14:58:18,463 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 216 transitions. Word has length 24 [2024-11-13 14:58:18,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:18,463 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 216 transitions. [2024-11-13 14:58:18,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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 14:58:18,463 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 216 transitions. [2024-11-13 14:58:18,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-13 14:58:18,464 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:18,464 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:18,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-13 14:58:18,464 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:18,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:18,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1059012297, now seen corresponding path program 3 times [2024-11-13 14:58:18,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:18,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507506626] [2024-11-13 14:58:18,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:18,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:19,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:19,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507506626] [2024-11-13 14:58:19,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507506626] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:58:19,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616351919] [2024-11-13 14:58:19,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:58:19,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:19,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:58:19,012 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:58:19,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 14:58:19,128 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-13 14:58:19,128 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:58:19,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-13 14:58:19,133 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:58:19,210 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 17 treesize of output 13 [2024-11-13 14:58:19,579 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:58:19,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2024-11-13 14:58:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:19,708 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:58:20,181 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 14 [2024-11-13 14:58:20,187 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 17 treesize of output 13 [2024-11-13 14:58:20,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2024-11-13 14:58:20,267 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:20,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616351919] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:58:20,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:58:20,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2024-11-13 14:58:20,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558181993] [2024-11-13 14:58:20,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:58:20,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-13 14:58:20,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:20,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-13 14:58:20,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2024-11-13 14:58:20,268 INFO L87 Difference]: Start difference. First operand 176 states and 216 transitions. Second operand has 26 states, 25 states have (on average 2.32) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:29,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:29,930 INFO L93 Difference]: Finished difference Result 366 states and 434 transitions. [2024-11-13 14:58:29,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-13 14:58:29,931 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-13 14:58:29,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:29,933 INFO L225 Difference]: With dead ends: 366 [2024-11-13 14:58:29,933 INFO L226 Difference]: Without dead ends: 366 [2024-11-13 14:58:29,934 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=195, Invalid=1210, Unknown=1, NotChecked=0, Total=1406 [2024-11-13 14:58:29,934 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 325 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:29,935 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 874 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-13 14:58:29,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2024-11-13 14:58:29,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 182. [2024-11-13 14:58:29,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.271186440677966) internal successors, (225), 181 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:29,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 225 transitions. [2024-11-13 14:58:29,943 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 225 transitions. Word has length 26 [2024-11-13 14:58:29,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:29,943 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 225 transitions. [2024-11-13 14:58:29,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:29,943 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 225 transitions. [2024-11-13 14:58:29,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-13 14:58:29,944 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:29,944 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:29,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-13 14:58:30,148 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-13 14:58:30,148 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:30,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:30,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1086480128, now seen corresponding path program 1 times [2024-11-13 14:58:30,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:30,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341678068] [2024-11-13 14:58:30,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:30,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:30,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:30,286 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 14:58:30,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:30,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341678068] [2024-11-13 14:58:30,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341678068] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:58:30,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:58:30,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 14:58:30,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790492389] [2024-11-13 14:58:30,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:58:30,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:58:30,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:30,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:58:30,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:58:30,288 INFO L87 Difference]: Start difference. First operand 182 states and 225 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:30,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:30,321 INFO L93 Difference]: Finished difference Result 181 states and 224 transitions. [2024-11-13 14:58:30,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:58:30,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-13 14:58:30,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:30,323 INFO L225 Difference]: With dead ends: 181 [2024-11-13 14:58:30,323 INFO L226 Difference]: Without dead ends: 133 [2024-11-13 14:58:30,323 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 14:58:30,323 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 17 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:30,323 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 60 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:58:30,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-11-13 14:58:30,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2024-11-13 14:58:30,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 129 states have (on average 1.186046511627907) internal successors, (153), 132 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 14:58:30,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 153 transitions. [2024-11-13 14:58:30,328 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 153 transitions. Word has length 26 [2024-11-13 14:58:30,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:30,328 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 153 transitions. [2024-11-13 14:58:30,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:30,330 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 153 transitions. [2024-11-13 14:58:30,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-13 14:58:30,331 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:30,331 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-13 14:58:30,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-13 14:58:30,332 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:30,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:30,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1830283187, now seen corresponding path program 1 times [2024-11-13 14:58:30,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:30,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808544503] [2024-11-13 14:58:30,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:30,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:58:30,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:30,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808544503] [2024-11-13 14:58:30,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808544503] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:58:30,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:58:30,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-13 14:58:30,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256685668] [2024-11-13 14:58:30,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:58:30,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 14:58:30,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:30,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 14:58:30,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-13 14:58:30,572 INFO L87 Difference]: Start difference. First operand 133 states and 153 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:30,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:30,686 INFO L93 Difference]: Finished difference Result 201 states and 227 transitions. [2024-11-13 14:58:30,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 14:58:30,687 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-13 14:58:30,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:30,688 INFO L225 Difference]: With dead ends: 201 [2024-11-13 14:58:30,688 INFO L226 Difference]: Without dead ends: 169 [2024-11-13 14:58:30,689 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-13 14:58:30,689 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 12 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:30,690 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 200 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:58:30,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-13 14:58:30,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 136. [2024-11-13 14:58:30,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 132 states have (on average 1.196969696969697) internal successors, (158), 135 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:30,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 158 transitions. [2024-11-13 14:58:30,695 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 158 transitions. Word has length 27 [2024-11-13 14:58:30,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:30,695 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 158 transitions. [2024-11-13 14:58:30,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:30,696 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 158 transitions. [2024-11-13 14:58:30,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-13 14:58:30,696 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:30,696 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:30,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-11-13 14:58:30,696 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:30,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:30,697 INFO L85 PathProgramCache]: Analyzing trace with hash 196432208, now seen corresponding path program 4 times [2024-11-13 14:58:30,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:30,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227993746] [2024-11-13 14:58:30,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:30,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:31,088 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:58:31,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:31,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227993746] [2024-11-13 14:58:31,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227993746] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:58:31,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771376067] [2024-11-13 14:58:31,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:58:31,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:31,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:58:31,091 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:58:31,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 14:58:31,212 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:58:31,212 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:58:31,214 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-13 14:58:31,217 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:58:31,352 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 14:58:31,434 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:58:31,435 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:58:31,464 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 18 treesize of output 16 [2024-11-13 14:58:31,467 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 14:58:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:58:31,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771376067] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:58:31,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:58:31,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2024-11-13 14:58:31,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864495811] [2024-11-13 14:58:31,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:58:31,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 14:58:31,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:31,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 14:58:31,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2024-11-13 14:58:31,578 INFO L87 Difference]: Start difference. First operand 136 states and 158 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:32,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:32,023 INFO L93 Difference]: Finished difference Result 217 states and 246 transitions. [2024-11-13 14:58:32,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 14:58:32,024 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-13 14:58:32,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:32,025 INFO L225 Difference]: With dead ends: 217 [2024-11-13 14:58:32,026 INFO L226 Difference]: Without dead ends: 190 [2024-11-13 14:58:32,026 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2024-11-13 14:58:32,027 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 26 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:32,028 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 644 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 14:58:32,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-11-13 14:58:32,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 156. [2024-11-13 14:58:32,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 152 states have (on average 1.1907894736842106) internal successors, (181), 155 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:32,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 181 transitions. [2024-11-13 14:58:32,034 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 181 transitions. Word has length 28 [2024-11-13 14:58:32,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:32,034 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 181 transitions. [2024-11-13 14:58:32,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:32,034 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 181 transitions. [2024-11-13 14:58:32,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-13 14:58:32,036 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:32,036 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-13 14:58:32,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-13 14:58:32,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:32,237 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:32,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:32,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1986643613, now seen corresponding path program 1 times [2024-11-13 14:58:32,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:32,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765059730] [2024-11-13 14:58:32,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:32,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:32,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:58:32,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:32,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765059730] [2024-11-13 14:58:32,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765059730] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:58:32,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902871180] [2024-11-13 14:58:32,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:32,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:32,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:58:32,542 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:58:32,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 14:58:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:32,666 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-13 14:58:32,668 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:58:32,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:58:32,814 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:58:33,023 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 14:58:33,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:58:33,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902871180] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:58:33,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:58:33,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2024-11-13 14:58:33,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059430472] [2024-11-13 14:58:33,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:58:33,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 14:58:33,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:33,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 14:58:33,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2024-11-13 14:58:33,064 INFO L87 Difference]: Start difference. First operand 156 states and 181 transitions. Second operand has 21 states, 20 states have (on average 3.1) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:33,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:33,348 INFO L93 Difference]: Finished difference Result 180 states and 203 transitions. [2024-11-13 14:58:33,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 14:58:33,349 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.1) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-13 14:58:33,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:33,350 INFO L225 Difference]: With dead ends: 180 [2024-11-13 14:58:33,350 INFO L226 Difference]: Without dead ends: 180 [2024-11-13 14:58:33,350 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-11-13 14:58:33,351 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 23 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:33,351 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 252 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 14:58:33,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-11-13 14:58:33,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 168. [2024-11-13 14:58:33,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 164 states have (on average 1.1768292682926829) internal successors, (193), 167 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:33,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 193 transitions. [2024-11-13 14:58:33,356 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 193 transitions. Word has length 30 [2024-11-13 14:58:33,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:33,356 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 193 transitions. [2024-11-13 14:58:33,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.1) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:33,356 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 193 transitions. [2024-11-13 14:58:33,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-13 14:58:33,357 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:33,357 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:33,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-13 14:58:33,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:33,562 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:33,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:33,563 INFO L85 PathProgramCache]: Analyzing trace with hash -172641802, now seen corresponding path program 5 times [2024-11-13 14:58:33,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:33,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930714363] [2024-11-13 14:58:33,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:33,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:34,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:34,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930714363] [2024-11-13 14:58:34,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930714363] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:58:34,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682143508] [2024-11-13 14:58:34,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 14:58:34,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:34,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:58:34,332 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:58:34,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 14:58:34,457 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-13 14:58:34,457 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:58:34,459 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-13 14:58:34,462 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:58:34,667 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 14:58:34,892 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:34,892 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:58:34,920 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 18 treesize of output 16 [2024-11-13 14:58:34,923 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 14:58:35,053 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:35,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682143508] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:58:35,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:58:35,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 27 [2024-11-13 14:58:35,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522573781] [2024-11-13 14:58:35,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:58:35,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-13 14:58:35,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:35,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-13 14:58:35,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2024-11-13 14:58:35,055 INFO L87 Difference]: Start difference. First operand 168 states and 193 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:36,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:36,960 INFO L93 Difference]: Finished difference Result 348 states and 387 transitions. [2024-11-13 14:58:36,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-13 14:58:36,961 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-11-13 14:58:36,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:36,962 INFO L225 Difference]: With dead ends: 348 [2024-11-13 14:58:36,962 INFO L226 Difference]: Without dead ends: 289 [2024-11-13 14:58:36,963 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=188, Invalid=1974, Unknown=0, NotChecked=0, Total=2162 [2024-11-13 14:58:36,963 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 123 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:36,963 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 1086 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-13 14:58:36,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-11-13 14:58:36,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 216. [2024-11-13 14:58:36,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 212 states have (on average 1.1650943396226414) internal successors, (247), 215 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:36,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 247 transitions. [2024-11-13 14:58:36,981 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 247 transitions. Word has length 31 [2024-11-13 14:58:36,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:36,981 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 247 transitions. [2024-11-13 14:58:36,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:36,982 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 247 transitions. [2024-11-13 14:58:36,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-13 14:58:36,982 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:36,983 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] [2024-11-13 14:58:37,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 14:58:37,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:37,183 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:37,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:37,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1852598688, now seen corresponding path program 1 times [2024-11-13 14:58:37,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:37,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510539382] [2024-11-13 14:58:37,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:37,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:37,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:58:37,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:37,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510539382] [2024-11-13 14:58:37,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510539382] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:58:37,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584714041] [2024-11-13 14:58:37,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:37,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:37,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:58:37,703 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:58:37,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 14:58:37,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:37,827 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-13 14:58:37,829 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:58:37,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:58:37,892 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 14:58:37,901 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 14:58:38,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:58:38,536 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:58:39,177 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:58:39,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:58:39,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584714041] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:58:39,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:58:39,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 32 [2024-11-13 14:58:39,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336904712] [2024-11-13 14:58:39,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:58:39,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-13 14:58:39,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:39,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-13 14:58:39,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2024-11-13 14:58:39,317 INFO L87 Difference]: Start difference. First operand 216 states and 247 transitions. Second operand has 33 states, 32 states have (on average 3.03125) internal successors, (97), 33 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 14:58:40,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:40,184 INFO L93 Difference]: Finished difference Result 277 states and 309 transitions. [2024-11-13 14:58:40,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-13 14:58:40,185 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.03125) internal successors, (97), 33 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) Word has length 33 [2024-11-13 14:58:40,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:40,186 INFO L225 Difference]: With dead ends: 277 [2024-11-13 14:58:40,186 INFO L226 Difference]: Without dead ends: 273 [2024-11-13 14:58:40,187 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2024-11-13 14:58:40,187 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 75 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:40,187 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 211 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 14:58:40,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2024-11-13 14:58:40,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 222. [2024-11-13 14:58:40,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 218 states have (on average 1.1697247706422018) internal successors, (255), 221 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:40,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 255 transitions. [2024-11-13 14:58:40,194 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 255 transitions. Word has length 33 [2024-11-13 14:58:40,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:40,194 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 255 transitions. [2024-11-13 14:58:40,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.03125) internal successors, (97), 33 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 14:58:40,194 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 255 transitions. [2024-11-13 14:58:40,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-13 14:58:40,195 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:40,195 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:40,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 14:58:40,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:40,396 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:40,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:40,396 INFO L85 PathProgramCache]: Analyzing trace with hash -117563698, now seen corresponding path program 2 times [2024-11-13 14:58:40,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:40,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223332492] [2024-11-13 14:58:40,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:40,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:40,816 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:40,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:40,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223332492] [2024-11-13 14:58:40,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223332492] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:58:40,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160192912] [2024-11-13 14:58:40,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:58:40,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:40,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:58:40,819 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:58:40,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 14:58:40,945 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:58:40,946 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:58:40,948 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-13 14:58:40,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:58:41,254 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:41,255 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:58:41,538 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 23 treesize of output 19 [2024-11-13 14:58:41,804 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:41,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160192912] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:58:41,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:58:41,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2024-11-13 14:58:41,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639956302] [2024-11-13 14:58:41,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:58:41,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-13 14:58:41,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:41,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-13 14:58:41,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2024-11-13 14:58:41,808 INFO L87 Difference]: Start difference. First operand 222 states and 255 transitions. Second operand has 31 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:42,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:42,363 INFO L93 Difference]: Finished difference Result 319 states and 358 transitions. [2024-11-13 14:58:42,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 14:58:42,363 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-13 14:58:42,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:42,365 INFO L225 Difference]: With dead ends: 319 [2024-11-13 14:58:42,365 INFO L226 Difference]: Without dead ends: 315 [2024-11-13 14:58:42,366 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2024-11-13 14:58:42,367 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 107 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:42,367 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 641 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 14:58:42,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2024-11-13 14:58:42,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 242. [2024-11-13 14:58:42,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 238 states have (on average 1.1638655462184875) internal successors, (277), 241 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:42,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 277 transitions. [2024-11-13 14:58:42,375 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 277 transitions. Word has length 34 [2024-11-13 14:58:42,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:42,375 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 277 transitions. [2024-11-13 14:58:42,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:42,375 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 277 transitions. [2024-11-13 14:58:42,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-13 14:58:42,377 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:42,377 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:42,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 14:58:42,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:42,579 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:42,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:42,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1584323223, now seen corresponding path program 6 times [2024-11-13 14:58:42,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:42,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604532916] [2024-11-13 14:58:42,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:42,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:42,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:43,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:43,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604532916] [2024-11-13 14:58:43,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604532916] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:58:43,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141757915] [2024-11-13 14:58:43,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 14:58:43,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:43,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:58:43,349 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:58:43,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 14:58:43,503 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-13 14:58:43,503 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:58:43,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-13 14:58:43,508 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:58:43,688 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 14:58:43,969 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:43,969 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:58:44,015 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 18 treesize of output 16 [2024-11-13 14:58:44,017 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 14:58:44,161 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:44,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141757915] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:58:44,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:58:44,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 31 [2024-11-13 14:58:44,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91873381] [2024-11-13 14:58:44,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:58:44,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-13 14:58:44,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:44,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-13 14:58:44,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2024-11-13 14:58:44,162 INFO L87 Difference]: Start difference. First operand 242 states and 277 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:45,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:45,955 INFO L93 Difference]: Finished difference Result 449 states and 496 transitions. [2024-11-13 14:58:45,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-13 14:58:45,956 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-13 14:58:45,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:45,957 INFO L225 Difference]: With dead ends: 449 [2024-11-13 14:58:45,957 INFO L226 Difference]: Without dead ends: 384 [2024-11-13 14:58:45,958 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=221, Invalid=2641, Unknown=0, NotChecked=0, Total=2862 [2024-11-13 14:58:45,958 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 125 mSDsluCounter, 1307 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1375 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:45,959 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 1375 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1514 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-13 14:58:45,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2024-11-13 14:58:45,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 295. [2024-11-13 14:58:45,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 291 states have (on average 1.1580756013745706) internal successors, (337), 294 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:45,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 337 transitions. [2024-11-13 14:58:45,966 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 337 transitions. Word has length 36 [2024-11-13 14:58:45,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:45,967 INFO L471 AbstractCegarLoop]: Abstraction has 295 states and 337 transitions. [2024-11-13 14:58:45,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:45,967 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 337 transitions. [2024-11-13 14:58:45,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-13 14:58:45,967 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:45,968 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-13 14:58:45,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 14:58:46,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-13 14:58:46,171 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:46,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:46,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1792997749, now seen corresponding path program 2 times [2024-11-13 14:58:46,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:46,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559194510] [2024-11-13 14:58:46,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:46,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:46,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:46,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559194510] [2024-11-13 14:58:46,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559194510] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:58:46,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424825655] [2024-11-13 14:58:46,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:58:46,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:46,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:58:46,614 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:58:46,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 14:58:46,749 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:58:46,749 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:58:46,751 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-13 14:58:46,753 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:58:46,848 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 14:58:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:58:46,972 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:58:47,010 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 15 treesize of output 13 [2024-11-13 14:58:47,013 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 14:58:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:58:47,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424825655] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:58:47,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:58:47,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 24 [2024-11-13 14:58:47,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462460655] [2024-11-13 14:58:47,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:58:47,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-13 14:58:47,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:47,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-13 14:58:47,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2024-11-13 14:58:47,092 INFO L87 Difference]: Start difference. First operand 295 states and 337 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:47,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:47,412 INFO L93 Difference]: Finished difference Result 477 states and 538 transitions. [2024-11-13 14:58:47,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-13 14:58:47,413 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-13 14:58:47,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:47,414 INFO L225 Difference]: With dead ends: 477 [2024-11-13 14:58:47,414 INFO L226 Difference]: Without dead ends: 404 [2024-11-13 14:58:47,414 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2024-11-13 14:58:47,415 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:47,415 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 313 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 14:58:47,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2024-11-13 14:58:47,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 353. [2024-11-13 14:58:47,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 349 states have (on average 1.146131805157593) internal successors, (400), 352 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:47,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 400 transitions. [2024-11-13 14:58:47,423 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 400 transitions. Word has length 36 [2024-11-13 14:58:47,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:47,423 INFO L471 AbstractCegarLoop]: Abstraction has 353 states and 400 transitions. [2024-11-13 14:58:47,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:47,423 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 400 transitions. [2024-11-13 14:58:47,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-13 14:58:47,424 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:47,424 INFO L215 NwaCegarLoop]: trace histogram [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 14:58:47,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-13 14:58:47,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-13 14:58:47,629 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:47,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:47,629 INFO L85 PathProgramCache]: Analyzing trace with hash -2093339187, now seen corresponding path program 1 times [2024-11-13 14:58:47,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:47,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211453890] [2024-11-13 14:58:47,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:47,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:58:48,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:48,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211453890] [2024-11-13 14:58:48,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211453890] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:58:48,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982223362] [2024-11-13 14:58:48,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:48,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:48,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:58:48,146 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:58:48,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 14:58:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:48,275 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-13 14:58:48,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:58:48,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:58:48,306 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 14:58:48,315 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 14:58:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:58:49,183 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:58:50,088 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:58:50,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982223362] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:58:50,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:58:50,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 34 [2024-11-13 14:58:50,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607657380] [2024-11-13 14:58:50,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:58:50,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-13 14:58:50,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:50,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-13 14:58:50,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2024-11-13 14:58:50,090 INFO L87 Difference]: Start difference. First operand 353 states and 400 transitions. Second operand has 35 states, 34 states have (on average 3.2058823529411766) internal successors, (109), 35 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:51,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:51,525 INFO L93 Difference]: Finished difference Result 462 states and 511 transitions. [2024-11-13 14:58:51,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-13 14:58:51,526 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.2058823529411766) internal successors, (109), 35 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-11-13 14:58:51,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:51,527 INFO L225 Difference]: With dead ends: 462 [2024-11-13 14:58:51,527 INFO L226 Difference]: Without dead ends: 436 [2024-11-13 14:58:51,528 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=346, Invalid=2204, Unknown=0, NotChecked=0, Total=2550 [2024-11-13 14:58:51,528 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 144 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:51,528 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 543 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 14:58:51,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2024-11-13 14:58:51,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 365. [2024-11-13 14:58:51,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 361 states have (on average 1.1412742382271468) internal successors, (412), 364 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:51,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 412 transitions. [2024-11-13 14:58:51,538 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 412 transitions. Word has length 38 [2024-11-13 14:58:51,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:51,538 INFO L471 AbstractCegarLoop]: Abstraction has 365 states and 412 transitions. [2024-11-13 14:58:51,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.2058823529411766) internal successors, (109), 35 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:51,538 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 412 transitions. [2024-11-13 14:58:51,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-13 14:58:51,539 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:51,539 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:51,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 14:58:51,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-13 14:58:51,740 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:51,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:51,740 INFO L85 PathProgramCache]: Analyzing trace with hash 658702225, now seen corresponding path program 3 times [2024-11-13 14:58:51,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:51,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277900592] [2024-11-13 14:58:51,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:51,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:52,189 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:52,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:52,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277900592] [2024-11-13 14:58:52,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277900592] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:58:52,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509240640] [2024-11-13 14:58:52,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:58:52,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:52,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:58:52,193 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:58:52,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 14:58:52,361 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-13 14:58:52,361 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:58:52,363 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-13 14:58:52,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:58:52,788 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 22 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:52,788 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:58:53,135 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 8 treesize of output 6 [2024-11-13 14:58:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 22 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:53,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509240640] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:58:53,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:58:53,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 36 [2024-11-13 14:58:53,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394263522] [2024-11-13 14:58:53,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:58:53,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-13 14:58:53,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:53,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-13 14:58:53,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2024-11-13 14:58:53,252 INFO L87 Difference]: Start difference. First operand 365 states and 412 transitions. Second operand has 37 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 37 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:53,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:53,926 INFO L93 Difference]: Finished difference Result 501 states and 555 transitions. [2024-11-13 14:58:53,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 14:58:53,927 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 37 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-13 14:58:53,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:53,928 INFO L225 Difference]: With dead ends: 501 [2024-11-13 14:58:53,929 INFO L226 Difference]: Without dead ends: 489 [2024-11-13 14:58:53,929 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=212, Invalid=1194, Unknown=0, NotChecked=0, Total=1406 [2024-11-13 14:58:53,930 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 161 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:53,930 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 911 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 14:58:53,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2024-11-13 14:58:53,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 361. [2024-11-13 14:58:53,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 357 states have (on average 1.145658263305322) internal successors, (409), 360 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:53,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 409 transitions. [2024-11-13 14:58:53,938 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 409 transitions. Word has length 39 [2024-11-13 14:58:53,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:53,938 INFO L471 AbstractCegarLoop]: Abstraction has 361 states and 409 transitions. [2024-11-13 14:58:53,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 37 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:53,939 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 409 transitions. [2024-11-13 14:58:53,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-13 14:58:53,940 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:53,940 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:53,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-13 14:58:54,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-13 14:58:54,144 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:54,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:54,145 INFO L85 PathProgramCache]: Analyzing trace with hash 993114664, now seen corresponding path program 7 times [2024-11-13 14:58:54,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:54,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385528083] [2024-11-13 14:58:54,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:54,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 12 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:54,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:54,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385528083] [2024-11-13 14:58:54,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385528083] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:58:54,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142777500] [2024-11-13 14:58:54,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 14:58:54,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:54,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:58:54,983 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:58:54,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 14:58:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:55,121 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-13 14:58:55,123 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:58:55,360 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 14:58:55,695 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:55,695 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:58:55,727 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 18 treesize of output 16 [2024-11-13 14:58:55,730 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 14:58:55,847 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:58:55,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142777500] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:58:55,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:58:55,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 35 [2024-11-13 14:58:55,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607569969] [2024-11-13 14:58:55,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:58:55,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-13 14:58:55,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:55,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-13 14:58:55,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1107, Unknown=0, NotChecked=0, Total=1190 [2024-11-13 14:58:55,849 INFO L87 Difference]: Start difference. First operand 361 states and 409 transitions. Second operand has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 35 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:58,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:58,075 INFO L93 Difference]: Finished difference Result 620 states and 682 transitions. [2024-11-13 14:58:58,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-13 14:58:58,076 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 35 states have internal predecessors, (82), 0 states have call successors, (0), 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 41 [2024-11-13 14:58:58,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:58,078 INFO L225 Difference]: With dead ends: 620 [2024-11-13 14:58:58,078 INFO L226 Difference]: Without dead ends: 549 [2024-11-13 14:58:58,079 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=262, Invalid=3520, Unknown=0, NotChecked=0, Total=3782 [2024-11-13 14:58:58,079 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 134 mSDsluCounter, 1732 mSDsCounter, 0 mSdLazyCounter, 2043 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1806 SdHoareTripleChecker+Invalid, 2066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:58,079 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 1806 Invalid, 2066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2043 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-13 14:58:58,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2024-11-13 14:58:58,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 426. [2024-11-13 14:58:58,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 422 states have (on average 1.1421800947867298) internal successors, (482), 425 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:58,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 482 transitions. [2024-11-13 14:58:58,088 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 482 transitions. Word has length 41 [2024-11-13 14:58:58,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:58,088 INFO L471 AbstractCegarLoop]: Abstraction has 426 states and 482 transitions. [2024-11-13 14:58:58,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 35 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:58,088 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 482 transitions. [2024-11-13 14:58:58,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-13 14:58:58,089 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:58,089 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:58:58,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-13 14:58:58,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-13 14:58:58,289 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:58,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:58,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1652440007, now seen corresponding path program 3 times [2024-11-13 14:58:58,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:58,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674798136] [2024-11-13 14:58:58,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:58,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:58,613 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:58:58,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:58,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674798136] [2024-11-13 14:58:58,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674798136] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:58:58,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536278037] [2024-11-13 14:58:58,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:58:58,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:58,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:58:58,616 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:58:58,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 14:58:58,792 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 14:58:58,792 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:58:58,794 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-13 14:58:58,795 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:58:58,970 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:58:58,971 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:58:59,217 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 14:58:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:58:59,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536278037] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:58:59,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:58:59,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2024-11-13 14:58:59,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176626279] [2024-11-13 14:58:59,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:58:59,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-13 14:58:59,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:59,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-13 14:58:59,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2024-11-13 14:58:59,274 INFO L87 Difference]: Start difference. First operand 426 states and 482 transitions. Second operand has 27 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 27 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 14:58:59,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:59,674 INFO L93 Difference]: Finished difference Result 489 states and 543 transitions. [2024-11-13 14:58:59,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 14:58:59,675 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 27 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 42 [2024-11-13 14:58:59,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:59,677 INFO L225 Difference]: With dead ends: 489 [2024-11-13 14:58:59,677 INFO L226 Difference]: Without dead ends: 489 [2024-11-13 14:58:59,678 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2024-11-13 14:58:59,678 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 28 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:59,678 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 395 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 14:58:59,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2024-11-13 14:58:59,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 451. [2024-11-13 14:58:59,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 447 states have (on average 1.1319910514541387) internal successors, (506), 450 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:58:59,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 506 transitions. [2024-11-13 14:58:59,686 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 506 transitions. Word has length 42 [2024-11-13 14:58:59,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:59,686 INFO L471 AbstractCegarLoop]: Abstraction has 451 states and 506 transitions. [2024-11-13 14:58:59,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 27 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 14:58:59,687 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 506 transitions. [2024-11-13 14:58:59,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-13 14:58:59,688 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:59,688 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-13 14:58:59,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-13 14:58:59,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-13 14:58:59,888 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:58:59,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:59,889 INFO L85 PathProgramCache]: Analyzing trace with hash -798779602, now seen corresponding path program 2 times [2024-11-13 14:58:59,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:59,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49212605] [2024-11-13 14:58:59,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:59,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:00,526 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:59:00,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:59:00,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49212605] [2024-11-13 14:59:00,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49212605] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:59:00,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882616751] [2024-11-13 14:59:00,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:59:00,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:59:00,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:59:00,528 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:59:00,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-13 14:59:00,672 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:59:00,672 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:59:00,674 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-13 14:59:00,677 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:59:00,743 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2024-11-13 14:59:00,743 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 1 case distinctions, treesize of input 13 treesize of output 11 [2024-11-13 14:59:00,763 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 14:59:01,741 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:59:01,741 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:59:02,668 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:59:02,767 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:59:02,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882616751] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:59:02,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:59:02,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 17] total 45 [2024-11-13 14:59:02,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091126933] [2024-11-13 14:59:02,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:59:02,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-13 14:59:02,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:59:02,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-13 14:59:02,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1791, Unknown=0, NotChecked=0, Total=2070 [2024-11-13 14:59:02,769 INFO L87 Difference]: Start difference. First operand 451 states and 506 transitions. Second operand has 46 states, 45 states have (on average 2.8222222222222224) internal successors, (127), 46 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:59:04,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:59:04,730 INFO L93 Difference]: Finished difference Result 649 states and 705 transitions. [2024-11-13 14:59:04,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-13 14:59:04,730 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.8222222222222224) internal successors, (127), 46 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-11-13 14:59:04,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:59:04,732 INFO L225 Difference]: With dead ends: 649 [2024-11-13 14:59:04,732 INFO L226 Difference]: Without dead ends: 621 [2024-11-13 14:59:04,734 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=682, Invalid=4148, Unknown=0, NotChecked=0, Total=4830 [2024-11-13 14:59:04,734 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 175 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 1432 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:59:04,734 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 595 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1432 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-13 14:59:04,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2024-11-13 14:59:04,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 471. [2024-11-13 14:59:04,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 467 states have (on average 1.1284796573875804) internal successors, (527), 470 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:59:04,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 527 transitions. [2024-11-13 14:59:04,744 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 527 transitions. Word has length 43 [2024-11-13 14:59:04,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:59:04,744 INFO L471 AbstractCegarLoop]: Abstraction has 471 states and 527 transitions. [2024-11-13 14:59:04,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.8222222222222224) internal successors, (127), 46 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:59:04,745 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 527 transitions. [2024-11-13 14:59:04,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 14:59:04,745 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:59:04,746 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:59:04,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-13 14:59:04,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:59:04,946 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:59:04,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:59:04,947 INFO L85 PathProgramCache]: Analyzing trace with hash -522585856, now seen corresponding path program 4 times [2024-11-13 14:59:04,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:59:04,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360849559] [2024-11-13 14:59:04,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:59:04,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:59:04,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:05,408 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 22 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:59:05,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:59:05,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360849559] [2024-11-13 14:59:05,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360849559] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:59:05,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361601681] [2024-11-13 14:59:05,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:59:05,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:59:05,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:59:05,411 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:59:05,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-13 14:59:05,623 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:59:05,624 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:59:05,626 INFO L255 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-13 14:59:05,629 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:59:05,929 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 35 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:59:05,930 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:59:06,246 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 23 treesize of output 19 [2024-11-13 14:59:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 35 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:59:06,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361601681] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:59:06,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:59:06,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2024-11-13 14:59:06,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835076533] [2024-11-13 14:59:06,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:59:06,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-13 14:59:06,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:59:06,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-13 14:59:06,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1416, Unknown=0, NotChecked=0, Total=1640 [2024-11-13 14:59:06,553 INFO L87 Difference]: Start difference. First operand 471 states and 527 transitions. Second operand has 41 states, 40 states have (on average 2.775) internal successors, (111), 41 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 14:59:07,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:59:07,386 INFO L93 Difference]: Finished difference Result 640 states and 703 transitions. [2024-11-13 14:59:07,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 14:59:07,387 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.775) internal successors, (111), 41 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 44 [2024-11-13 14:59:07,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:59:07,390 INFO L225 Difference]: With dead ends: 640 [2024-11-13 14:59:07,391 INFO L226 Difference]: Without dead ends: 628 [2024-11-13 14:59:07,391 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=246, Invalid=1476, Unknown=0, NotChecked=0, Total=1722 [2024-11-13 14:59:07,392 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 140 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 1504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 14:59:07,392 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 1055 Invalid, 1504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1481 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 14:59:07,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2024-11-13 14:59:07,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 470. [2024-11-13 14:59:07,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 466 states have (on average 1.1309012875536482) internal successors, (527), 469 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:59:07,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 527 transitions. [2024-11-13 14:59:07,404 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 527 transitions. Word has length 44 [2024-11-13 14:59:07,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:59:07,404 INFO L471 AbstractCegarLoop]: Abstraction has 470 states and 527 transitions. [2024-11-13 14:59:07,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.775) internal successors, (111), 41 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 14:59:07,405 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 527 transitions. [2024-11-13 14:59:07,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-13 14:59:07,405 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:59:07,406 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:59:07,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-13 14:59:07,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-13 14:59:07,608 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:59:07,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:59:07,609 INFO L85 PathProgramCache]: Analyzing trace with hash 58019995, now seen corresponding path program 8 times [2024-11-13 14:59:07,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:59:07,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600665429] [2024-11-13 14:59:07,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:59:07,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:59:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:08,478 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:59:08,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:59:08,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600665429] [2024-11-13 14:59:08,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600665429] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:59:08,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045071461] [2024-11-13 14:59:08,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:59:08,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:59:08,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:59:08,481 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:59:08,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-13 14:59:08,639 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:59:08,639 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:59:08,641 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-13 14:59:08,644 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:59:08,914 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 14:59:09,266 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:59:09,266 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:59:09,300 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 18 treesize of output 16 [2024-11-13 14:59:09,302 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 14:59:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:59:09,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045071461] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:59:09,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:59:09,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 39 [2024-11-13 14:59:09,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396433169] [2024-11-13 14:59:09,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:59:09,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-13 14:59:09,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:59:09,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-13 14:59:09,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1388, Unknown=0, NotChecked=0, Total=1482 [2024-11-13 14:59:09,458 INFO L87 Difference]: Start difference. First operand 470 states and 527 transitions. Second operand has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 39 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 14:59:12,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:59:12,844 INFO L93 Difference]: Finished difference Result 784 states and 856 transitions. [2024-11-13 14:59:12,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-13 14:59:12,845 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 39 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 46 [2024-11-13 14:59:12,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:59:12,847 INFO L225 Difference]: With dead ends: 784 [2024-11-13 14:59:12,847 INFO L226 Difference]: Without dead ends: 707 [2024-11-13 14:59:12,848 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=311, Invalid=4659, Unknown=0, NotChecked=0, Total=4970 [2024-11-13 14:59:12,852 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 153 mSDsluCounter, 1988 mSDsCounter, 0 mSdLazyCounter, 2459 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 2067 SdHoareTripleChecker+Invalid, 2486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-13 14:59:12,852 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 2067 Invalid, 2486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2459 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-13 14:59:12,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2024-11-13 14:59:12,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 532. [2024-11-13 14:59:12,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 528 states have (on average 1.125) internal successors, (594), 531 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:59:12,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 594 transitions. [2024-11-13 14:59:12,864 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 594 transitions. Word has length 46 [2024-11-13 14:59:12,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:59:12,866 INFO L471 AbstractCegarLoop]: Abstraction has 532 states and 594 transitions. [2024-11-13 14:59:12,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 39 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 14:59:12,866 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 594 transitions. [2024-11-13 14:59:12,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-13 14:59:12,868 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:59:12,868 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:59:12,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-13 14:59:13,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-13 14:59:13,068 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:59:13,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:59:13,069 INFO L85 PathProgramCache]: Analyzing trace with hash -600720943, now seen corresponding path program 3 times [2024-11-13 14:59:13,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:59:13,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721812236] [2024-11-13 14:59:13,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:59:13,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:59:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:13,867 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:59:13,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:59:13,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721812236] [2024-11-13 14:59:13,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721812236] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:59:13,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994771847] [2024-11-13 14:59:13,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:59:13,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:59:13,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:59:13,869 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:59:13,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-13 14:59:14,041 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 14:59:14,041 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:59:14,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-13 14:59:14,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:59:14,099 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 10 treesize of output 8 [2024-11-13 14:59:14,114 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 14:59:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:59:15,617 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:59:16,651 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:59:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:59:16,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994771847] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:59:16,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:59:16,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 46 [2024-11-13 14:59:16,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442950052] [2024-11-13 14:59:16,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:59:16,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-13 14:59:16,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:59:16,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-13 14:59:16,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1904, Unknown=0, NotChecked=0, Total=2162 [2024-11-13 14:59:16,836 INFO L87 Difference]: Start difference. First operand 532 states and 594 transitions. Second operand has 47 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 47 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 14:59:19,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:59:19,407 INFO L93 Difference]: Finished difference Result 730 states and 799 transitions. [2024-11-13 14:59:19,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-13 14:59:19,407 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 47 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 47 [2024-11-13 14:59:19,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:59:19,409 INFO L225 Difference]: With dead ends: 730 [2024-11-13 14:59:19,409 INFO L226 Difference]: Without dead ends: 728 [2024-11-13 14:59:19,410 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1408 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=753, Invalid=4947, Unknown=0, NotChecked=0, Total=5700 [2024-11-13 14:59:19,411 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 182 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:59:19,411 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 268 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-13 14:59:19,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2024-11-13 14:59:19,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 537. [2024-11-13 14:59:19,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 533 states have (on average 1.1313320825515947) internal successors, (603), 536 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:59:19,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 603 transitions. [2024-11-13 14:59:19,420 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 603 transitions. Word has length 47 [2024-11-13 14:59:19,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:59:19,420 INFO L471 AbstractCegarLoop]: Abstraction has 537 states and 603 transitions. [2024-11-13 14:59:19,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 47 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 14:59:19,420 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 603 transitions. [2024-11-13 14:59:19,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-13 14:59:19,421 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:59:19,421 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:59:19,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-13 14:59:19,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-13 14:59:19,622 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:59:19,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:59:19,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1476765861, now seen corresponding path program 2 times [2024-11-13 14:59:19,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:59:19,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801904247] [2024-11-13 14:59:19,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:59:19,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:59:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:20,371 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:59:20,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:59:20,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801904247] [2024-11-13 14:59:20,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801904247] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:59:20,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483212952] [2024-11-13 14:59:20,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:59:20,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:59:20,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:59:20,373 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:59:20,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-13 14:59:20,556 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:59:20,557 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:59:20,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-11-13 14:59:20,563 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:59:20,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:59:20,576 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 14:59:20,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-13 14:59:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:59:21,563 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:59:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:59:22,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483212952] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:59:22,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:59:22,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 47 [2024-11-13 14:59:22,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271751195] [2024-11-13 14:59:22,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:59:22,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-13 14:59:22,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:59:22,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-13 14:59:22,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=2026, Unknown=0, NotChecked=0, Total=2256 [2024-11-13 14:59:22,912 INFO L87 Difference]: Start difference. First operand 537 states and 603 transitions. Second operand has 48 states, 47 states have (on average 2.9361702127659575) internal successors, (138), 48 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:59:26,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:59:26,939 INFO L93 Difference]: Finished difference Result 810 states and 882 transitions. [2024-11-13 14:59:26,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-13 14:59:26,939 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.9361702127659575) internal successors, (138), 48 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-11-13 14:59:26,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:59:26,941 INFO L225 Difference]: With dead ends: 810 [2024-11-13 14:59:26,941 INFO L226 Difference]: Without dead ends: 780 [2024-11-13 14:59:26,942 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=685, Invalid=5477, Unknown=0, NotChecked=0, Total=6162 [2024-11-13 14:59:26,943 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 268 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 2779 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 2849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 2779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:59:26,943 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 1306 Invalid, 2849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 2779 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-13 14:59:26,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2024-11-13 14:59:26,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 521. [2024-11-13 14:59:26,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 517 states have (on average 1.1315280464216635) internal successors, (585), 520 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:59:26,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 585 transitions. [2024-11-13 14:59:26,951 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 585 transitions. Word has length 48 [2024-11-13 14:59:26,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:59:26,951 INFO L471 AbstractCegarLoop]: Abstraction has 521 states and 585 transitions. [2024-11-13 14:59:26,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.9361702127659575) internal successors, (138), 48 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:59:26,952 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 585 transitions. [2024-11-13 14:59:26,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-13 14:59:26,952 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:59:26,953 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:59:26,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-13 14:59:27,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-13 14:59:27,158 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:59:27,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:59:27,158 INFO L85 PathProgramCache]: Analyzing trace with hash -152007733, now seen corresponding path program 4 times [2024-11-13 14:59:27,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:59:27,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034317662] [2024-11-13 14:59:27,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:59:27,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:59:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:27,993 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:59:27,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:59:27,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034317662] [2024-11-13 14:59:27,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034317662] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:59:27,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841744609] [2024-11-13 14:59:27,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:59:27,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:59:27,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:59:27,995 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:59:27,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-13 14:59:28,151 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:59:28,151 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:59:28,153 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-13 14:59:28,154 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:59:28,314 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 14:59:29,216 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-11-13 14:59:29,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 38 treesize of output 26 [2024-11-13 14:59:29,223 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:59:29,223 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:59:29,829 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 14:59:29,837 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:59:29,837 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 44 treesize of output 34 [2024-11-13 14:59:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 27 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:59:30,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841744609] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:59:30,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:59:30,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 47 [2024-11-13 14:59:30,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930590028] [2024-11-13 14:59:30,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:59:30,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-13 14:59:30,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:59:30,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-13 14:59:30,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1960, Unknown=0, NotChecked=0, Total=2162 [2024-11-13 14:59:30,085 INFO L87 Difference]: Start difference. First operand 521 states and 585 transitions. Second operand has 47 states, 47 states have (on average 2.297872340425532) internal successors, (108), 47 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:59:32,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:59:32,003 INFO L93 Difference]: Finished difference Result 853 states and 943 transitions. [2024-11-13 14:59:32,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-13 14:59:32,003 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.297872340425532) internal successors, (108), 47 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-11-13 14:59:32,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:59:32,005 INFO L225 Difference]: With dead ends: 853 [2024-11-13 14:59:32,005 INFO L226 Difference]: Without dead ends: 677 [2024-11-13 14:59:32,006 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=492, Invalid=4910, Unknown=0, NotChecked=0, Total=5402 [2024-11-13 14:59:32,006 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 96 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 14:59:32,006 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 450 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 14:59:32,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2024-11-13 14:59:32,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 603. [2024-11-13 14:59:32,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 599 states have (on average 1.1235392320534223) internal successors, (673), 602 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:59:32,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 673 transitions. [2024-11-13 14:59:32,011 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 673 transitions. Word has length 48 [2024-11-13 14:59:32,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:59:32,012 INFO L471 AbstractCegarLoop]: Abstraction has 603 states and 673 transitions. [2024-11-13 14:59:32,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.297872340425532) internal successors, (108), 47 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:59:32,012 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 673 transitions. [2024-11-13 14:59:32,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 14:59:32,013 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:59:32,013 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:59:32,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-13 14:59:32,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:59:32,213 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:59:32,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:59:32,214 INFO L85 PathProgramCache]: Analyzing trace with hash -472213309, now seen corresponding path program 5 times [2024-11-13 14:59:32,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:59:32,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556548096] [2024-11-13 14:59:32,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:59:32,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:59:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:32,647 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 35 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:59:32,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:59:32,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556548096] [2024-11-13 14:59:32,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556548096] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:59:32,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869937323] [2024-11-13 14:59:32,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 14:59:32,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:59:32,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:59:32,650 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:59:32,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-13 14:59:32,882 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-13 14:59:32,883 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:59:32,886 INFO L255 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-11-13 14:59:32,890 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:59:33,256 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 51 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:59:33,257 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:59:33,582 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 23 treesize of output 19 [2024-11-13 14:59:33,945 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 51 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:59:33,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869937323] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:59:33,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:59:33,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2024-11-13 14:59:33,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698232504] [2024-11-13 14:59:33,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:59:33,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-13 14:59:33,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:59:33,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-13 14:59:33,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1789, Unknown=0, NotChecked=0, Total=2070 [2024-11-13 14:59:33,947 INFO L87 Difference]: Start difference. First operand 603 states and 673 transitions. Second operand has 46 states, 45 states have (on average 2.7555555555555555) internal successors, (124), 46 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:59:34,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:59:34,830 INFO L93 Difference]: Finished difference Result 846 states and 929 transitions. [2024-11-13 14:59:34,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-13 14:59:34,830 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.7555555555555555) internal successors, (124), 46 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-11-13 14:59:34,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:59:34,832 INFO L225 Difference]: With dead ends: 846 [2024-11-13 14:59:34,833 INFO L226 Difference]: Without dead ends: 828 [2024-11-13 14:59:34,833 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=306, Invalid=1856, Unknown=0, NotChecked=0, Total=2162 [2024-11-13 14:59:34,833 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 154 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 1527 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 14:59:34,833 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 972 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1527 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 14:59:34,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2024-11-13 14:59:34,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 601. [2024-11-13 14:59:34,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 597 states have (on average 1.1256281407035176) internal successors, (672), 600 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:59:34,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 672 transitions. [2024-11-13 14:59:34,841 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 672 transitions. Word has length 49 [2024-11-13 14:59:34,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:59:34,842 INFO L471 AbstractCegarLoop]: Abstraction has 601 states and 672 transitions. [2024-11-13 14:59:34,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.7555555555555555) internal successors, (124), 46 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:59:34,842 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 672 transitions. [2024-11-13 14:59:34,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-13 14:59:34,843 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:59:34,843 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:59:34,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-13 14:59:35,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-13 14:59:35,047 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:59:35,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:59:35,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1822632282, now seen corresponding path program 9 times [2024-11-13 14:59:35,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:59:35,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062556893] [2024-11-13 14:59:35,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:59:35,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:59:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:36,066 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 35 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:59:36,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:59:36,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062556893] [2024-11-13 14:59:36,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062556893] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:59:36,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742188972] [2024-11-13 14:59:36,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:59:36,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:59:36,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:59:36,069 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:59:36,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-13 14:59:36,308 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-13 14:59:36,308 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:59:36,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-11-13 14:59:36,315 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:59:36,668 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 14:59:37,072 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:59:37,072 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:59:37,107 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 18 treesize of output 16 [2024-11-13 14:59:37,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-13 14:59:37,253 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:59:37,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742188972] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:59:37,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:59:37,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 43 [2024-11-13 14:59:37,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004138499] [2024-11-13 14:59:37,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:59:37,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-13 14:59:37,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:59:37,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-13 14:59:37,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1698, Unknown=0, NotChecked=0, Total=1806 [2024-11-13 14:59:37,255 INFO L87 Difference]: Start difference. First operand 601 states and 672 transitions. Second operand has 43 states, 43 states have (on average 2.372093023255814) internal successors, (102), 43 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:59:40,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:59:40,580 INFO L93 Difference]: Finished difference Result 1004 states and 1096 transitions. [2024-11-13 14:59:40,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-13 14:59:40,580 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.372093023255814) internal successors, (102), 43 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2024-11-13 14:59:40,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:59:40,582 INFO L225 Difference]: With dead ends: 1004 [2024-11-13 14:59:40,582 INFO L226 Difference]: Without dead ends: 921 [2024-11-13 14:59:40,582 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=353, Invalid=5653, Unknown=0, NotChecked=0, Total=6006 [2024-11-13 14:59:40,583 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 157 mSDsluCounter, 2565 mSDsCounter, 0 mSdLazyCounter, 3194 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 2650 SdHoareTripleChecker+Invalid, 3225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 3194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-13 14:59:40,583 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 2650 Invalid, 3225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 3194 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-13 14:59:40,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2024-11-13 14:59:40,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 681. [2024-11-13 14:59:40,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 677 states have (on average 1.1240768094534712) internal successors, (761), 680 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:59:40,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 761 transitions. [2024-11-13 14:59:40,592 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 761 transitions. Word has length 51 [2024-11-13 14:59:40,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:59:40,592 INFO L471 AbstractCegarLoop]: Abstraction has 681 states and 761 transitions. [2024-11-13 14:59:40,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.372093023255814) internal successors, (102), 43 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:59:40,592 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 761 transitions. [2024-11-13 14:59:40,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-13 14:59:40,593 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:59:40,593 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 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 14:59:40,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-13 14:59:40,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-13 14:59:40,794 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:59:40,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:59:40,794 INFO L85 PathProgramCache]: Analyzing trace with hash -2079449668, now seen corresponding path program 4 times [2024-11-13 14:59:40,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:59:40,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398779066] [2024-11-13 14:59:40,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:59:40,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:59:40,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:41,457 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 12 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:59:41,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:59:41,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398779066] [2024-11-13 14:59:41,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398779066] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:59:41,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311594936] [2024-11-13 14:59:41,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:59:41,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:59:41,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:59:41,459 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:59:41,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-13 14:59:41,669 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:59:41,670 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:59:41,672 INFO L255 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-11-13 14:59:41,675 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:59:41,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:59:41,740 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 14:59:41,745 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 14:59:42,781 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 22 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:59:42,782 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:59:43,902 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:59:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:59:44,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311594936] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:59:44,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:59:44,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 53 [2024-11-13 14:59:44,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051341431] [2024-11-13 14:59:44,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:59:44,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-13 14:59:44,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:59:44,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-13 14:59:44,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=2482, Unknown=0, NotChecked=0, Total=2862 [2024-11-13 14:59:44,018 INFO L87 Difference]: Start difference. First operand 681 states and 761 transitions. Second operand has 54 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 54 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:59:45,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:59:45,930 INFO L93 Difference]: Finished difference Result 1153 states and 1251 transitions. [2024-11-13 14:59:45,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-13 14:59:45,931 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 54 states have internal predecessors, (157), 0 states have call successors, (0), 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 14:59:45,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:59:45,933 INFO L225 Difference]: With dead ends: 1153 [2024-11-13 14:59:45,933 INFO L226 Difference]: Without dead ends: 1067 [2024-11-13 14:59:45,934 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=710, Invalid=4402, Unknown=0, NotChecked=0, Total=5112 [2024-11-13 14:59:45,934 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 218 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 1841 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 1896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:59:45,934 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 861 Invalid, 1896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1841 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-13 14:59:45,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2024-11-13 14:59:45,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 729. [2024-11-13 14:59:45,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 725 states have (on average 1.1227586206896552) internal successors, (814), 728 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:59:45,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 814 transitions. [2024-11-13 14:59:45,941 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 814 transitions. Word has length 53 [2024-11-13 14:59:45,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:59:45,941 INFO L471 AbstractCegarLoop]: Abstraction has 729 states and 814 transitions. [2024-11-13 14:59:45,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 54 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:59:45,941 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 814 transitions. [2024-11-13 14:59:45,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-13 14:59:45,942 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:59:45,942 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:59:45,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-13 14:59:46,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-13 14:59:46,143 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:59:46,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:59:46,143 INFO L85 PathProgramCache]: Analyzing trace with hash 613202482, now seen corresponding path program 6 times [2024-11-13 14:59:46,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:59:46,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074502441] [2024-11-13 14:59:46,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:59:46,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:59:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:46,808 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 51 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:59:46,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:59:46,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074502441] [2024-11-13 14:59:46,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074502441] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:59:46,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302274637] [2024-11-13 14:59:46,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 14:59:46,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:59:46,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:59:46,811 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:59:46,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-13 14:59:47,065 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-13 14:59:47,065 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:59:47,068 INFO L255 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-13 14:59:47,071 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:59:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 70 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:59:47,608 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:59:48,051 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 8 treesize of output 6 [2024-11-13 14:59:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 70 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:59:48,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302274637] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:59:48,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:59:48,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 51 [2024-11-13 14:59:48,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803573071] [2024-11-13 14:59:48,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:59:48,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-13 14:59:48,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:59:48,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-13 14:59:48,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=2258, Unknown=0, NotChecked=0, Total=2652 [2024-11-13 14:59:48,254 INFO L87 Difference]: Start difference. First operand 729 states and 814 transitions. Second operand has 52 states, 51 states have (on average 2.411764705882353) internal successors, (123), 52 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 14:59:49,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:59:49,084 INFO L93 Difference]: Finished difference Result 1002 states and 1101 transitions. [2024-11-13 14:59:49,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-13 14:59:49,084 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.411764705882353) internal successors, (123), 52 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 54 [2024-11-13 14:59:49,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:59:49,086 INFO L225 Difference]: With dead ends: 1002 [2024-11-13 14:59:49,086 INFO L226 Difference]: Without dead ends: 984 [2024-11-13 14:59:49,086 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 67 SyntacticMatches, 9 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=413, Invalid=2343, Unknown=0, NotChecked=0, Total=2756 [2024-11-13 14:59:49,086 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 291 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 1509 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 14:59:49,087 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 1089 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1509 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 14:59:49,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2024-11-13 14:59:49,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 724. [2024-11-13 14:59:49,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 720 states have (on average 1.125) internal successors, (810), 723 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:59:49,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 810 transitions. [2024-11-13 14:59:49,096 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 810 transitions. Word has length 54 [2024-11-13 14:59:49,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:59:49,096 INFO L471 AbstractCegarLoop]: Abstraction has 724 states and 810 transitions. [2024-11-13 14:59:49,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.411764705882353) internal successors, (123), 52 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 14:59:49,096 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 810 transitions. [2024-11-13 14:59:49,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-13 14:59:49,097 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:59:49,097 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:59:49,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-13 14:59:49,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:59:49,298 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:59:49,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:59:49,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1645085191, now seen corresponding path program 5 times [2024-11-13 14:59:49,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:59:49,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006837554] [2024-11-13 14:59:49,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:59:49,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:59:49,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 14:59:49,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:59:49,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006837554] [2024-11-13 14:59:49,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006837554] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:59:49,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794418998] [2024-11-13 14:59:49,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 14:59:49,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:59:49,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:59:49,629 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:59:49,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-13 14:59:49,858 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-13 14:59:49,858 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:59:49,860 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-13 14:59:49,862 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:59:49,866 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 14:59:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 14:59:50,087 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:59:50,538 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 14:59:50,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794418998] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:59:50,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:59:50,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2024-11-13 14:59:50,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929307649] [2024-11-13 14:59:50,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:59:50,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-13 14:59:50,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:59:50,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-13 14:59:50,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2024-11-13 14:59:50,540 INFO L87 Difference]: Start difference. First operand 724 states and 810 transitions. Second operand has 32 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 32 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:59:51,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:59:51,043 INFO L93 Difference]: Finished difference Result 816 states and 901 transitions. [2024-11-13 14:59:51,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 14:59:51,044 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 32 states have internal predecessors, (116), 0 states have call successors, (0), 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 54 [2024-11-13 14:59:51,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:59:51,045 INFO L225 Difference]: With dead ends: 816 [2024-11-13 14:59:51,045 INFO L226 Difference]: Without dead ends: 816 [2024-11-13 14:59:51,046 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2024-11-13 14:59:51,046 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 36 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 14:59:51,046 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 557 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 14:59:51,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2024-11-13 14:59:51,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 767. [2024-11-13 14:59:51,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 763 states have (on average 1.1192660550458715) internal successors, (854), 766 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:59:51,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 854 transitions. [2024-11-13 14:59:51,055 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 854 transitions. Word has length 54 [2024-11-13 14:59:51,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:59:51,055 INFO L471 AbstractCegarLoop]: Abstraction has 767 states and 854 transitions. [2024-11-13 14:59:51,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 32 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:59:51,055 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 854 transitions. [2024-11-13 14:59:51,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-13 14:59:51,057 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:59:51,057 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:59:51,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-13 14:59:51,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2024-11-13 14:59:51,257 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:59:51,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:59:51,258 INFO L85 PathProgramCache]: Analyzing trace with hash -661273907, now seen corresponding path program 10 times [2024-11-13 14:59:51,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:59:51,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151791490] [2024-11-13 14:59:51,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:59:51,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:59:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:52,384 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 51 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:59:52,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:59:52,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151791490] [2024-11-13 14:59:52,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151791490] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:59:52,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422698876] [2024-11-13 14:59:52,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:59:52,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:59:52,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:59:52,386 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:59:52,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-13 14:59:52,631 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:59:52,631 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:59:52,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-11-13 14:59:52,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:59:53,033 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 14:59:53,559 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 9 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:59:53,559 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:59:53,604 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 18 treesize of output 16 [2024-11-13 14:59:53,607 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 14:59:53,780 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 9 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:59:53,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422698876] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:59:53,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:59:53,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 24] total 47 [2024-11-13 14:59:53,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098734402] [2024-11-13 14:59:53,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:59:53,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-13 14:59:53,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:59:53,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-13 14:59:53,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2041, Unknown=0, NotChecked=0, Total=2162 [2024-11-13 14:59:53,782 INFO L87 Difference]: Start difference. First operand 767 states and 854 transitions. Second operand has 47 states, 47 states have (on average 2.382978723404255) internal successors, (112), 47 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:59:57,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:59:57,940 INFO L93 Difference]: Finished difference Result 1239 states and 1348 transitions. [2024-11-13 14:59:57,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-11-13 14:59:57,941 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.382978723404255) internal successors, (112), 47 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2024-11-13 14:59:57,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:59:57,944 INFO L225 Difference]: With dead ends: 1239 [2024-11-13 14:59:57,944 INFO L226 Difference]: Without dead ends: 1150 [2024-11-13 14:59:57,945 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=408, Invalid=7074, Unknown=0, NotChecked=0, Total=7482 [2024-11-13 14:59:57,945 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 164 mSDsluCounter, 2941 mSDsCounter, 0 mSdLazyCounter, 3819 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 3031 SdHoareTripleChecker+Invalid, 3854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:59:57,945 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 3031 Invalid, 3854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 3819 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-13 14:59:57,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2024-11-13 14:59:57,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 850. [2024-11-13 14:59:57,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 846 states have (on average 1.1182033096926713) internal successors, (946), 849 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:59:57,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 946 transitions. [2024-11-13 14:59:57,955 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 946 transitions. Word has length 56 [2024-11-13 14:59:57,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:59:57,955 INFO L471 AbstractCegarLoop]: Abstraction has 850 states and 946 transitions. [2024-11-13 14:59:57,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.382978723404255) internal successors, (112), 47 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:59:57,956 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 946 transitions. [2024-11-13 14:59:57,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-13 14:59:57,957 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:59:57,957 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:59:57,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-13 14:59:58,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:59:58,158 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 14:59:58,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:59:58,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1372918945, now seen corresponding path program 5 times [2024-11-13 14:59:58,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:59:58,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359026519] [2024-11-13 14:59:58,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:59:58,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:59:58,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:59,360 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:59:59,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:59:59,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359026519] [2024-11-13 14:59:59,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359026519] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:59:59,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430837280] [2024-11-13 14:59:59,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 14:59:59,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:59:59,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:59:59,362 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:59:59,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-13 14:59:59,608 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-13 14:59:59,608 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:59:59,611 INFO L255 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-13 14:59:59,615 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:59:59,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:59:59,699 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 14:59:59,703 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 15:00:01,343 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:00:01,343 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:00:02,988 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:00:03,138 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:00:03,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430837280] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:00:03,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:00:03,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 57 [2024-11-13 15:00:03,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622060673] [2024-11-13 15:00:03,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:00:03,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-13 15:00:03,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:00:03,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-13 15:00:03,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=2909, Unknown=0, NotChecked=0, Total=3306 [2024-11-13 15:00:03,140 INFO L87 Difference]: Start difference. First operand 850 states and 946 transitions. Second operand has 58 states, 57 states have (on average 2.807017543859649) internal successors, (160), 58 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:00:05,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:00:05,619 INFO L93 Difference]: Finished difference Result 1143 states and 1242 transitions. [2024-11-13 15:00:05,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-13 15:00:05,620 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 2.807017543859649) internal successors, (160), 58 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-11-13 15:00:05,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:00:05,623 INFO L225 Difference]: With dead ends: 1143 [2024-11-13 15:00:05,623 INFO L226 Difference]: Without dead ends: 1111 [2024-11-13 15:00:05,624 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1768 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=803, Invalid=5517, Unknown=0, NotChecked=0, Total=6320 [2024-11-13 15:00:05,624 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 226 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 1845 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 1906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:00:05,624 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 836 Invalid, 1906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1845 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-13 15:00:05,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2024-11-13 15:00:05,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 804. [2024-11-13 15:00:05,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 800 states have (on average 1.12375) internal successors, (899), 803 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:00:05,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 899 transitions. [2024-11-13 15:00:05,633 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 899 transitions. Word has length 57 [2024-11-13 15:00:05,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:00:05,633 INFO L471 AbstractCegarLoop]: Abstraction has 804 states and 899 transitions. [2024-11-13 15:00:05,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 2.807017543859649) internal successors, (160), 58 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:00:05,634 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 899 transitions. [2024-11-13 15:00:05,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-13 15:00:05,635 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:00:05,635 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:00:05,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-13 15:00:05,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:00:05,836 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:00:05,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:00:05,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1738842876, now seen corresponding path program 6 times [2024-11-13 15:00:05,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:00:05,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147567112] [2024-11-13 15:00:05,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:00:05,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:00:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:00:06,592 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:00:06,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:00:06,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147567112] [2024-11-13 15:00:06,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147567112] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:00:06,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262639125] [2024-11-13 15:00:06,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 15:00:06,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:00:06,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:00:06,594 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:00:06,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-13 15:00:06,928 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-13 15:00:06,928 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:00:06,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-13 15:00:06,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:00:07,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:00:07,016 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 15:00:07,020 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 15:00:08,279 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:00:08,279 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:00:09,759 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:00:09,894 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:00:09,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262639125] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:00:09,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:00:09,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 21] total 57 [2024-11-13 15:00:09,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177618715] [2024-11-13 15:00:09,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:00:09,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-13 15:00:09,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:00:09,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-13 15:00:09,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=2817, Unknown=0, NotChecked=0, Total=3306 [2024-11-13 15:00:09,896 INFO L87 Difference]: Start difference. First operand 804 states and 899 transitions. Second operand has 58 states, 57 states have (on average 2.6491228070175437) internal successors, (151), 58 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:00:12,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:00:12,226 INFO L93 Difference]: Finished difference Result 1133 states and 1238 transitions. [2024-11-13 15:00:12,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-13 15:00:12,227 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 2.6491228070175437) internal successors, (151), 58 states have internal predecessors, (151), 0 states have call successors, (0), 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 57 [2024-11-13 15:00:12,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:00:12,229 INFO L225 Difference]: With dead ends: 1133 [2024-11-13 15:00:12,229 INFO L226 Difference]: Without dead ends: 1129 [2024-11-13 15:00:12,229 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2612 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1305, Invalid=6527, Unknown=0, NotChecked=0, Total=7832 [2024-11-13 15:00:12,229 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 171 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-13 15:00:12,230 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 295 Invalid, 1335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-13 15:00:12,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2024-11-13 15:00:12,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 854. [2024-11-13 15:00:12,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 850 states have (on average 1.12) internal successors, (952), 853 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:00:12,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 952 transitions. [2024-11-13 15:00:12,240 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 952 transitions. Word has length 57 [2024-11-13 15:00:12,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:00:12,240 INFO L471 AbstractCegarLoop]: Abstraction has 854 states and 952 transitions. [2024-11-13 15:00:12,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 2.6491228070175437) internal successors, (151), 58 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:00:12,240 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 952 transitions. [2024-11-13 15:00:12,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-13 15:00:12,242 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:00:12,242 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 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 15:00:12,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-13 15:00:12,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:00:12,442 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:00:12,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:00:12,443 INFO L85 PathProgramCache]: Analyzing trace with hash 185612777, now seen corresponding path program 3 times [2024-11-13 15:00:12,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:00:12,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166410079] [2024-11-13 15:00:12,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:00:12,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:00:12,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:00:13,300 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 22 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:00:13,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:00:13,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166410079] [2024-11-13 15:00:13,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166410079] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:00:13,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793722292] [2024-11-13 15:00:13,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 15:00:13,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:00:13,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:00:13,303 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:00:13,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-13 15:00:13,569 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-13 15:00:13,569 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:00:13,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-11-13 15:00:13,575 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:00:13,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:00:13,583 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 15:00:13,589 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 15:00:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:00:14,766 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:00:16,355 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:00:16,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793722292] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:00:16,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:00:16,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 21] total 58 [2024-11-13 15:00:16,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340555983] [2024-11-13 15:00:16,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:00:16,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-13 15:00:16,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:00:16,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-13 15:00:16,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=3109, Unknown=0, NotChecked=0, Total=3422 [2024-11-13 15:00:16,357 INFO L87 Difference]: Start difference. First operand 854 states and 952 transitions. Second operand has 59 states, 58 states have (on average 2.896551724137931) internal successors, (168), 59 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:00:21,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:00:21,074 INFO L93 Difference]: Finished difference Result 1301 states and 1412 transitions. [2024-11-13 15:00:21,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-13 15:00:21,075 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 2.896551724137931) internal successors, (168), 59 states have internal predecessors, (168), 0 states have call successors, (0), 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 15:00:21,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:00:21,078 INFO L225 Difference]: With dead ends: 1301 [2024-11-13 15:00:21,078 INFO L226 Difference]: Without dead ends: 1267 [2024-11-13 15:00:21,079 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1691 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=882, Invalid=8430, Unknown=0, NotChecked=0, Total=9312 [2024-11-13 15:00:21,079 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 389 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 3503 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 3586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 3503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:00:21,079 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 1565 Invalid, 3586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 3503 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-13 15:00:21,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2024-11-13 15:00:21,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 854. [2024-11-13 15:00:21,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 850 states have (on average 1.1176470588235294) internal successors, (950), 853 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:00:21,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 950 transitions. [2024-11-13 15:00:21,089 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 950 transitions. Word has length 58 [2024-11-13 15:00:21,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:00:21,089 INFO L471 AbstractCegarLoop]: Abstraction has 854 states and 950 transitions. [2024-11-13 15:00:21,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 2.896551724137931) internal successors, (168), 59 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:00:21,089 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 950 transitions. [2024-11-13 15:00:21,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-13 15:00:21,090 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:00:21,090 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:00:21,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-13 15:00:21,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:00:21,291 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:00:21,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:00:21,291 INFO L85 PathProgramCache]: Analyzing trace with hash -725813003, now seen corresponding path program 7 times [2024-11-13 15:00:21,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:00:21,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109938762] [2024-11-13 15:00:21,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:00:21,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:00:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:00:21,965 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 70 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:00:21,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:00:21,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109938762] [2024-11-13 15:00:21,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109938762] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:00:21,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620060721] [2024-11-13 15:00:21,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 15:00:21,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:00:21,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:00:21,968 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:00:21,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-13 15:00:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:00:22,196 INFO L255 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-13 15:00:22,199 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:00:22,574 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 92 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:00:22,574 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:00:23,027 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 15:00:23,295 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 92 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:00:23,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620060721] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:00:23,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:00:23,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 47 [2024-11-13 15:00:23,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633258461] [2024-11-13 15:00:23,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:00:23,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-13 15:00:23,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:00:23,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-13 15:00:23,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1977, Unknown=0, NotChecked=0, Total=2256 [2024-11-13 15:00:23,297 INFO L87 Difference]: Start difference. First operand 854 states and 950 transitions. Second operand has 48 states, 47 states have (on average 2.5106382978723403) internal successors, (118), 48 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:00:24,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:00:24,615 INFO L93 Difference]: Finished difference Result 1195 states and 1307 transitions. [2024-11-13 15:00:24,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-13 15:00:24,616 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.5106382978723403) internal successors, (118), 48 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2024-11-13 15:00:24,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:00:24,617 INFO L225 Difference]: With dead ends: 1195 [2024-11-13 15:00:24,618 INFO L226 Difference]: Without dead ends: 1177 [2024-11-13 15:00:24,618 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 82 SyntacticMatches, 10 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=300, Invalid=2052, Unknown=0, NotChecked=0, Total=2352 [2024-11-13 15:00:24,618 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 237 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 2503 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1570 SdHoareTripleChecker+Invalid, 2543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:00:24,618 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 1570 Invalid, 2543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2503 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-13 15:00:24,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2024-11-13 15:00:24,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 852. [2024-11-13 15:00:24,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 848 states have (on average 1.1191037735849056) internal successors, (949), 851 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:00:24,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 949 transitions. [2024-11-13 15:00:24,629 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 949 transitions. Word has length 59 [2024-11-13 15:00:24,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:00:24,630 INFO L471 AbstractCegarLoop]: Abstraction has 852 states and 949 transitions. [2024-11-13 15:00:24,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.5106382978723403) internal successors, (118), 48 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:00:24,630 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 949 transitions. [2024-11-13 15:00:24,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-13 15:00:24,631 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:00:24,631 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:00:24,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-11-13 15:00:24,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:00:24,832 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:00:24,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:00:24,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1881229543, now seen corresponding path program 6 times [2024-11-13 15:00:24,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:00:24,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603134243] [2024-11-13 15:00:24,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:00:24,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:00:24,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:00:25,760 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:00:25,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:00:25,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603134243] [2024-11-13 15:00:25,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603134243] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:00:25,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799664930] [2024-11-13 15:00:25,760 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 15:00:25,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:00:25,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:00:25,762 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:00:25,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-13 15:00:26,014 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-13 15:00:26,014 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:00:26,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-13 15:00:26,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:00:26,190 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 15:00:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:00:26,294 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:00:26,341 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 15:00:26,342 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 15:00:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:00:26,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799664930] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:00:26,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:00:26,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 16] total 32 [2024-11-13 15:00:26,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867579216] [2024-11-13 15:00:26,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:00:26,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-13 15:00:26,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:00:26,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-13 15:00:26,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2024-11-13 15:00:26,431 INFO L87 Difference]: Start difference. First operand 852 states and 949 transitions. Second operand has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 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 15:00:27,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:00:27,432 INFO L93 Difference]: Finished difference Result 1335 states and 1474 transitions. [2024-11-13 15:00:27,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-13 15:00:27,432 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2024-11-13 15:00:27,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:00:27,435 INFO L225 Difference]: With dead ends: 1335 [2024-11-13 15:00:27,436 INFO L226 Difference]: Without dead ends: 1114 [2024-11-13 15:00:27,436 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=163, Invalid=1729, Unknown=0, NotChecked=0, Total=1892 [2024-11-13 15:00:27,436 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 33 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 15:00:27,436 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 809 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 15:00:27,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2024-11-13 15:00:27,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 979. [2024-11-13 15:00:27,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 975 states have (on average 1.1158974358974358) internal successors, (1088), 978 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 15:00:27,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1088 transitions. [2024-11-13 15:00:27,448 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1088 transitions. Word has length 60 [2024-11-13 15:00:27,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:00:27,448 INFO L471 AbstractCegarLoop]: Abstraction has 979 states and 1088 transitions. [2024-11-13 15:00:27,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 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 15:00:27,448 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1088 transitions. [2024-11-13 15:00:27,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-13 15:00:27,449 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:00:27,449 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:00:27,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-13 15:00:27,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:00:27,653 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:00:27,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:00:27,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1312456588, now seen corresponding path program 11 times [2024-11-13 15:00:27,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:00:27,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180485376] [2024-11-13 15:00:27,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:00:27,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:00:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:00:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 70 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:00:28,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:00:28,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180485376] [2024-11-13 15:00:28,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180485376] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:00:28,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727910580] [2024-11-13 15:00:28,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 15:00:28,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:00:28,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:00:28,788 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:00:28,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-13 15:00:29,069 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-13 15:00:29,070 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:00:29,072 INFO L255 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 110 conjuncts are in the unsatisfiable core [2024-11-13 15:00:29,076 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:00:29,597 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 15:00:30,251 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 10 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:00:30,251 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:00:30,295 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 18 treesize of output 16 [2024-11-13 15:00:30,297 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 15:00:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 10 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:00:30,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727910580] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:00:30,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:00:30,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 26] total 51 [2024-11-13 15:00:30,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274767395] [2024-11-13 15:00:30,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:00:30,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-13 15:00:30,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:00:30,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-13 15:00:30,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2414, Unknown=0, NotChecked=0, Total=2550 [2024-11-13 15:00:30,483 INFO L87 Difference]: Start difference. First operand 979 states and 1088 transitions. Second operand has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 51 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:00:35,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:00:35,288 INFO L93 Difference]: Finished difference Result 1551 states and 1688 transitions. [2024-11-13 15:00:35,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-11-13 15:00:35,289 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 51 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2024-11-13 15:00:35,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:00:35,291 INFO L225 Difference]: With dead ends: 1551 [2024-11-13 15:00:35,291 INFO L226 Difference]: Without dead ends: 1456 [2024-11-13 15:00:35,292 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=461, Invalid=8469, Unknown=0, NotChecked=0, Total=8930 [2024-11-13 15:00:35,292 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 175 mSDsluCounter, 3260 mSDsCounter, 0 mSdLazyCounter, 4255 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 3356 SdHoareTripleChecker+Invalid, 4294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 4255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:00:35,292 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 3356 Invalid, 4294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 4255 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-13 15:00:35,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2024-11-13 15:00:35,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1078. [2024-11-13 15:00:35,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1074 states have (on average 1.1163873370577282) internal successors, (1199), 1077 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:00:35,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 1199 transitions. [2024-11-13 15:00:35,305 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 1199 transitions. Word has length 61 [2024-11-13 15:00:35,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:00:35,306 INFO L471 AbstractCegarLoop]: Abstraction has 1078 states and 1199 transitions. [2024-11-13 15:00:35,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 51 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:00:35,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 1199 transitions. [2024-11-13 15:00:35,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-13 15:00:35,307 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:00:35,307 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:00:35,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-13 15:00:35,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-11-13 15:00:35,508 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:00:35,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:00:35,509 INFO L85 PathProgramCache]: Analyzing trace with hash 2098285846, now seen corresponding path program 4 times [2024-11-13 15:00:35,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:00:35,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001109827] [2024-11-13 15:00:35,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:00:35,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:00:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:00:36,395 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:00:36,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:00:36,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001109827] [2024-11-13 15:00:36,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001109827] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:00:36,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357636948] [2024-11-13 15:00:36,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 15:00:36,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:00:36,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:00:36,397 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:00:36,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-13 15:00:36,668 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 15:00:36,668 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:00:36,670 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 88 conjuncts are in the unsatisfiable core [2024-11-13 15:00:36,673 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:00:36,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:00:36,686 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 15:00:36,692 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 15:00:38,256 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:00:38,257 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:00:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:00:39,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357636948] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:00:39,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:00:39,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 56 [2024-11-13 15:00:39,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096747995] [2024-11-13 15:00:39,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:00:39,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-13 15:00:39,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:00:39,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-13 15:00:39,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=2880, Unknown=0, NotChecked=0, Total=3192 [2024-11-13 15:00:39,927 INFO L87 Difference]: Start difference. First operand 1078 states and 1199 transitions. Second operand has 57 states, 56 states have (on average 2.982142857142857) internal successors, (167), 57 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:00:43,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:00:43,035 INFO L93 Difference]: Finished difference Result 1259 states and 1378 transitions. [2024-11-13 15:00:43,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-13 15:00:43,035 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 2.982142857142857) internal successors, (167), 57 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2024-11-13 15:00:43,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:00:43,038 INFO L225 Difference]: With dead ends: 1259 [2024-11-13 15:00:43,038 INFO L226 Difference]: Without dead ends: 1180 [2024-11-13 15:00:43,038 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1931 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=810, Invalid=7200, Unknown=0, NotChecked=0, Total=8010 [2024-11-13 15:00:43,038 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 164 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 2061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:00:43,038 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 511 Invalid, 2061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2022 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-13 15:00:43,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2024-11-13 15:00:43,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1023. [2024-11-13 15:00:43,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1019 states have (on average 1.1187438665358194) internal successors, (1140), 1022 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:00:43,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1140 transitions. [2024-11-13 15:00:43,045 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1140 transitions. Word has length 61 [2024-11-13 15:00:43,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:00:43,045 INFO L471 AbstractCegarLoop]: Abstraction has 1023 states and 1140 transitions. [2024-11-13 15:00:43,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 2.982142857142857) internal successors, (167), 57 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:00:43,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1140 transitions. [2024-11-13 15:00:43,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-13 15:00:43,045 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:00:43,046 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 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 15:00:43,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-11-13 15:00:43,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-11-13 15:00:43,246 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:00:43,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:00:43,246 INFO L85 PathProgramCache]: Analyzing trace with hash 525565258, now seen corresponding path program 7 times [2024-11-13 15:00:43,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:00:43,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892076668] [2024-11-13 15:00:43,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:00:43,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:00:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:00:44,180 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 35 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:00:44,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:00:44,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892076668] [2024-11-13 15:00:44,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892076668] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:00:44,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446296936] [2024-11-13 15:00:44,181 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 15:00:44,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:00:44,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:00:44,182 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:00:44,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-13 15:00:44,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:00:44,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-11-13 15:00:44,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:00:44,550 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 15:00:44,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:00:44,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 15:00:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 51 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:00:46,037 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:00:47,534 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:00:47,669 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 70 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:00:47,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446296936] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:00:47,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:00:47,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 23] total 65 [2024-11-13 15:00:47,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812522254] [2024-11-13 15:00:47,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:00:47,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-13 15:00:47,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:00:47,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-13 15:00:47,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=3827, Unknown=0, NotChecked=0, Total=4290 [2024-11-13 15:00:47,671 INFO L87 Difference]: Start difference. First operand 1023 states and 1140 transitions. Second operand has 66 states, 65 states have (on average 2.876923076923077) internal successors, (187), 66 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:00:51,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:00:51,365 INFO L93 Difference]: Finished difference Result 1801 states and 1948 transitions. [2024-11-13 15:00:51,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-13 15:00:51,366 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 2.876923076923077) internal successors, (187), 66 states have internal predecessors, (187), 0 states have call successors, (0), 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 15:00:51,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:00:51,369 INFO L225 Difference]: With dead ends: 1801 [2024-11-13 15:00:51,369 INFO L226 Difference]: Without dead ends: 1695 [2024-11-13 15:00:51,369 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2406 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1105, Invalid=7825, Unknown=0, NotChecked=0, Total=8930 [2024-11-13 15:00:51,369 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 331 mSDsluCounter, 1286 mSDsCounter, 0 mSdLazyCounter, 2949 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 3017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-13 15:00:51,370 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 1342 Invalid, 3017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2949 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-13 15:00:51,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1695 states. [2024-11-13 15:00:51,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1695 to 1119. [2024-11-13 15:00:51,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1115 states have (on average 1.116591928251121) internal successors, (1245), 1118 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:00:51,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1245 transitions. [2024-11-13 15:00:51,381 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1245 transitions. Word has length 63 [2024-11-13 15:00:51,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:00:51,381 INFO L471 AbstractCegarLoop]: Abstraction has 1119 states and 1245 transitions. [2024-11-13 15:00:51,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 2.876923076923077) internal successors, (187), 66 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:00:51,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1245 transitions. [2024-11-13 15:00:51,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-13 15:00:51,382 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:00:51,382 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:00:51,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-13 15:00:51,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-11-13 15:00:51,583 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:00:51,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:00:51,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1013375588, now seen corresponding path program 8 times [2024-11-13 15:00:51,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:00:51,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583835669] [2024-11-13 15:00:51,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:00:51,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:00:51,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:00:52,317 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 92 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:00:52,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:00:52,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583835669] [2024-11-13 15:00:52,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583835669] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:00:52,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718350729] [2024-11-13 15:00:52,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:00:52,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:00:52,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:00:52,319 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:00:52,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-13 15:00:52,586 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:00:52,586 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:00:52,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-11-13 15:00:52,593 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:00:53,129 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 117 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:00:53,129 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:00:53,692 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 23 treesize of output 19 [2024-11-13 15:00:54,235 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 117 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:00:54,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718350729] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:00:54,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:00:54,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 60 [2024-11-13 15:00:54,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439535539] [2024-11-13 15:00:54,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:00:54,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-13 15:00:54,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:00:54,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-13 15:00:54,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=3166, Unknown=0, NotChecked=0, Total=3660 [2024-11-13 15:00:54,237 INFO L87 Difference]: Start difference. First operand 1119 states and 1245 transitions. Second operand has 61 states, 60 states have (on average 2.716666666666667) internal successors, (163), 61 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 15:00:55,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:00:55,796 INFO L93 Difference]: Finished difference Result 1535 states and 1681 transitions. [2024-11-13 15:00:55,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-13 15:00:55,796 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 2.716666666666667) internal successors, (163), 61 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 64 [2024-11-13 15:00:55,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:00:55,799 INFO L225 Difference]: With dead ends: 1535 [2024-11-13 15:00:55,800 INFO L226 Difference]: Without dead ends: 1511 [2024-11-13 15:00:55,800 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=528, Invalid=3254, Unknown=0, NotChecked=0, Total=3782 [2024-11-13 15:00:55,800 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 326 mSDsluCounter, 1689 mSDsCounter, 0 mSdLazyCounter, 2765 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1769 SdHoareTripleChecker+Invalid, 2816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:00:55,800 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 1769 Invalid, 2816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2765 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-13 15:00:55,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2024-11-13 15:00:55,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 1116. [2024-11-13 15:00:55,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1112 states have (on average 1.1178057553956835) internal successors, (1243), 1115 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:00:55,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 1243 transitions. [2024-11-13 15:00:55,814 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 1243 transitions. Word has length 64 [2024-11-13 15:00:55,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:00:55,814 INFO L471 AbstractCegarLoop]: Abstraction has 1116 states and 1243 transitions. [2024-11-13 15:00:55,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 2.716666666666667) internal successors, (163), 61 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 15:00:55,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 1243 transitions. [2024-11-13 15:00:55,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-13 15:00:55,816 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:00:55,816 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:00:55,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-13 15:00:56,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:00:56,016 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:00:56,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:00:56,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1782907905, now seen corresponding path program 12 times [2024-11-13 15:00:56,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:00:56,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500993329] [2024-11-13 15:00:56,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:00:56,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:00:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:00:57,297 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 92 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:00:57,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:00:57,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500993329] [2024-11-13 15:00:57,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500993329] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:00:57,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683427228] [2024-11-13 15:00:57,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 15:00:57,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:00:57,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:00:57,299 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:00:57,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-13 15:00:57,661 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-11-13 15:00:57,662 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:00:57,665 INFO L255 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-11-13 15:00:57,669 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:00:58,167 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 15:00:58,842 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 11 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:00:58,842 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:00:58,887 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 18 treesize of output 16 [2024-11-13 15:00:58,889 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 15:00:59,071 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 11 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:00:59,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683427228] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:00:59,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:00:59,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 28] total 55 [2024-11-13 15:00:59,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003255406] [2024-11-13 15:00:59,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:00:59,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-13 15:00:59,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:00:59,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-13 15:00:59,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2818, Unknown=0, NotChecked=0, Total=2970 [2024-11-13 15:00:59,073 INFO L87 Difference]: Start difference. First operand 1116 states and 1243 transitions. Second operand has 55 states, 55 states have (on average 2.4) internal successors, (132), 55 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:01:04,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:01:04,840 INFO L93 Difference]: Finished difference Result 1741 states and 1898 transitions. [2024-11-13 15:01:04,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2024-11-13 15:01:04,840 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.4) internal successors, (132), 55 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2024-11-13 15:01:04,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:01:04,844 INFO L225 Difference]: With dead ends: 1741 [2024-11-13 15:01:04,844 INFO L226 Difference]: Without dead ends: 1640 [2024-11-13 15:01:04,845 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1856 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=517, Invalid=9989, Unknown=0, NotChecked=0, Total=10506 [2024-11-13 15:01:04,846 INFO L432 NwaCegarLoop]: 102 mSDtfsCounter, 190 mSDsluCounter, 3965 mSDsCounter, 0 mSdLazyCounter, 5248 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 4067 SdHoareTripleChecker+Invalid, 5291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 5248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:01:04,846 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 4067 Invalid, 5291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 5248 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-13 15:01:04,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2024-11-13 15:01:04,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1218. [2024-11-13 15:01:04,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1214 states have (on average 1.1177924217462933) internal successors, (1357), 1217 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:01:04,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 1357 transitions. [2024-11-13 15:01:04,859 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 1357 transitions. Word has length 66 [2024-11-13 15:01:04,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:01:04,859 INFO L471 AbstractCegarLoop]: Abstraction has 1218 states and 1357 transitions. [2024-11-13 15:01:04,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.4) internal successors, (132), 55 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:01:04,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 1357 transitions. [2024-11-13 15:01:04,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-13 15:01:04,860 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:01:04,860 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:01:04,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-13 15:01:05,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:01:05,061 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:01:05,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:01:05,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1177802531, now seen corresponding path program 7 times [2024-11-13 15:01:05,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:01:05,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729209888] [2024-11-13 15:01:05,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:01:05,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:01:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:01:05,488 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 5 proven. 65 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 15:01:05,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:01:05,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729209888] [2024-11-13 15:01:05,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729209888] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:01:05,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694059131] [2024-11-13 15:01:05,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 15:01:05,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:01:05,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:01:05,490 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:01:05,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-13 15:01:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:01:05,751 INFO L255 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-13 15:01:05,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:01:05,993 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 58 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 15:01:05,993 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:01:06,301 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 15:01:06,401 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 58 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 15:01:06,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694059131] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:01:06,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:01:06,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 31 [2024-11-13 15:01:06,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801574456] [2024-11-13 15:01:06,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:01:06,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-13 15:01:06,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:01:06,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-13 15:01:06,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2024-11-13 15:01:06,403 INFO L87 Difference]: Start difference. First operand 1218 states and 1357 transitions. Second operand has 32 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 32 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:01:06,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:01:06,999 INFO L93 Difference]: Finished difference Result 1329 states and 1466 transitions. [2024-11-13 15:01:07,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-13 15:01:07,000 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 32 states have internal predecessors, (116), 0 states have call successors, (0), 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 15:01:07,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:01:07,003 INFO L225 Difference]: With dead ends: 1329 [2024-11-13 15:01:07,003 INFO L226 Difference]: Without dead ends: 1329 [2024-11-13 15:01:07,004 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 110 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2024-11-13 15:01:07,004 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 29 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:01:07,004 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 647 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 15:01:07,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2024-11-13 15:01:07,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1267. [2024-11-13 15:01:07,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1263 states have (on average 1.1140142517814726) internal successors, (1407), 1266 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:01:07,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 1407 transitions. [2024-11-13 15:01:07,015 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 1407 transitions. Word has length 66 [2024-11-13 15:01:07,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:01:07,015 INFO L471 AbstractCegarLoop]: Abstraction has 1267 states and 1407 transitions. [2024-11-13 15:01:07,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 32 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:01:07,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 1407 transitions. [2024-11-13 15:01:07,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-13 15:01:07,016 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:01:07,017 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:01:07,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-13 15:01:07,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:01:07,217 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:01:07,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:01:07,217 INFO L85 PathProgramCache]: Analyzing trace with hash -813074963, now seen corresponding path program 8 times [2024-11-13 15:01:07,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:01:07,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606816639] [2024-11-13 15:01:07,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:01:07,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:01:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:01:08,310 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 27 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:01:08,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:01:08,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606816639] [2024-11-13 15:01:08,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606816639] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:01:08,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729921376] [2024-11-13 15:01:08,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:01:08,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:01:08,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:01:08,313 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:01:08,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-13 15:01:08,590 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:01:08,590 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:01:08,593 INFO L255 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 114 conjuncts are in the unsatisfiable core [2024-11-13 15:01:08,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:01:08,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:01:08,665 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 15:01:08,672 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 15:01:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:01:10,322 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:01:12,552 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:01:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:01:12,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729921376] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:01:12,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:01:12,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 26] total 73 [2024-11-13 15:01:12,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041219248] [2024-11-13 15:01:12,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:01:12,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-11-13 15:01:12,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:01:12,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-11-13 15:01:12,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=619, Invalid=4783, Unknown=0, NotChecked=0, Total=5402 [2024-11-13 15:01:12,702 INFO L87 Difference]: Start difference. First operand 1267 states and 1407 transitions. Second operand has 74 states, 73 states have (on average 2.6027397260273974) internal successors, (190), 74 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:01:17,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:01:17,861 INFO L93 Difference]: Finished difference Result 1757 states and 1900 transitions. [2024-11-13 15:01:17,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-11-13 15:01:17,862 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 2.6027397260273974) internal successors, (190), 74 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2024-11-13 15:01:17,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:01:17,865 INFO L225 Difference]: With dead ends: 1757 [2024-11-13 15:01:17,865 INFO L226 Difference]: Without dead ends: 1677 [2024-11-13 15:01:17,866 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4927 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1789, Invalid=13463, Unknown=0, NotChecked=0, Total=15252 [2024-11-13 15:01:17,866 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 398 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 3201 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 1410 SdHoareTripleChecker+Invalid, 3353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 3201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:01:17,866 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 1410 Invalid, 3353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 3201 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-13 15:01:17,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2024-11-13 15:01:17,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1167. [2024-11-13 15:01:17,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1163 states have (on average 1.117798796216681) internal successors, (1300), 1166 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:01:17,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1300 transitions. [2024-11-13 15:01:17,877 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1300 transitions. Word has length 67 [2024-11-13 15:01:17,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:01:17,877 INFO L471 AbstractCegarLoop]: Abstraction has 1167 states and 1300 transitions. [2024-11-13 15:01:17,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 2.6027397260273974) internal successors, (190), 74 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:01:17,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1300 transitions. [2024-11-13 15:01:17,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-13 15:01:17,879 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:01:17,879 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 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 15:01:17,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-13 15:01:18,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2024-11-13 15:01:18,079 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:01:18,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:01:18,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1295734135, now seen corresponding path program 5 times [2024-11-13 15:01:18,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:01:18,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760381521] [2024-11-13 15:01:18,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:01:18,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:01:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:01:19,158 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 51 proven. 116 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:01:19,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:01:19,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760381521] [2024-11-13 15:01:19,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760381521] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:01:19,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397540511] [2024-11-13 15:01:19,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 15:01:19,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:01:19,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:01:19,160 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:01:19,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-13 15:01:19,465 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-11-13 15:01:19,466 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:01:19,469 INFO L255 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-11-13 15:01:19,473 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:01:19,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:01:19,508 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 15:01:19,517 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 15:01:21,393 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 70 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:01:21,394 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:01:23,362 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 92 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:01:23,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397540511] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:01:23,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:01:23,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 23] total 69 [2024-11-13 15:01:23,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084529358] [2024-11-13 15:01:23,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:01:23,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-13 15:01:23,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:01:23,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-13 15:01:23,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=4281, Unknown=0, NotChecked=0, Total=4830 [2024-11-13 15:01:23,364 INFO L87 Difference]: Start difference. First operand 1167 states and 1300 transitions. Second operand has 70 states, 69 states have (on average 2.8405797101449277) internal successors, (196), 70 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:01:26,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:01:26,487 INFO L93 Difference]: Finished difference Result 1603 states and 1745 transitions. [2024-11-13 15:01:26,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-13 15:01:26,487 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 2.8405797101449277) internal successors, (196), 70 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2024-11-13 15:01:26,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:01:26,489 INFO L225 Difference]: With dead ends: 1603 [2024-11-13 15:01:26,489 INFO L226 Difference]: Without dead ends: 1567 [2024-11-13 15:01:26,490 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2576 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1057, Invalid=7873, Unknown=0, NotChecked=0, Total=8930 [2024-11-13 15:01:26,490 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 411 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 2707 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 2791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-13 15:01:26,490 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 910 Invalid, 2791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2707 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-13 15:01:26,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1567 states. [2024-11-13 15:01:26,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1567 to 1233. [2024-11-13 15:01:26,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1229 states have (on average 1.1139137510170871) internal successors, (1369), 1232 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:01:26,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 1369 transitions. [2024-11-13 15:01:26,499 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 1369 transitions. Word has length 68 [2024-11-13 15:01:26,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:01:26,500 INFO L471 AbstractCegarLoop]: Abstraction has 1233 states and 1369 transitions. [2024-11-13 15:01:26,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 2.8405797101449277) internal successors, (196), 70 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:01:26,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 1369 transitions. [2024-11-13 15:01:26,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-13 15:01:26,501 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:01:26,501 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:01:26,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-13 15:01:26,701 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2024-11-13 15:01:26,701 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:01:26,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:01:26,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1318232103, now seen corresponding path program 9 times [2024-11-13 15:01:26,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:01:26,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243835175] [2024-11-13 15:01:26,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:01:26,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:01:26,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:01:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 117 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:01:27,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:01:27,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243835175] [2024-11-13 15:01:27,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243835175] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:01:27,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269819212] [2024-11-13 15:01:27,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 15:01:27,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:01:27,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:01:27,465 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:01:27,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-13 15:01:27,839 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-13 15:01:27,839 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:01:27,842 INFO L255 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-11-13 15:01:27,848 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:01:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 145 proven. 152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:01:28,649 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:01:29,345 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 8 treesize of output 6 [2024-11-13 15:01:29,765 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 145 proven. 152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:01:29,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269819212] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:01:29,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:01:29,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 66 [2024-11-13 15:01:29,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056679804] [2024-11-13 15:01:29,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:01:29,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-13 15:01:29,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:01:29,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-13 15:01:29,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=661, Invalid=3761, Unknown=0, NotChecked=0, Total=4422 [2024-11-13 15:01:29,766 INFO L87 Difference]: Start difference. First operand 1233 states and 1369 transitions. Second operand has 67 states, 66 states have (on average 2.409090909090909) internal successors, (159), 67 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:01:31,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:01:31,287 INFO L93 Difference]: Finished difference Result 1741 states and 1897 transitions. [2024-11-13 15:01:31,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-13 15:01:31,288 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 2.409090909090909) internal successors, (159), 67 states have internal predecessors, (159), 0 states have call successors, (0), 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 15:01:31,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:01:31,290 INFO L225 Difference]: With dead ends: 1741 [2024-11-13 15:01:31,290 INFO L226 Difference]: Without dead ends: 1703 [2024-11-13 15:01:31,290 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 85 SyntacticMatches, 12 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2170 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=686, Invalid=3870, Unknown=0, NotChecked=0, Total=4556 [2024-11-13 15:01:31,291 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 322 mSDsluCounter, 1684 mSDsCounter, 0 mSdLazyCounter, 2796 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 1768 SdHoareTripleChecker+Invalid, 2845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:01:31,291 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 1768 Invalid, 2845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2796 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-13 15:01:31,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2024-11-13 15:01:31,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1233. [2024-11-13 15:01:31,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1229 states have (on average 1.114727420667209) internal successors, (1370), 1232 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:01:31,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 1370 transitions. [2024-11-13 15:01:31,302 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 1370 transitions. Word has length 69 [2024-11-13 15:01:31,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:01:31,302 INFO L471 AbstractCegarLoop]: Abstraction has 1233 states and 1370 transitions. [2024-11-13 15:01:31,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 2.409090909090909) internal successors, (159), 67 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:01:31,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 1370 transitions. [2024-11-13 15:01:31,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-13 15:01:31,303 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:01:31,303 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:01:31,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-13 15:01:31,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2024-11-13 15:01:31,504 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:01:31,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:01:31,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1021852862, now seen corresponding path program 13 times [2024-11-13 15:01:31,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:01:31,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334452694] [2024-11-13 15:01:31,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:01:31,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:01:31,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:01:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 117 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:01:32,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:01:32,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334452694] [2024-11-13 15:01:32,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334452694] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:01:32,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372926269] [2024-11-13 15:01:32,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 15:01:32,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:01:32,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:01:32,839 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:01:32,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-13 15:01:33,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:01:33,151 INFO L255 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 130 conjuncts are in the unsatisfiable core [2024-11-13 15:01:33,156 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:01:33,712 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 15:01:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 12 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:01:34,459 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:01:34,507 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 18 treesize of output 16 [2024-11-13 15:01:34,513 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 15:01:34,709 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 12 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:01:34,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372926269] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:01:34,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:01:34,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30, 30] total 59 [2024-11-13 15:01:34,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977731530] [2024-11-13 15:01:34,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:01:34,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-13 15:01:34,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:01:34,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-13 15:01:34,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3252, Unknown=0, NotChecked=0, Total=3422 [2024-11-13 15:01:34,711 INFO L87 Difference]: Start difference. First operand 1233 states and 1370 transitions. Second operand has 59 states, 59 states have (on average 2.406779661016949) internal successors, (142), 59 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 15:01:40,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:01:40,171 INFO L93 Difference]: Finished difference Result 1947 states and 2115 transitions. [2024-11-13 15:01:40,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2024-11-13 15:01:40,172 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.406779661016949) internal successors, (142), 59 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 71 [2024-11-13 15:01:40,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:01:40,175 INFO L225 Difference]: With dead ends: 1947 [2024-11-13 15:01:40,175 INFO L226 Difference]: Without dead ends: 1840 [2024-11-13 15:01:40,176 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=571, Invalid=11419, Unknown=0, NotChecked=0, Total=11990 [2024-11-13 15:01:40,176 INFO L432 NwaCegarLoop]: 107 mSDtfsCounter, 193 mSDsluCounter, 4138 mSDsCounter, 0 mSdLazyCounter, 5525 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 4245 SdHoareTripleChecker+Invalid, 5572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 5525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-13 15:01:40,176 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 4245 Invalid, 5572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 5525 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-13 15:01:40,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2024-11-13 15:01:40,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1364. [2024-11-13 15:01:40,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 1360 states have (on average 1.1161764705882353) internal successors, (1518), 1363 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:01:40,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 1518 transitions. [2024-11-13 15:01:40,187 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 1518 transitions. Word has length 71 [2024-11-13 15:01:40,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:01:40,187 INFO L471 AbstractCegarLoop]: Abstraction has 1364 states and 1518 transitions. [2024-11-13 15:01:40,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.406779661016949) internal successors, (142), 59 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 15:01:40,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 1518 transitions. [2024-11-13 15:01:40,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-13 15:01:40,189 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:01:40,189 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:01:40,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-11-13 15:01:40,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-11-13 15:01:40,390 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:01:40,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:01:40,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1365367640, now seen corresponding path program 9 times [2024-11-13 15:01:40,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:01:40,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627265757] [2024-11-13 15:01:40,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:01:40,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:01:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:01:41,891 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:01:41,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:01:41,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627265757] [2024-11-13 15:01:41,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627265757] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:01:41,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160733879] [2024-11-13 15:01:41,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 15:01:41,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:01:41,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:01:41,894 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:01:41,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-13 15:01:42,330 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-13 15:01:42,330 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:01:42,334 INFO L255 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-11-13 15:01:42,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:01:42,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:01:42,423 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 15:01:42,429 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 15:01:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:01:44,371 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:01:46,886 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:01:47,087 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:01:47,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160733879] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:01:47,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:01:47,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27, 28] total 77 [2024-11-13 15:01:47,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443511106] [2024-11-13 15:01:47,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:01:47,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-11-13 15:01:47,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:01:47,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-11-13 15:01:47,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=5452, Unknown=0, NotChecked=0, Total=6006 [2024-11-13 15:01:47,089 INFO L87 Difference]: Start difference. First operand 1364 states and 1518 transitions. Second operand has 78 states, 77 states have (on average 2.5064935064935066) internal successors, (193), 78 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:01:52,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:01:52,775 INFO L93 Difference]: Finished difference Result 1849 states and 2009 transitions. [2024-11-13 15:01:52,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2024-11-13 15:01:52,776 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 2.5064935064935066) internal successors, (193), 78 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2024-11-13 15:01:52,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:01:52,778 INFO L225 Difference]: With dead ends: 1849 [2024-11-13 15:01:52,778 INFO L226 Difference]: Without dead ends: 1799 [2024-11-13 15:01:52,779 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5421 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1770, Invalid=14742, Unknown=0, NotChecked=0, Total=16512 [2024-11-13 15:01:52,779 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 423 mSDsluCounter, 1225 mSDsCounter, 0 mSdLazyCounter, 3501 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 3614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 3501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:01:52,779 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 1265 Invalid, 3614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 3501 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-13 15:01:52,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2024-11-13 15:01:52,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1472. [2024-11-13 15:01:52,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1468 states have (on average 1.1137602179836512) internal successors, (1635), 1471 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:01:52,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 1635 transitions. [2024-11-13 15:01:52,788 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 1635 transitions. Word has length 71 [2024-11-13 15:01:52,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:01:52,788 INFO L471 AbstractCegarLoop]: Abstraction has 1472 states and 1635 transitions. [2024-11-13 15:01:52,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 2.5064935064935066) internal successors, (193), 78 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:01:52,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 1635 transitions. [2024-11-13 15:01:52,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-13 15:01:52,790 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:01:52,790 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:01:52,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-13 15:01:52,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-11-13 15:01:52,991 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:01:52,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:01:52,991 INFO L85 PathProgramCache]: Analyzing trace with hash 106816879, now seen corresponding path program 8 times [2024-11-13 15:01:52,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:01:52,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121344010] [2024-11-13 15:01:52,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:01:52,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:01:53,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:01:54,056 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 27 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:01:54,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:01:54,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121344010] [2024-11-13 15:01:54,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121344010] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:01:54,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397046803] [2024-11-13 15:01:54,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:01:54,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:01:54,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:01:54,059 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:01:54,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-13 15:01:54,363 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:01:54,363 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:01:54,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-13 15:01:54,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:01:54,930 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 15:01:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 27 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:01:55,341 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:01:55,689 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 15:01:55,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-13 15:01:56,775 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 37 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:01:56,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397046803] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:01:56,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:01:56,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 60 [2024-11-13 15:01:56,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777489654] [2024-11-13 15:01:56,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:01:56,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-13 15:01:56,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:01:56,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-13 15:01:56,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=3202, Unknown=0, NotChecked=0, Total=3540 [2024-11-13 15:01:56,776 INFO L87 Difference]: Start difference. First operand 1472 states and 1635 transitions. Second operand has 60 states, 60 states have (on average 2.8333333333333335) internal successors, (170), 60 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 15:01:58,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:01:58,162 INFO L93 Difference]: Finished difference Result 1568 states and 1728 transitions. [2024-11-13 15:01:58,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-13 15:01:58,162 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.8333333333333335) internal successors, (170), 60 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) Word has length 72 [2024-11-13 15:01:58,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:01:58,164 INFO L225 Difference]: With dead ends: 1568 [2024-11-13 15:01:58,164 INFO L226 Difference]: Without dead ends: 1504 [2024-11-13 15:01:58,164 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=481, Invalid=4489, Unknown=0, NotChecked=0, Total=4970 [2024-11-13 15:01:58,164 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 31 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 1607 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 1614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-13 15:01:58,165 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 1030 Invalid, 1614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1607 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-13 15:01:58,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2024-11-13 15:01:58,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1478. [2024-11-13 15:01:58,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1474 states have (on average 1.110583446404342) internal successors, (1637), 1477 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:01:58,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 1637 transitions. [2024-11-13 15:01:58,174 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 1637 transitions. Word has length 72 [2024-11-13 15:01:58,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:01:58,174 INFO L471 AbstractCegarLoop]: Abstraction has 1478 states and 1637 transitions. [2024-11-13 15:01:58,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.8333333333333335) internal successors, (170), 60 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 15:01:58,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 1637 transitions. [2024-11-13 15:01:58,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-13 15:01:58,175 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:01:58,175 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 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 15:01:58,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-13 15:01:58,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-11-13 15:01:58,375 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:01:58,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:01:58,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1654966824, now seen corresponding path program 10 times [2024-11-13 15:01:58,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:01:58,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352765833] [2024-11-13 15:01:58,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:01:58,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:01:58,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:01:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 70 proven. 141 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:01:59,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:01:59,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352765833] [2024-11-13 15:01:59,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352765833] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:01:59,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037186620] [2024-11-13 15:01:59,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 15:01:59,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:01:59,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:01:59,777 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:01:59,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-13 15:02:00,219 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 15:02:00,219 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:02:00,223 INFO L255 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 125 conjuncts are in the unsatisfiable core [2024-11-13 15:02:00,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:02:00,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:02:00,308 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 15:02:00,312 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 15:02:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 92 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:02:02,699 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:02:05,013 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:02:05,170 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 117 proven. 94 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:02:05,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037186620] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:02:05,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:02:05,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 27] total 77 [2024-11-13 15:02:05,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663768549] [2024-11-13 15:02:05,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:02:05,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-11-13 15:02:05,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:02:05,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-11-13 15:02:05,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=687, Invalid=5319, Unknown=0, NotChecked=0, Total=6006 [2024-11-13 15:02:05,172 INFO L87 Difference]: Start difference. First operand 1478 states and 1637 transitions. Second operand has 78 states, 77 states have (on average 2.8181818181818183) internal successors, (217), 78 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 15:02:09,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:02:09,360 INFO L93 Difference]: Finished difference Result 2093 states and 2260 transitions. [2024-11-13 15:02:09,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-11-13 15:02:09,361 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 2.8181818181818183) internal successors, (217), 78 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) Word has length 73 [2024-11-13 15:02:09,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:02:09,364 INFO L225 Difference]: With dead ends: 2093 [2024-11-13 15:02:09,364 INFO L226 Difference]: Without dead ends: 1989 [2024-11-13 15:02:09,365 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1395, Invalid=9735, Unknown=0, NotChecked=0, Total=11130 [2024-11-13 15:02:09,365 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 299 mSDsluCounter, 1600 mSDsCounter, 0 mSdLazyCounter, 3646 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 1671 SdHoareTripleChecker+Invalid, 3740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 3646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:02:09,365 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 1671 Invalid, 3740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 3646 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-13 15:02:09,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1989 states. [2024-11-13 15:02:09,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1989 to 1528. [2024-11-13 15:02:09,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1524 states have (on average 1.108267716535433) internal successors, (1689), 1527 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:02:09,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 1689 transitions. [2024-11-13 15:02:09,376 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 1689 transitions. Word has length 73 [2024-11-13 15:02:09,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:02:09,376 INFO L471 AbstractCegarLoop]: Abstraction has 1528 states and 1689 transitions. [2024-11-13 15:02:09,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 2.8181818181818183) internal successors, (217), 78 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 15:02:09,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 1689 transitions. [2024-11-13 15:02:09,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-13 15:02:09,378 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:02:09,378 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:02:09,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-11-13 15:02:09,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-11-13 15:02:09,579 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:02:09,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:02:09,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1355371276, now seen corresponding path program 11 times [2024-11-13 15:02:09,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:02:09,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232623836] [2024-11-13 15:02:09,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:02:09,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:02:09,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:02:10,738 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 15:02:10,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:02:10,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232623836] [2024-11-13 15:02:10,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232623836] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:02:10,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254997492] [2024-11-13 15:02:10,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 15:02:10,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:02:10,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:02:10,740 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:02:10,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-13 15:02:11,264 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-13 15:02:11,264 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:02:11,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-13 15:02:11,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:02:11,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:02:11,344 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 15:02:11,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-13 15:02:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 15:02:13,761 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:02:16,354 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:02:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 22 proven. 64 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 15:02:16,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254997492] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:02:16,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:02:16,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 25] total 69 [2024-11-13 15:02:16,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45745945] [2024-11-13 15:02:16,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:02:16,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-13 15:02:16,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:02:16,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-13 15:02:16,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=4351, Unknown=0, NotChecked=0, Total=4830 [2024-11-13 15:02:16,556 INFO L87 Difference]: Start difference. First operand 1528 states and 1689 transitions. Second operand has 70 states, 69 states have (on average 2.753623188405797) internal successors, (190), 70 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:02:23,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:02:23,162 INFO L93 Difference]: Finished difference Result 2027 states and 2204 transitions. [2024-11-13 15:02:23,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2024-11-13 15:02:23,162 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 2.753623188405797) internal successors, (190), 70 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2024-11-13 15:02:23,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:02:23,164 INFO L225 Difference]: With dead ends: 2027 [2024-11-13 15:02:23,164 INFO L226 Difference]: Without dead ends: 1963 [2024-11-13 15:02:23,165 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5155 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=2337, Invalid=15219, Unknown=0, NotChecked=0, Total=17556 [2024-11-13 15:02:23,165 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 314 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 2452 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 2518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-13 15:02:23,165 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 716 Invalid, 2518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2452 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-13 15:02:23,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2024-11-13 15:02:23,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1572. [2024-11-13 15:02:23,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1568 states have (on average 1.1065051020408163) internal successors, (1735), 1571 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:02:23,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 1735 transitions. [2024-11-13 15:02:23,176 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 1735 transitions. Word has length 73 [2024-11-13 15:02:23,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:02:23,176 INFO L471 AbstractCegarLoop]: Abstraction has 1572 states and 1735 transitions. [2024-11-13 15:02:23,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 2.753623188405797) internal successors, (190), 70 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:02:23,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 1735 transitions. [2024-11-13 15:02:23,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-13 15:02:23,178 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:02:23,178 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:02:23,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-13 15:02:23,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:02:23,378 INFO L396 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:02:23,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:02:23,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1854344810, now seen corresponding path program 10 times [2024-11-13 15:02:23,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:02:23,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228937386] [2024-11-13 15:02:23,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:02:23,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:02:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:02:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 145 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:02:24,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:02:24,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228937386] [2024-11-13 15:02:24,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228937386] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:02:24,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818248052] [2024-11-13 15:02:24,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 15:02:24,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:02:24,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:02:24,407 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:02:24,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-13 15:02:24,978 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 15:02:24,978 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:02:24,982 INFO L255 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 127 conjuncts are in the unsatisfiable core [2024-11-13 15:02:24,986 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:02:25,610 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 176 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:02:25,610 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:02:26,234 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 23 treesize of output 19 [2024-11-13 15:02:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 176 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:02:26,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818248052] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:02:26,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:02:26,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 70 [2024-11-13 15:02:26,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879629039] [2024-11-13 15:02:26,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:02:26,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-13 15:02:26,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:02:26,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-13 15:02:26,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=4299, Unknown=0, NotChecked=0, Total=4970 [2024-11-13 15:02:26,939 INFO L87 Difference]: Start difference. First operand 1572 states and 1735 transitions. Second operand has 71 states, 70 states have (on average 2.7) internal successors, (189), 71 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:02:28,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:02:28,822 INFO L93 Difference]: Finished difference Result 2143 states and 2334 transitions. [2024-11-13 15:02:28,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-13 15:02:28,823 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 2.7) internal successors, (189), 71 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2024-11-13 15:02:28,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:02:28,826 INFO L225 Difference]: With dead ends: 2143 [2024-11-13 15:02:28,826 INFO L226 Difference]: Without dead ends: 2119 [2024-11-13 15:02:28,826 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=711, Invalid=4401, Unknown=0, NotChecked=0, Total=5112 [2024-11-13 15:02:28,827 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 469 mSDsluCounter, 2030 mSDsCounter, 0 mSdLazyCounter, 3443 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 2118 SdHoareTripleChecker+Invalid, 3516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 3443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-13 15:02:28,827 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 2118 Invalid, 3516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 3443 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-13 15:02:28,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2024-11-13 15:02:28,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 1569. [2024-11-13 15:02:28,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1569 states, 1565 states have (on average 1.1073482428115016) internal successors, (1733), 1568 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 15:02:28,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1569 states to 1569 states and 1733 transitions. [2024-11-13 15:02:28,844 INFO L78 Accepts]: Start accepts. Automaton has 1569 states and 1733 transitions. Word has length 74 [2024-11-13 15:02:28,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:02:28,844 INFO L471 AbstractCegarLoop]: Abstraction has 1569 states and 1733 transitions. [2024-11-13 15:02:28,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 2.7) internal successors, (189), 71 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:02:28,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1569 states and 1733 transitions. [2024-11-13 15:02:28,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-13 15:02:28,846 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:02:28,846 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 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] [2024-11-13 15:02:28,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-11-13 15:02:29,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:02:29,047 INFO L396 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:02:29,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:02:29,047 INFO L85 PathProgramCache]: Analyzing trace with hash 2079009214, now seen corresponding path program 6 times [2024-11-13 15:02:29,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:02:29,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539075266] [2024-11-13 15:02:29,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:02:29,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:02:29,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:02:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 14 proven. 94 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:02:30,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:02:30,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539075266] [2024-11-13 15:02:30,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539075266] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:02:30,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454614458] [2024-11-13 15:02:30,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 15:02:30,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:02:30,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:02:30,219 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:02:30,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-13 15:02:30,709 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-13 15:02:30,709 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:02:30,713 INFO L255 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 125 conjuncts are in the unsatisfiable core [2024-11-13 15:02:30,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:02:30,733 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2024-11-13 15:02:30,733 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 1 case distinctions, treesize of input 13 treesize of output 11 [2024-11-13 15:02:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:02:33,625 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:02:36,433 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:02:36,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454614458] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:02:36,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:02:36,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 29, 28] total 78 [2024-11-13 15:02:36,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220630979] [2024-11-13 15:02:36,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:02:36,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2024-11-13 15:02:36,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:02:36,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2024-11-13 15:02:36,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=5672, Unknown=0, NotChecked=0, Total=6162 [2024-11-13 15:02:36,434 INFO L87 Difference]: Start difference. First operand 1569 states and 1733 transitions. Second operand has 79 states, 78 states have (on average 2.641025641025641) internal successors, (206), 79 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:02:48,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:02:48,648 INFO L93 Difference]: Finished difference Result 1922 states and 2106 transitions. [2024-11-13 15:02:48,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2024-11-13 15:02:48,648 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 2.641025641025641) internal successors, (206), 79 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2024-11-13 15:02:48,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:02:48,651 INFO L225 Difference]: With dead ends: 1922 [2024-11-13 15:02:48,651 INFO L226 Difference]: Without dead ends: 1880 [2024-11-13 15:02:48,653 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6931 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=2460, Invalid=27990, Unknown=0, NotChecked=0, Total=30450 [2024-11-13 15:02:48,653 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 317 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 4856 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 4965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 4856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-11-13 15:02:48,654 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 1189 Invalid, 4965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 4856 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-11-13 15:02:48,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2024-11-13 15:02:48,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1612. [2024-11-13 15:02:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1608 states have (on average 1.1075870646766168) internal successors, (1781), 1611 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:02:48,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 1781 transitions. [2024-11-13 15:02:48,670 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 1781 transitions. Word has length 74 [2024-11-13 15:02:48,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:02:48,671 INFO L471 AbstractCegarLoop]: Abstraction has 1612 states and 1781 transitions. [2024-11-13 15:02:48,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 2.641025641025641) internal successors, (206), 79 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:02:48,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 1781 transitions. [2024-11-13 15:02:48,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-13 15:02:48,672 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:02:48,673 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:02:48,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-11-13 15:02:48,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:02:48,873 INFO L396 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:02:48,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:02:48,873 INFO L85 PathProgramCache]: Analyzing trace with hash 754589077, now seen corresponding path program 9 times [2024-11-13 15:02:48,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:02:48,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539206074] [2024-11-13 15:02:48,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:02:48,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:02:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:02:49,904 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:02:49,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:02:49,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539206074] [2024-11-13 15:02:49,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539206074] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:02:49,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647409616] [2024-11-13 15:02:49,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 15:02:49,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:02:49,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:02:49,907 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:02:49,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-13 15:02:50,442 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-13 15:02:50,443 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:02:50,446 INFO L255 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-13 15:02:50,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:02:50,629 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 15:02:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 15 proven. 82 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-13 15:02:50,737 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:02:50,789 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 15:02:50,790 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 15:02:50,879 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 15 proven. 82 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-13 15:02:50,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647409616] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:02:50,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:02:50,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18, 18] total 36 [2024-11-13 15:02:50,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644198252] [2024-11-13 15:02:50,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:02:50,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-13 15:02:50,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:02:50,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-13 15:02:50,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1153, Unknown=0, NotChecked=0, Total=1260 [2024-11-13 15:02:50,880 INFO L87 Difference]: Start difference. First operand 1612 states and 1781 transitions. Second operand has 36 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 36 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 15:02:51,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:02:51,905 INFO L93 Difference]: Finished difference Result 2471 states and 2712 transitions. [2024-11-13 15:02:51,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-13 15:02:51,905 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 36 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) Word has length 75 [2024-11-13 15:02:51,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:02:51,909 INFO L225 Difference]: With dead ends: 2471 [2024-11-13 15:02:51,909 INFO L226 Difference]: Without dead ends: 2017 [2024-11-13 15:02:51,909 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=180, Invalid=2076, Unknown=0, NotChecked=0, Total=2256 [2024-11-13 15:02:51,910 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 37 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1103 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 15:02:51,910 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1103 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1477 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 15:02:51,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2024-11-13 15:02:51,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1875. [2024-11-13 15:02:51,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1871 states have (on average 1.1063602351683592) internal successors, (2070), 1874 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:02:51,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 2070 transitions. [2024-11-13 15:02:51,934 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 2070 transitions. Word has length 75 [2024-11-13 15:02:51,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:02:51,934 INFO L471 AbstractCegarLoop]: Abstraction has 1875 states and 2070 transitions. [2024-11-13 15:02:51,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 36 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 15:02:51,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 2070 transitions. [2024-11-13 15:02:51,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-13 15:02:51,936 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:02:51,936 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:02:51,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-11-13 15:02:52,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:02:52,137 INFO L396 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:02:52,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:02:52,138 INFO L85 PathProgramCache]: Analyzing trace with hash 309165105, now seen corresponding path program 14 times [2024-11-13 15:02:52,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:02:52,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769741715] [2024-11-13 15:02:52,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:02:52,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:02:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:02:53,800 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 145 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:02:53,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:02:53,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769741715] [2024-11-13 15:02:53,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769741715] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:02:53,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725406164] [2024-11-13 15:02:53,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:02:53,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:02:53,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:02:53,802 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:02:53,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-11-13 15:02:54,159 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:02:54,160 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:02:54,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 140 conjuncts are in the unsatisfiable core [2024-11-13 15:02:54,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:02:54,892 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 15:02:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 13 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:02:55,768 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:02:55,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-13 15:02:55,823 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 15:02:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 13 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:02:56,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725406164] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:02:56,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:02:56,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32, 32] total 63 [2024-11-13 15:02:56,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020575525] [2024-11-13 15:02:56,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:02:56,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-13 15:02:56,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:02:56,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-13 15:02:56,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3718, Unknown=0, NotChecked=0, Total=3906 [2024-11-13 15:02:56,051 INFO L87 Difference]: Start difference. First operand 1875 states and 2070 transitions. Second operand has 63 states, 63 states have (on average 2.4126984126984126) internal successors, (152), 63 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:03:02,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:03:02,283 INFO L93 Difference]: Finished difference Result 2703 states and 2935 transitions. [2024-11-13 15:03:02,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2024-11-13 15:03:02,283 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.4126984126984126) internal successors, (152), 63 states have internal predecessors, (152), 0 states have call successors, (0), 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 76 [2024-11-13 15:03:02,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:03:02,287 INFO L225 Difference]: With dead ends: 2703 [2024-11-13 15:03:02,287 INFO L226 Difference]: Without dead ends: 2590 [2024-11-13 15:03:02,288 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2578 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=633, Invalid=13173, Unknown=0, NotChecked=0, Total=13806 [2024-11-13 15:03:02,288 INFO L432 NwaCegarLoop]: 113 mSDtfsCounter, 210 mSDsluCounter, 4661 mSDsCounter, 0 mSdLazyCounter, 6219 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 4774 SdHoareTripleChecker+Invalid, 6270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 6219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:03:02,289 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 4774 Invalid, 6270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 6219 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-13 15:03:02,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2024-11-13 15:03:02,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 1996. [2024-11-13 15:03:02,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1996 states, 1992 states have (on average 1.107429718875502) internal successors, (2206), 1995 states have internal predecessors, (2206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:03:02,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 2206 transitions. [2024-11-13 15:03:02,310 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 2206 transitions. Word has length 76 [2024-11-13 15:03:02,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:03:02,310 INFO L471 AbstractCegarLoop]: Abstraction has 1996 states and 2206 transitions. [2024-11-13 15:03:02,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.4126984126984126) internal successors, (152), 63 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:03:02,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 2206 transitions. [2024-11-13 15:03:02,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-13 15:03:02,312 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:03:02,313 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:03:02,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-11-13 15:03:02,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:03:02,513 INFO L396 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:03:02,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:03:02,513 INFO L85 PathProgramCache]: Analyzing trace with hash -734733957, now seen corresponding path program 12 times [2024-11-13 15:03:02,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:03:02,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465930326] [2024-11-13 15:03:02,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:03:02,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:03:02,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:03:03,998 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 56 proven. 122 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:03:03,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:03:03,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465930326] [2024-11-13 15:03:03,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465930326] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:03:03,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264991171] [2024-11-13 15:03:03,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 15:03:03,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:03:03,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:03:04,000 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:03:04,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-11-13 15:03:04,542 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-13 15:03:04,542 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:03:04,546 INFO L255 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-13 15:03:04,550 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:03:04,631 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 15:03:04,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:03:04,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 15:03:06,365 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 70 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:03:06,365 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:03:08,434 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:03:08,630 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 92 proven. 86 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:03:08,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264991171] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:03:08,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:03:08,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 26] total 78 [2024-11-13 15:03:08,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203545077] [2024-11-13 15:03:08,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:03:08,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2024-11-13 15:03:08,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:03:08,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2024-11-13 15:03:08,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=607, Invalid=5555, Unknown=0, NotChecked=0, Total=6162 [2024-11-13 15:03:08,632 INFO L87 Difference]: Start difference. First operand 1996 states and 2206 transitions. Second operand has 79 states, 78 states have (on average 2.8205128205128207) internal successors, (220), 79 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:03:14,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:03:14,215 INFO L93 Difference]: Finished difference Result 2571 states and 2781 transitions. [2024-11-13 15:03:14,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-13 15:03:14,216 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 2.8205128205128207) internal successors, (220), 79 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2024-11-13 15:03:14,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:03:14,219 INFO L225 Difference]: With dead ends: 2571 [2024-11-13 15:03:14,220 INFO L226 Difference]: Without dead ends: 2425 [2024-11-13 15:03:14,221 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5010 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1690, Invalid=16400, Unknown=0, NotChecked=0, Total=18090 [2024-11-13 15:03:14,221 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 369 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 3925 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 4006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 3925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:03:14,221 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 1522 Invalid, 4006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 3925 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-13 15:03:14,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2024-11-13 15:03:14,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1836. [2024-11-13 15:03:14,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1836 states, 1832 states have (on average 1.111353711790393) internal successors, (2036), 1835 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:03:14,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1836 states to 1836 states and 2036 transitions. [2024-11-13 15:03:14,243 INFO L78 Accepts]: Start accepts. Automaton has 1836 states and 2036 transitions. Word has length 77 [2024-11-13 15:03:14,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:03:14,243 INFO L471 AbstractCegarLoop]: Abstraction has 1836 states and 2036 transitions. [2024-11-13 15:03:14,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 2.8205128205128207) internal successors, (220), 79 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:03:14,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1836 states and 2036 transitions. [2024-11-13 15:03:14,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-13 15:03:14,245 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:03:14,245 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 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 15:03:14,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-11-13 15:03:14,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:03:14,446 INFO L396 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:03:14,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:03:14,446 INFO L85 PathProgramCache]: Analyzing trace with hash 511388165, now seen corresponding path program 7 times [2024-11-13 15:03:14,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:03:14,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840424395] [2024-11-13 15:03:14,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:03:14,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:03:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:03:15,708 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 92 proven. 166 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:03:15,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:03:15,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840424395] [2024-11-13 15:03:15,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840424395] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:03:15,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038656894] [2024-11-13 15:03:15,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 15:03:15,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:03:15,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:03:15,710 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:03:15,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-11-13 15:03:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:03:16,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 131 conjuncts are in the unsatisfiable core [2024-11-13 15:03:16,094 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:03:16,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:03:16,130 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 15:03:16,136 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 15:03:18,473 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 117 proven. 141 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:03:18,473 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:03:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 145 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:03:21,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038656894] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:03:21,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:03:21,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29, 28] total 82 [2024-11-13 15:03:21,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396390236] [2024-11-13 15:03:21,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:03:21,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-13 15:03:21,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:03:21,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-13 15:03:21,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=6098, Unknown=0, NotChecked=0, Total=6806 [2024-11-13 15:03:21,355 INFO L87 Difference]: Start difference. First operand 1836 states and 2036 transitions. Second operand has 83 states, 82 states have (on average 2.792682926829268) internal successors, (229), 83 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:03:27,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:03:27,721 INFO L93 Difference]: Finished difference Result 2752 states and 2990 transitions. [2024-11-13 15:03:27,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-13 15:03:27,721 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 2.792682926829268) internal successors, (229), 83 states have internal predecessors, (229), 0 states have call successors, (0), 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 78 [2024-11-13 15:03:27,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:03:27,723 INFO L225 Difference]: With dead ends: 2752 [2024-11-13 15:03:27,723 INFO L226 Difference]: Without dead ends: 2682 [2024-11-13 15:03:27,723 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3436 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1534, Invalid=13472, Unknown=0, NotChecked=0, Total=15006 [2024-11-13 15:03:27,724 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 652 mSDsluCounter, 2593 mSDsCounter, 0 mSdLazyCounter, 6247 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 2678 SdHoareTripleChecker+Invalid, 6392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 6247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-13 15:03:27,724 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [652 Valid, 2678 Invalid, 6392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 6247 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-13 15:03:27,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2024-11-13 15:03:27,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1911. [2024-11-13 15:03:27,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1907 states have (on average 1.10907184058731) internal successors, (2115), 1910 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:03:27,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 2115 transitions. [2024-11-13 15:03:27,743 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 2115 transitions. Word has length 78 [2024-11-13 15:03:27,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:03:27,743 INFO L471 AbstractCegarLoop]: Abstraction has 1911 states and 2115 transitions. [2024-11-13 15:03:27,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 2.792682926829268) internal successors, (229), 83 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:03:27,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 2115 transitions. [2024-11-13 15:03:27,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-13 15:03:27,745 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:03:27,745 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:03:27,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-11-13 15:03:27,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:03:27,946 INFO L396 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:03:27,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:03:27,946 INFO L85 PathProgramCache]: Analyzing trace with hash -2039016277, now seen corresponding path program 10 times [2024-11-13 15:03:27,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:03:27,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957518747] [2024-11-13 15:03:27,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:03:27,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:03:27,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:03:28,412 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 12 proven. 98 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-13 15:03:28,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:03:28,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957518747] [2024-11-13 15:03:28,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957518747] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:03:28,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066694097] [2024-11-13 15:03:28,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 15:03:28,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:03:28,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:03:28,414 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:03:28,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-11-13 15:03:28,854 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 15:03:28,854 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:03:28,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-13 15:03:28,858 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:03:28,915 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 15:03:32,010 INFO L349 Elim1Store]: treesize reduction 16, result has 70.9 percent of original size [2024-11-13 15:03:32,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 61 [2024-11-13 15:03:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 48 proven. 27 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-13 15:03:32,194 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:03:34,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 64 [2024-11-13 15:03:34,473 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 15:03:34,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 96 [2024-11-13 15:03:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-13 15:03:34,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066694097] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:03:34,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:03:34,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 25, 25] total 62 [2024-11-13 15:03:34,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307357370] [2024-11-13 15:03:34,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:03:34,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-13 15:03:34,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:03:34,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-13 15:03:34,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=3463, Unknown=0, NotChecked=0, Total=3906 [2024-11-13 15:03:34,580 INFO L87 Difference]: Start difference. First operand 1911 states and 2115 transitions. Second operand has 63 states, 62 states have (on average 2.435483870967742) internal successors, (151), 63 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:03:38,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:03:38,656 INFO L93 Difference]: Finished difference Result 2129 states and 2311 transitions. [2024-11-13 15:03:38,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-13 15:03:38,656 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.435483870967742) internal successors, (151), 63 states have internal predecessors, (151), 0 states have call successors, (0), 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 78 [2024-11-13 15:03:38,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:03:38,657 INFO L225 Difference]: With dead ends: 2129 [2024-11-13 15:03:38,657 INFO L226 Difference]: Without dead ends: 2091 [2024-11-13 15:03:38,658 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2492 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1085, Invalid=8421, Unknown=0, NotChecked=0, Total=9506 [2024-11-13 15:03:38,658 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 166 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 1918 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-13 15:03:38,658 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 819 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1918 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-13 15:03:38,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2024-11-13 15:03:38,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1521. [2024-11-13 15:03:38,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1518 states have (on average 1.0862977602108037) internal successors, (1649), 1520 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:03:38,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 1649 transitions. [2024-11-13 15:03:38,676 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 1649 transitions. Word has length 78 [2024-11-13 15:03:38,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:03:38,677 INFO L471 AbstractCegarLoop]: Abstraction has 1521 states and 1649 transitions. [2024-11-13 15:03:38,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.435483870967742) internal successors, (151), 63 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:03:38,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 1649 transitions. [2024-11-13 15:03:38,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-13 15:03:38,678 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:03:38,678 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:03:38,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2024-11-13 15:03:38,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:03:38,879 INFO L396 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:03:38,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:03:38,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1329328551, now seen corresponding path program 11 times [2024-11-13 15:03:38,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:03:38,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313511184] [2024-11-13 15:03:38,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:03:38,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:03:38,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:03:40,046 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:03:40,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:03:40,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313511184] [2024-11-13 15:03:40,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313511184] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:03:40,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041012291] [2024-11-13 15:03:40,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 15:03:40,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:03:40,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:03:40,048 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:03:40,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-11-13 15:03:40,513 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-11-13 15:03:40,513 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:03:40,517 INFO L255 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 136 conjuncts are in the unsatisfiable core [2024-11-13 15:03:40,522 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:03:41,235 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 210 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:03:41,235 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:03:41,952 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 23 treesize of output 19 [2024-11-13 15:03:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 210 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:03:42,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041012291] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:03:42,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:03:42,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 75 [2024-11-13 15:03:42,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618797412] [2024-11-13 15:03:42,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:03:42,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-13 15:03:42,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:03:42,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-13 15:03:42,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=4930, Unknown=0, NotChecked=0, Total=5700 [2024-11-13 15:03:42,741 INFO L87 Difference]: Start difference. First operand 1521 states and 1649 transitions. Second operand has 76 states, 75 states have (on average 2.6933333333333334) internal successors, (202), 76 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 15:03:44,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:03:44,608 INFO L93 Difference]: Finished difference Result 1899 states and 2041 transitions. [2024-11-13 15:03:44,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-13 15:03:44,608 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 2.6933333333333334) internal successors, (202), 76 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 79 [2024-11-13 15:03:44,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:03:44,609 INFO L225 Difference]: With dead ends: 1899 [2024-11-13 15:03:44,609 INFO L226 Difference]: Without dead ends: 1849 [2024-11-13 15:03:44,610 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2092 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=813, Invalid=5039, Unknown=0, NotChecked=0, Total=5852 [2024-11-13 15:03:44,610 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 419 mSDsluCounter, 1904 mSDsCounter, 0 mSdLazyCounter, 3358 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 1990 SdHoareTripleChecker+Invalid, 3428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 3358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-13 15:03:44,610 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 1990 Invalid, 3428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 3358 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-13 15:03:44,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2024-11-13 15:03:44,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1490. [2024-11-13 15:03:44,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1487 states have (on average 1.0880968392737054) internal successors, (1618), 1489 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:03:44,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 1618 transitions. [2024-11-13 15:03:44,622 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 1618 transitions. Word has length 79 [2024-11-13 15:03:44,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:03:44,622 INFO L471 AbstractCegarLoop]: Abstraction has 1490 states and 1618 transitions. [2024-11-13 15:03:44,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 2.6933333333333334) internal successors, (202), 76 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 15:03:44,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 1618 transitions. [2024-11-13 15:03:44,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-13 15:03:44,623 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:03:44,623 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:03:44,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2024-11-13 15:03:44,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:03:44,823 INFO L396 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:03:44,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:03:44,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1906515728, now seen corresponding path program 15 times [2024-11-13 15:03:44,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:03:44,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199654471] [2024-11-13 15:03:44,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:03:44,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:03:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:03:46,514 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 176 proven. 267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:03:46,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:03:46,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199654471] [2024-11-13 15:03:46,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199654471] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:03:46,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890555209] [2024-11-13 15:03:46,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 15:03:46,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:03:46,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:03:46,516 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:03:46,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-11-13 15:03:47,084 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-13 15:03:47,084 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:03:47,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 150 conjuncts are in the unsatisfiable core [2024-11-13 15:03:47,093 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:03:47,818 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 15:03:48,823 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 14 proven. 429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:03:48,823 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:03:48,878 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 18 treesize of output 16 [2024-11-13 15:03:48,881 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 15:03:49,103 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 14 proven. 429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:03:49,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890555209] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:03:49,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:03:49,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 34, 34] total 67 [2024-11-13 15:03:49,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591972115] [2024-11-13 15:03:49,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:03:49,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-13 15:03:49,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:03:49,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-13 15:03:49,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4216, Unknown=0, NotChecked=0, Total=4422 [2024-11-13 15:03:49,105 INFO L87 Difference]: Start difference. First operand 1490 states and 1618 transitions. Second operand has 67 states, 67 states have (on average 2.417910447761194) internal successors, (162), 67 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:03:56,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:03:56,949 INFO L93 Difference]: Finished difference Result 2026 states and 2180 transitions. [2024-11-13 15:03:56,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2024-11-13 15:03:56,949 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.417910447761194) internal successors, (162), 67 states have internal predecessors, (162), 0 states have call successors, (0), 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 81 [2024-11-13 15:03:56,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:03:56,951 INFO L225 Difference]: With dead ends: 2026 [2024-11-13 15:03:56,951 INFO L226 Difference]: Without dead ends: 1907 [2024-11-13 15:03:56,951 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2951 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=703, Invalid=15299, Unknown=0, NotChecked=0, Total=16002 [2024-11-13 15:03:56,952 INFO L432 NwaCegarLoop]: 104 mSDtfsCounter, 204 mSDsluCounter, 4824 mSDsCounter, 0 mSdLazyCounter, 7107 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 4928 SdHoareTripleChecker+Invalid, 7162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 7107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:03:56,952 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 4928 Invalid, 7162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 7107 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-11-13 15:03:56,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2024-11-13 15:03:56,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1666. [2024-11-13 15:03:56,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1663 states have (on average 1.0889957907396273) internal successors, (1811), 1665 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:03:56,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 1811 transitions. [2024-11-13 15:03:56,969 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 1811 transitions. Word has length 81 [2024-11-13 15:03:56,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:03:56,969 INFO L471 AbstractCegarLoop]: Abstraction has 1666 states and 1811 transitions. [2024-11-13 15:03:56,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.417910447761194) internal successors, (162), 67 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:03:56,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 1811 transitions. [2024-11-13 15:03:56,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-13 15:03:56,971 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:03:56,971 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:03:56,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2024-11-13 15:03:57,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2024-11-13 15:03:57,172 INFO L396 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:03:57,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:03:57,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1890313702, now seen corresponding path program 13 times [2024-11-13 15:03:57,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:03:57,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041592881] [2024-11-13 15:03:57,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:03:57,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:03:57,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:03:59,047 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:03:59,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:03:59,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041592881] [2024-11-13 15:03:59,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041592881] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:03:59,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019340936] [2024-11-13 15:03:59,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 15:03:59,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:03:59,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:03:59,049 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:03:59,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-11-13 15:03:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:03:59,467 INFO L255 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 132 conjuncts are in the unsatisfiable core [2024-11-13 15:03:59,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:03:59,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:03:59,630 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 15:03:59,637 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 15:04:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:04:02,091 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:04:05,110 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:04:05,306 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:04:05,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019340936] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:04:05,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:04:05,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30, 31] total 87 [2024-11-13 15:04:05,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958496845] [2024-11-13 15:04:05,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:04:05,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-11-13 15:04:05,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:04:05,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-11-13 15:04:05,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=7061, Unknown=0, NotChecked=0, Total=7656 [2024-11-13 15:04:05,308 INFO L87 Difference]: Start difference. First operand 1666 states and 1811 transitions. Second operand has 88 states, 87 states have (on average 2.5632183908045976) internal successors, (223), 88 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 15:04:12,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:04:12,936 INFO L93 Difference]: Finished difference Result 2428 states and 2583 transitions. [2024-11-13 15:04:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2024-11-13 15:04:12,937 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 2.5632183908045976) internal successors, (223), 88 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 81 [2024-11-13 15:04:12,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:04:12,939 INFO L225 Difference]: With dead ends: 2428 [2024-11-13 15:04:12,939 INFO L226 Difference]: Without dead ends: 2342 [2024-11-13 15:04:12,940 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6369 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1888, Invalid=18704, Unknown=0, NotChecked=0, Total=20592 [2024-11-13 15:04:12,940 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 300 mSDsluCounter, 1555 mSDsCounter, 0 mSdLazyCounter, 4481 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 1596 SdHoareTripleChecker+Invalid, 4569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 4481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:04:12,940 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 1596 Invalid, 4569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 4481 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-13 15:04:12,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2024-11-13 15:04:12,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 1747. [2024-11-13 15:04:12,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1744 states have (on average 1.088302752293578) internal successors, (1898), 1746 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:04:12,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 1898 transitions. [2024-11-13 15:04:12,951 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 1898 transitions. Word has length 81 [2024-11-13 15:04:12,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:04:12,952 INFO L471 AbstractCegarLoop]: Abstraction has 1747 states and 1898 transitions. [2024-11-13 15:04:12,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 2.5632183908045976) internal successors, (223), 88 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 15:04:12,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 1898 transitions. [2024-11-13 15:04:12,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-13 15:04:12,953 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:04:12,953 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 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 15:04:12,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2024-11-13 15:04:13,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2024-11-13 15:04:13,154 INFO L396 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:04:13,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:04:13,155 INFO L85 PathProgramCache]: Analyzing trace with hash 2123155302, now seen corresponding path program 14 times [2024-11-13 15:04:13,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:04:13,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389604355] [2024-11-13 15:04:13,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:04:13,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:04:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:04:15,039 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 117 proven. 195 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:04:15,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:04:15,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389604355] [2024-11-13 15:04:15,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389604355] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:04:15,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338974699] [2024-11-13 15:04:15,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:04:15,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:04:15,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:04:15,041 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:04:15,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-11-13 15:04:15,451 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:04:15,451 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:04:15,454 INFO L255 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-11-13 15:04:15,459 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:04:15,557 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 15:04:15,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:04:15,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 15:04:17,415 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 145 proven. 167 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:04:17,416 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:04:19,401 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:04:19,557 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 176 proven. 136 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:04:19,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338974699] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:04:19,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:04:19,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 81 [2024-11-13 15:04:19,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150461679] [2024-11-13 15:04:19,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:04:19,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-11-13 15:04:19,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:04:19,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-11-13 15:04:19,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=715, Invalid=5927, Unknown=0, NotChecked=0, Total=6642 [2024-11-13 15:04:19,560 INFO L87 Difference]: Start difference. First operand 1747 states and 1898 transitions. Second operand has 82 states, 81 states have (on average 3.0123456790123457) internal successors, (244), 82 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:04:22,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:04:22,176 INFO L93 Difference]: Finished difference Result 2427 states and 2586 transitions. [2024-11-13 15:04:22,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-13 15:04:22,177 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 3.0123456790123457) internal successors, (244), 82 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2024-11-13 15:04:22,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:04:22,178 INFO L225 Difference]: With dead ends: 2427 [2024-11-13 15:04:22,178 INFO L226 Difference]: Without dead ends: 2361 [2024-11-13 15:04:22,179 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2064 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=811, Invalid=6499, Unknown=0, NotChecked=0, Total=7310 [2024-11-13 15:04:22,179 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 317 mSDsluCounter, 2089 mSDsCounter, 0 mSdLazyCounter, 3744 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 2165 SdHoareTripleChecker+Invalid, 3796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 3744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:04:22,179 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 2165 Invalid, 3796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 3744 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-13 15:04:22,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2024-11-13 15:04:22,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 1751. [2024-11-13 15:04:22,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1748 states have (on average 1.0863844393592677) internal successors, (1899), 1750 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:04:22,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 1899 transitions. [2024-11-13 15:04:22,197 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 1899 transitions. Word has length 83 [2024-11-13 15:04:22,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:04:22,197 INFO L471 AbstractCegarLoop]: Abstraction has 1751 states and 1899 transitions. [2024-11-13 15:04:22,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 3.0123456790123457) internal successors, (244), 82 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:04:22,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 1899 transitions. [2024-11-13 15:04:22,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-13 15:04:22,199 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:04:22,199 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:04:22,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2024-11-13 15:04:22,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:04:22,399 INFO L396 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:04:22,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:04:22,400 INFO L85 PathProgramCache]: Analyzing trace with hash -577542200, now seen corresponding path program 12 times [2024-11-13 15:04:22,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:04:22,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933964658] [2024-11-13 15:04:22,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:04:22,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:04:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:04:23,528 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 210 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:04:23,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:04:23,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933964658] [2024-11-13 15:04:23,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933964658] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:04:23,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384828126] [2024-11-13 15:04:23,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 15:04:23,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:04:23,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:04:23,530 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:04:23,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-11-13 15:04:24,569 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2024-11-13 15:04:24,569 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:04:24,573 INFO L255 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-11-13 15:04:24,578 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:04:26,088 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 247 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:04:26,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:04:27,196 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 8 treesize of output 6 [2024-11-13 15:04:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 247 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:04:27,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384828126] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:04:27,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:04:27,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 81 [2024-11-13 15:04:27,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557679233] [2024-11-13 15:04:27,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:04:27,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-11-13 15:04:27,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:04:27,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-11-13 15:04:27,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1000, Invalid=5642, Unknown=0, NotChecked=0, Total=6642 [2024-11-13 15:04:27,696 INFO L87 Difference]: Start difference. First operand 1751 states and 1899 transitions. Second operand has 82 states, 81 states have (on average 2.4074074074074074) internal successors, (195), 82 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 15:04:29,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:04:29,068 INFO L93 Difference]: Finished difference Result 2099 states and 2261 transitions. [2024-11-13 15:04:29,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-13 15:04:29,068 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 2.4074074074074074) internal successors, (195), 82 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 84 [2024-11-13 15:04:29,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:04:29,069 INFO L225 Difference]: With dead ends: 2099 [2024-11-13 15:04:29,069 INFO L226 Difference]: Without dead ends: 2069 [2024-11-13 15:04:29,070 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 103 SyntacticMatches, 15 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3373 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1031, Invalid=5775, Unknown=0, NotChecked=0, Total=6806 [2024-11-13 15:04:29,070 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 436 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 2292 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 2374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:04:29,070 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 1359 Invalid, 2374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2292 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-13 15:04:29,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2024-11-13 15:04:29,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1717. [2024-11-13 15:04:29,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1714 states have (on average 1.088098016336056) internal successors, (1865), 1716 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:04:29,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 1865 transitions. [2024-11-13 15:04:29,084 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 1865 transitions. Word has length 84 [2024-11-13 15:04:29,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:04:29,084 INFO L471 AbstractCegarLoop]: Abstraction has 1717 states and 1865 transitions. [2024-11-13 15:04:29,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 2.4074074074074074) internal successors, (195), 82 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 15:04:29,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 1865 transitions. [2024-11-13 15:04:29,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-13 15:04:29,085 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:04:29,086 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 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] [2024-11-13 15:04:29,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2024-11-13 15:04:29,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:04:29,286 INFO L396 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:04:29,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:04:29,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1295358924, now seen corresponding path program 8 times [2024-11-13 15:04:29,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:04:29,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339141719] [2024-11-13 15:04:29,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:04:29,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:04:29,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:04:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 14 proven. 161 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:04:31,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:04:31,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339141719] [2024-11-13 15:04:31,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339141719] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:04:31,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184860931] [2024-11-13 15:04:31,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:04:31,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:04:31,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:04:31,068 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:04:31,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-11-13 15:04:31,481 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:04:31,481 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:04:31,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 129 conjuncts are in the unsatisfiable core [2024-11-13 15:04:31,489 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:04:31,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:04:31,500 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 15:04:31,508 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 15:04:33,453 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:04:33,454 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:04:36,142 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:04:36,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184860931] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:04:36,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:04:36,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 77 [2024-11-13 15:04:36,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157048413] [2024-11-13 15:04:36,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:04:36,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-11-13 15:04:36,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:04:36,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-11-13 15:04:36,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=5432, Unknown=0, NotChecked=0, Total=6006 [2024-11-13 15:04:36,144 INFO L87 Difference]: Start difference. First operand 1717 states and 1865 transitions. Second operand has 78 states, 77 states have (on average 2.909090909090909) internal successors, (224), 78 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:04:44,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:04:44,170 INFO L93 Difference]: Finished difference Result 2526 states and 2705 transitions. [2024-11-13 15:04:44,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2024-11-13 15:04:44,170 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 2.909090909090909) internal successors, (224), 78 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2024-11-13 15:04:44,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:04:44,172 INFO L225 Difference]: With dead ends: 2526 [2024-11-13 15:04:44,172 INFO L226 Difference]: Without dead ends: 2428 [2024-11-13 15:04:44,173 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5948 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=2126, Invalid=19926, Unknown=0, NotChecked=0, Total=22052 [2024-11-13 15:04:44,174 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 331 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 3302 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 3404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 3302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:04:44,174 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 1153 Invalid, 3404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 3302 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-13 15:04:44,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2024-11-13 15:04:44,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 1683. [2024-11-13 15:04:44,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1680 states have (on average 1.0875) internal successors, (1827), 1682 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:04:44,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 1827 transitions. [2024-11-13 15:04:44,193 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 1827 transitions. Word has length 84 [2024-11-13 15:04:44,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:04:44,193 INFO L471 AbstractCegarLoop]: Abstraction has 1683 states and 1827 transitions. [2024-11-13 15:04:44,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 2.909090909090909) internal successors, (224), 78 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:04:44,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 1827 transitions. [2024-11-13 15:04:44,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-13 15:04:44,195 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:04:44,195 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:04:44,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2024-11-13 15:04:44,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:04:44,396 INFO L396 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:04:44,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:04:44,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1760936803, now seen corresponding path program 16 times [2024-11-13 15:04:44,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:04:44,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072401434] [2024-11-13 15:04:44,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:04:44,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:04:44,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:04:46,363 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 210 proven. 302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:04:46,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:04:46,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072401434] [2024-11-13 15:04:46,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072401434] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:04:46,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167372056] [2024-11-13 15:04:46,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 15:04:46,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:04:46,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:04:46,365 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:04:46,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-11-13 15:04:46,963 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 15:04:46,963 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:04:46,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 160 conjuncts are in the unsatisfiable core [2024-11-13 15:04:46,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:04:47,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 15:04:48,910 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 15 proven. 497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:04:48,910 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:04:48,969 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 18 treesize of output 16 [2024-11-13 15:04:48,971 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 15:04:49,208 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 15 proven. 497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:04:49,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167372056] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:04:49,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:04:49,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 36, 36] total 71 [2024-11-13 15:04:49,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010441727] [2024-11-13 15:04:49,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:04:49,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-13 15:04:49,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:04:49,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-13 15:04:49,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=4744, Unknown=0, NotChecked=0, Total=4970 [2024-11-13 15:04:49,210 INFO L87 Difference]: Start difference. First operand 1683 states and 1827 transitions. Second operand has 71 states, 71 states have (on average 2.4225352112676055) internal successors, (172), 71 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:04:58,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:04:58,067 INFO L93 Difference]: Finished difference Result 2246 states and 2417 transitions. [2024-11-13 15:04:58,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2024-11-13 15:04:58,067 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.4225352112676055) internal successors, (172), 71 states have internal predecessors, (172), 0 states have call successors, (0), 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 15:04:58,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:04:58,068 INFO L225 Difference]: With dead ends: 2246 [2024-11-13 15:04:58,068 INFO L226 Difference]: Without dead ends: 2121 [2024-11-13 15:04:58,069 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3372 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=771, Invalid=17319, Unknown=0, NotChecked=0, Total=18090 [2024-11-13 15:04:58,069 INFO L432 NwaCegarLoop]: 109 mSDtfsCounter, 214 mSDsluCounter, 5436 mSDsCounter, 0 mSdLazyCounter, 8158 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 5545 SdHoareTripleChecker+Invalid, 8217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 8158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:04:58,069 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 5545 Invalid, 8217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 8158 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2024-11-13 15:04:58,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2024-11-13 15:04:58,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 1814. [2024-11-13 15:04:58,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1811 states have (on average 1.0877967973495306) internal successors, (1970), 1813 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:04:58,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 1970 transitions. [2024-11-13 15:04:58,081 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 1970 transitions. Word has length 86 [2024-11-13 15:04:58,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:04:58,081 INFO L471 AbstractCegarLoop]: Abstraction has 1814 states and 1970 transitions. [2024-11-13 15:04:58,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.4225352112676055) internal successors, (172), 71 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:04:58,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 1970 transitions. [2024-11-13 15:04:58,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-13 15:04:58,083 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:04:58,083 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:04:58,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2024-11-13 15:04:58,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:04:58,283 INFO L396 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:04:58,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:04:58,284 INFO L85 PathProgramCache]: Analyzing trace with hash -215784088, now seen corresponding path program 9 times [2024-11-13 15:04:58,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:04:58,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821673094] [2024-11-13 15:04:58,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:04:58,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:04:58,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:04:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 30 proven. 118 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 15:04:59,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:04:59,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821673094] [2024-11-13 15:04:59,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821673094] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:04:59,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926104075] [2024-11-13 15:04:59,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 15:04:59,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:04:59,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:04:59,668 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:04:59,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-11-13 15:05:00,477 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-13 15:05:00,477 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:05:00,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-11-13 15:05:00,486 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:05:00,566 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 15:05:00,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:05:00,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 15:05:01,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2024-11-13 15:05:02,299 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:05:02,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 21 [2024-11-13 15:05:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-13 15:05:03,220 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:05:04,726 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 18 treesize of output 16 [2024-11-13 15:05:04,729 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 15:05:06,037 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:05:06,131 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-13 15:05:06,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926104075] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:05:06,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:05:06,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 73 [2024-11-13 15:05:06,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480864942] [2024-11-13 15:05:06,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:05:06,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-11-13 15:05:06,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:05:06,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-11-13 15:05:06,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=5070, Unknown=0, NotChecked=0, Total=5402 [2024-11-13 15:05:06,132 INFO L87 Difference]: Start difference. First operand 1814 states and 1970 transitions. Second operand has 74 states, 73 states have (on average 2.8904109589041096) internal successors, (211), 74 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:05:16,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:05:22,546 WARN L539 Checker$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 15:05:42,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:05:42,969 INFO L93 Difference]: Finished difference Result 3328 states and 3518 transitions. [2024-11-13 15:05:42,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2024-11-13 15:05:42,969 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 2.8904109589041096) internal successors, (211), 74 states have internal predecessors, (211), 0 states have call successors, (0), 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 15:05:42,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:05:42,971 INFO L225 Difference]: With dead ends: 3328 [2024-11-13 15:05:42,971 INFO L226 Difference]: Without dead ends: 3262 [2024-11-13 15:05:42,973 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20417 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=5779, Invalid=60527, Unknown=0, NotChecked=0, Total=66306 [2024-11-13 15:05:42,973 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 766 mSDsluCounter, 1892 mSDsCounter, 0 mSdLazyCounter, 10020 mSolverCounterSat, 217 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 1943 SdHoareTripleChecker+Invalid, 10240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 10020 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:05:42,973 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [766 Valid, 1943 Invalid, 10240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 10020 Invalid, 3 Unknown, 0 Unchecked, 16.2s Time] [2024-11-13 15:05:42,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3262 states. [2024-11-13 15:05:42,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3262 to 1800. [2024-11-13 15:05:42,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1797 states have (on average 1.0879243183082916) internal successors, (1955), 1799 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:05:42,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 1955 transitions. [2024-11-13 15:05:42,989 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 1955 transitions. Word has length 86 [2024-11-13 15:05:42,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:05:42,989 INFO L471 AbstractCegarLoop]: Abstraction has 1800 states and 1955 transitions. [2024-11-13 15:05:42,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 2.8904109589041096) internal successors, (211), 74 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:05:42,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 1955 transitions. [2024-11-13 15:05:42,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-13 15:05:42,991 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:05:42,991 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:05:43,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2024-11-13 15:05:43,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:05:43,191 INFO L396 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:05:43,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:05:43,192 INFO L85 PathProgramCache]: Analyzing trace with hash -179005943, now seen corresponding path program 15 times [2024-11-13 15:05:43,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:05:43,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905888665] [2024-11-13 15:05:43,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:05:43,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:05:43,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:05:44,947 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 97 proven. 172 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:05:44,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:05:44,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905888665] [2024-11-13 15:05:44,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905888665] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:05:44,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54969716] [2024-11-13 15:05:44,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 15:05:44,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:05:44,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:05:44,949 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:05:44,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-11-13 15:05:45,875 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-13 15:05:45,875 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:05:45,879 INFO L255 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-11-13 15:05:45,884 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:05:45,982 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 15:05:45,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:05:45,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 15:05:48,548 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 117 proven. 152 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:05:48,549 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:05:51,833 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:05:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 145 proven. 124 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:05:51,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54969716] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:05:51,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:05:51,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 94 [2024-11-13 15:05:51,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110085634] [2024-11-13 15:05:51,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:05:51,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2024-11-13 15:05:51,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:05:51,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2024-11-13 15:05:51,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=877, Invalid=8053, Unknown=0, NotChecked=0, Total=8930 [2024-11-13 15:05:51,998 INFO L87 Difference]: Start difference. First operand 1800 states and 1955 transitions. Second operand has 95 states, 94 states have (on average 2.6595744680851063) internal successors, (250), 95 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:05:59,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:05:59,582 INFO L93 Difference]: Finished difference Result 2789 states and 2955 transitions. [2024-11-13 15:05:59,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2024-11-13 15:05:59,582 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 2.6595744680851063) internal successors, (250), 95 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2024-11-13 15:05:59,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:05:59,584 INFO L225 Difference]: With dead ends: 2789 [2024-11-13 15:05:59,584 INFO L226 Difference]: Without dead ends: 2501 [2024-11-13 15:05:59,585 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7518 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=2670, Invalid=23736, Unknown=0, NotChecked=0, Total=26406 [2024-11-13 15:05:59,585 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 296 mSDsluCounter, 1622 mSDsCounter, 0 mSdLazyCounter, 4761 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 1679 SdHoareTripleChecker+Invalid, 4829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 4761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:05:59,585 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 1679 Invalid, 4829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 4761 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-11-13 15:05:59,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2024-11-13 15:05:59,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 1790. [2024-11-13 15:05:59,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1790 states, 1787 states have (on average 1.0839395635142697) internal successors, (1937), 1789 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:05:59,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 1937 transitions. [2024-11-13 15:05:59,610 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 1937 transitions. Word has length 87 [2024-11-13 15:05:59,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:05:59,610 INFO L471 AbstractCegarLoop]: Abstraction has 1790 states and 1937 transitions. [2024-11-13 15:05:59,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 2.6595744680851063) internal successors, (250), 95 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:05:59,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 1937 transitions. [2024-11-13 15:05:59,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-13 15:05:59,614 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:05:59,614 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 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 15:05:59,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2024-11-13 15:05:59,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:05:59,815 INFO L396 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:05:59,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:05:59,815 INFO L85 PathProgramCache]: Analyzing trace with hash -569437113, now seen corresponding path program 16 times [2024-11-13 15:05:59,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:05:59,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274549974] [2024-11-13 15:05:59,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:05:59,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:05:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:06:01,662 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 145 proven. 225 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:06:01,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:06:01,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274549974] [2024-11-13 15:06:01,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274549974] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:06:01,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261512525] [2024-11-13 15:06:01,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 15:06:01,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:06:01,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:06:01,664 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:06:01,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-11-13 15:06:02,439 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 15:06:02,439 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:06:02,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 166 conjuncts are in the unsatisfiable core [2024-11-13 15:06:02,449 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:06:02,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:06:02,546 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 15:06:02,552 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 15:06:05,912 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:06:05,912 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:06:09,239 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:06:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:06:09,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261512525] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:06:09,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:06:09,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 35, 35] total 100 [2024-11-13 15:06:09,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671837212] [2024-11-13 15:06:09,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:06:09,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2024-11-13 15:06:09,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:06:09,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2024-11-13 15:06:09,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=9138, Unknown=0, NotChecked=0, Total=10100 [2024-11-13 15:06:09,464 INFO L87 Difference]: Start difference. First operand 1790 states and 1937 transitions. Second operand has 101 states, 100 states have (on average 2.62) internal successors, (262), 101 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:06:17,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:06:17,203 INFO L93 Difference]: Finished difference Result 2615 states and 2780 transitions. [2024-11-13 15:06:17,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-11-13 15:06:17,203 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 100 states have (on average 2.62) internal successors, (262), 101 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2024-11-13 15:06:17,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:06:17,205 INFO L225 Difference]: With dead ends: 2615 [2024-11-13 15:06:17,205 INFO L226 Difference]: Without dead ends: 2551 [2024-11-13 15:06:17,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6430 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=2385, Invalid=19077, Unknown=0, NotChecked=0, Total=21462 [2024-11-13 15:06:17,206 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 438 mSDsluCounter, 1874 mSDsCounter, 0 mSdLazyCounter, 5440 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 1932 SdHoareTripleChecker+Invalid, 5593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 5440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-13 15:06:17,206 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 1932 Invalid, 5593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 5440 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-13 15:06:17,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2024-11-13 15:06:17,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 1862. [2024-11-13 15:06:17,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1859 states have (on average 1.083916083916084) internal successors, (2015), 1861 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:06:17,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 2015 transitions. [2024-11-13 15:06:17,219 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 2015 transitions. Word has length 88 [2024-11-13 15:06:17,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:06:17,220 INFO L471 AbstractCegarLoop]: Abstraction has 1862 states and 2015 transitions. [2024-11-13 15:06:17,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 100 states have (on average 2.62) internal successors, (262), 101 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:06:17,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 2015 transitions. [2024-11-13 15:06:17,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-13 15:06:17,222 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:06:17,222 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:06:17,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2024-11-13 15:06:17,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2024-11-13 15:06:17,423 INFO L396 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:06:17,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:06:17,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1165607819, now seen corresponding path program 13 times [2024-11-13 15:06:17,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:06:17,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289822266] [2024-11-13 15:06:17,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:06:17,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:06:17,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:06:18,670 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 247 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:06:18,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:06:18,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289822266] [2024-11-13 15:06:18,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289822266] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:06:18,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789515257] [2024-11-13 15:06:18,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 15:06:18,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:06:18,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:06:18,672 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:06:18,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-11-13 15:06:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:06:19,135 INFO L255 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 150 conjuncts are in the unsatisfiable core [2024-11-13 15:06:19,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:06:20,064 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 287 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:06:20,065 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:06:21,044 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 15:06:21,582 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 287 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:06:21,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789515257] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:06:21,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:06:21,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 35] total 71 [2024-11-13 15:06:21,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866448434] [2024-11-13 15:06:21,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:06:21,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-11-13 15:06:21,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:06:21,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-11-13 15:06:21,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=4491, Unknown=0, NotChecked=0, Total=5112 [2024-11-13 15:06:21,584 INFO L87 Difference]: Start difference. First operand 1862 states and 2015 transitions. Second operand has 72 states, 71 states have (on average 2.507042253521127) internal successors, (178), 72 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:06:23,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:06:23,870 INFO L93 Difference]: Finished difference Result 2316 states and 2483 transitions. [2024-11-13 15:06:23,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-13 15:06:23,871 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 2.507042253521127) internal successors, (178), 72 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2024-11-13 15:06:23,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:06:23,872 INFO L225 Difference]: With dead ends: 2316 [2024-11-13 15:06:23,872 INFO L226 Difference]: Without dead ends: 2286 [2024-11-13 15:06:23,873 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 124 SyntacticMatches, 16 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2681 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=654, Invalid=4602, Unknown=0, NotChecked=0, Total=5256 [2024-11-13 15:06:23,873 INFO L432 NwaCegarLoop]: 93 mSDtfsCounter, 457 mSDsluCounter, 2205 mSDsCounter, 0 mSdLazyCounter, 4112 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 2298 SdHoareTripleChecker+Invalid, 4190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 4112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:06:23,873 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 2298 Invalid, 4190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 4112 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-13 15:06:23,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2024-11-13 15:06:23,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 1831. [2024-11-13 15:06:23,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1828 states have (on average 1.0853391684901532) internal successors, (1984), 1830 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:06:23,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 1984 transitions. [2024-11-13 15:06:23,888 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 1984 transitions. Word has length 89 [2024-11-13 15:06:23,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:06:23,888 INFO L471 AbstractCegarLoop]: Abstraction has 1831 states and 1984 transitions. [2024-11-13 15:06:23,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 2.507042253521127) internal successors, (178), 72 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:06:23,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 1984 transitions. [2024-11-13 15:06:23,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-13 15:06:23,890 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:06:23,890 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:06:23,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2024-11-13 15:06:24,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2024-11-13 15:06:24,090 INFO L396 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:06:24,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:06:24,091 INFO L85 PathProgramCache]: Analyzing trace with hash -251073502, now seen corresponding path program 17 times [2024-11-13 15:06:24,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:06:24,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387793021] [2024-11-13 15:06:24,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:06:24,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:06:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:06:26,288 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 247 proven. 339 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:06:26,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:06:26,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387793021] [2024-11-13 15:06:26,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387793021] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:06:26,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297730098] [2024-11-13 15:06:26,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 15:06:26,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:06:26,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:06:26,290 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:06:26,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-11-13 15:06:26,878 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-11-13 15:06:26,878 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:06:26,882 INFO L255 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 170 conjuncts are in the unsatisfiable core [2024-11-13 15:06:26,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:06:27,764 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 15:06:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 16 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:06:29,013 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:06:29,072 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 18 treesize of output 16 [2024-11-13 15:06:29,074 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 15:06:29,313 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 16 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:06:29,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297730098] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:06:29,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:06:29,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 38, 38] total 75 [2024-11-13 15:06:29,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600769228] [2024-11-13 15:06:29,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:06:29,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-11-13 15:06:29,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:06:29,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-11-13 15:06:29,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=5303, Unknown=0, NotChecked=0, Total=5550 [2024-11-13 15:06:29,315 INFO L87 Difference]: Start difference. First operand 1831 states and 1984 transitions. Second operand has 75 states, 75 states have (on average 2.4266666666666667) internal successors, (182), 75 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:06:39,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:06:39,187 INFO L93 Difference]: Finished difference Result 2497 states and 2677 transitions. [2024-11-13 15:06:39,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2024-11-13 15:06:39,188 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.4266666666666667) internal successors, (182), 75 states have internal predecessors, (182), 0 states have call successors, (0), 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 91 [2024-11-13 15:06:39,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:06:39,189 INFO L225 Difference]: With dead ends: 2497 [2024-11-13 15:06:39,189 INFO L226 Difference]: Without dead ends: 2366 [2024-11-13 15:06:39,190 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3821 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=842, Invalid=19464, Unknown=0, NotChecked=0, Total=20306 [2024-11-13 15:06:39,190 INFO L432 NwaCegarLoop]: 113 mSDtfsCounter, 223 mSDsluCounter, 6001 mSDsCounter, 0 mSdLazyCounter, 9276 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 6114 SdHoareTripleChecker+Invalid, 9339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 9276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:06:39,190 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 6114 Invalid, 9339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 9276 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2024-11-13 15:06:39,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2366 states. [2024-11-13 15:06:39,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2366 to 1969. [2024-11-13 15:06:39,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1966 states have (on average 1.0859613428280772) internal successors, (2135), 1968 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:06:39,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 2135 transitions. [2024-11-13 15:06:39,202 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 2135 transitions. Word has length 91 [2024-11-13 15:06:39,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:06:39,202 INFO L471 AbstractCegarLoop]: Abstraction has 1969 states and 2135 transitions. [2024-11-13 15:06:39,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.4266666666666667) internal successors, (182), 75 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:06:39,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 2135 transitions. [2024-11-13 15:06:39,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-13 15:06:39,203 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:06:39,203 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:06:39,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2024-11-13 15:06:39,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:06:39,404 INFO L396 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:06:39,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:06:39,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1809238388, now seen corresponding path program 17 times [2024-11-13 15:06:39,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:06:39,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255775028] [2024-11-13 15:06:39,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:06:39,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:06:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:06:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:06:42,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:06:42,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255775028] [2024-11-13 15:06:42,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255775028] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:06:42,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958247332] [2024-11-13 15:06:42,235 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 15:06:42,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:06:42,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:06:42,236 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:06:42,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-11-13 15:06:42,961 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-11-13 15:06:42,961 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:06:42,965 INFO L255 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-11-13 15:06:42,970 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:06:43,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:06:43,127 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 15:06:43,134 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 15:06:47,033 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 88 proven. 149 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:06:47,033 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:06:51,654 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:06:52,064 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 117 proven. 120 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:06:52,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958247332] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:06:52,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:06:52,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 94 [2024-11-13 15:06:52,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960515636] [2024-11-13 15:06:52,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:06:52,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2024-11-13 15:06:52,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:06:52,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2024-11-13 15:06:52,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=8331, Unknown=0, NotChecked=0, Total=8930 [2024-11-13 15:06:52,066 INFO L87 Difference]: Start difference. First operand 1969 states and 2135 transitions. Second operand has 95 states, 94 states have (on average 2.6914893617021276) internal successors, (253), 95 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:07:06,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:07:06,454 INFO L93 Difference]: Finished difference Result 2918 states and 3085 transitions. [2024-11-13 15:07:06,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2024-11-13 15:07:06,454 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 2.6914893617021276) internal successors, (253), 95 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2024-11-13 15:07:06,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:07:06,456 INFO L225 Difference]: With dead ends: 2918 [2024-11-13 15:07:06,456 INFO L226 Difference]: Without dead ends: 2774 [2024-11-13 15:07:06,457 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6221 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=2434, Invalid=28016, Unknown=0, NotChecked=0, Total=30450 [2024-11-13 15:07:06,457 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 487 mSDsluCounter, 1578 mSDsCounter, 0 mSdLazyCounter, 5278 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 1621 SdHoareTripleChecker+Invalid, 5428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 5278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:07:06,457 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [487 Valid, 1621 Invalid, 5428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 5278 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2024-11-13 15:07:06,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2774 states. [2024-11-13 15:07:06,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2774 to 1899. [2024-11-13 15:07:06,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1896 states have (on average 1.0864978902953586) internal successors, (2060), 1898 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:07:06,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 2060 transitions. [2024-11-13 15:07:06,470 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 2060 transitions. Word has length 91 [2024-11-13 15:07:06,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:07:06,470 INFO L471 AbstractCegarLoop]: Abstraction has 1899 states and 2060 transitions. [2024-11-13 15:07:06,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 2.6914893617021276) internal successors, (253), 95 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:07:06,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 2060 transitions. [2024-11-13 15:07:06,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-13 15:07:06,472 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:07:06,472 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:07:06,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2024-11-13 15:07:06,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:07:06,672 INFO L396 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:07:06,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:07:06,672 INFO L85 PathProgramCache]: Analyzing trace with hash -282044755, now seen corresponding path program 1 times [2024-11-13 15:07:06,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:07:06,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505221508] [2024-11-13 15:07:06,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:07:06,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:07:06,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:07:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 149 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:07:07,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:07:07,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505221508] [2024-11-13 15:07:07,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505221508] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:07:07,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438877237] [2024-11-13 15:07:07,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:07:07,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:07:07,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:07:07,695 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:07:07,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2024-11-13 15:07:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:07:08,176 INFO L255 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-13 15:07:08,178 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:07:08,644 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 15:07:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 82 proven. 138 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 15:07:09,054 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:07:09,119 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 15:07:09,121 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 15:07:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 95 proven. 125 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 15:07:09,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438877237] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:07:09,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:07:09,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 60 [2024-11-13 15:07:09,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978180697] [2024-11-13 15:07:09,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:07:09,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-13 15:07:09,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:07:09,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-13 15:07:09,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=3158, Unknown=0, NotChecked=0, Total=3540 [2024-11-13 15:07:09,835 INFO L87 Difference]: Start difference. First operand 1899 states and 2060 transitions. Second operand has 60 states, 60 states have (on average 3.4) internal successors, (204), 60 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:07:12,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:07:12,059 INFO L93 Difference]: Finished difference Result 1991 states and 2148 transitions. [2024-11-13 15:07:12,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-13 15:07:12,060 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.4) internal successors, (204), 60 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2024-11-13 15:07:12,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:07:12,061 INFO L225 Difference]: With dead ends: 1991 [2024-11-13 15:07:12,061 INFO L226 Difference]: Without dead ends: 1850 [2024-11-13 15:07:12,061 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2282 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=909, Invalid=7647, Unknown=0, NotChecked=0, Total=8556 [2024-11-13 15:07:12,061 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 69 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-13 15:07:12,062 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 672 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1426 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-13 15:07:12,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2024-11-13 15:07:12,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1806. [2024-11-13 15:07:12,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1803 states have (on average 1.0881863560732112) internal successors, (1962), 1805 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:07:12,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 1962 transitions. [2024-11-13 15:07:12,072 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 1962 transitions. Word has length 91 [2024-11-13 15:07:12,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:07:12,072 INFO L471 AbstractCegarLoop]: Abstraction has 1806 states and 1962 transitions. [2024-11-13 15:07:12,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.4) internal successors, (204), 60 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:07:12,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 1962 transitions. [2024-11-13 15:07:12,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-13 15:07:12,073 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:07:12,073 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 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] [2024-11-13 15:07:12,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2024-11-13 15:07:12,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:07:12,273 INFO L396 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:07:12,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:07:12,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1601576630, now seen corresponding path program 10 times [2024-11-13 15:07:12,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:07:12,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074259823] [2024-11-13 15:07:12,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:07:12,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:07:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:07:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 4 proven. 316 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:07:14,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:07:14,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074259823] [2024-11-13 15:07:14,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074259823] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:07:14,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380046815] [2024-11-13 15:07:14,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 15:07:14,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:07:14,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:07:14,487 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:07:14,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-11-13 15:07:15,339 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 15:07:15,339 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:07:15,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 160 conjuncts are in the unsatisfiable core [2024-11-13 15:07:15,349 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:07:15,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:07:15,356 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 15:07:15,362 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 15:07:18,352 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:07:18,353 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:07:21,925 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:07:21,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380046815] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:07:21,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:07:21,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 94 [2024-11-13 15:07:21,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560800872] [2024-11-13 15:07:21,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:07:21,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2024-11-13 15:07:21,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:07:21,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2024-11-13 15:07:21,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=8391, Unknown=0, NotChecked=0, Total=8930 [2024-11-13 15:07:21,928 INFO L87 Difference]: Start difference. First operand 1806 states and 1962 transitions. Second operand has 95 states, 94 states have (on average 2.7127659574468086) internal successors, (255), 95 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:07:35,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:07:35,448 INFO L93 Difference]: Finished difference Result 3047 states and 3258 transitions. [2024-11-13 15:07:35,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2024-11-13 15:07:35,448 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 2.7127659574468086) internal successors, (255), 95 states have internal predecessors, (255), 0 states have call successors, (0), 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 15:07:35,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:07:35,450 INFO L225 Difference]: With dead ends: 3047 [2024-11-13 15:07:35,450 INFO L226 Difference]: Without dead ends: 2953 [2024-11-13 15:07:35,451 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8375 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=2282, Invalid=29580, Unknown=0, NotChecked=0, Total=31862 [2024-11-13 15:07:35,451 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 644 mSDsluCounter, 2476 mSDsCounter, 0 mSdLazyCounter, 7401 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 2528 SdHoareTripleChecker+Invalid, 7596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 7401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:07:35,451 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [644 Valid, 2528 Invalid, 7596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 7401 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2024-11-13 15:07:35,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2953 states. [2024-11-13 15:07:35,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2953 to 1776. [2024-11-13 15:07:35,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1773 states have (on average 1.0891144952058658) internal successors, (1931), 1775 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:07:35,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 1931 transitions. [2024-11-13 15:07:35,465 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 1931 transitions. Word has length 92 [2024-11-13 15:07:35,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:07:35,465 INFO L471 AbstractCegarLoop]: Abstraction has 1776 states and 1931 transitions. [2024-11-13 15:07:35,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 2.7127659574468086) internal successors, (255), 95 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:07:35,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 1931 transitions. [2024-11-13 15:07:35,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-13 15:07:35,467 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:07:35,468 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:07:35,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2024-11-13 15:07:35,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:07:35,668 INFO L396 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:07:35,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:07:35,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1646733426, now seen corresponding path program 18 times [2024-11-13 15:07:35,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:07:35,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924469325] [2024-11-13 15:07:35,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:07:35,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:07:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:07:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-13 15:07:37,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:07:37,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924469325] [2024-11-13 15:07:37,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924469325] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:07:37,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111656089] [2024-11-13 15:07:37,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 15:07:37,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:07:37,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:07:37,646 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:07:37,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2024-11-13 15:07:38,558 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-13 15:07:38,558 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:07:38,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 128 conjuncts are in the unsatisfiable core [2024-11-13 15:07:38,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:07:38,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:07:38,672 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 15:07:38,678 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 15:07:42,260 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-13 15:07:42,261 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:07:46,766 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:07:47,033 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-13 15:07:47,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111656089] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:07:47,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:07:47,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 33, 34] total 92 [2024-11-13 15:07:47,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745052867] [2024-11-13 15:07:47,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:07:47,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2024-11-13 15:07:47,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:07:47,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2024-11-13 15:07:47,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=7791, Unknown=0, NotChecked=0, Total=8556 [2024-11-13 15:07:47,035 INFO L87 Difference]: Start difference. First operand 1776 states and 1931 transitions. Second operand has 93 states, 92 states have (on average 2.5869565217391304) internal successors, (238), 93 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:07:56,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:07:56,497 INFO L93 Difference]: Finished difference Result 2544 states and 2699 transitions. [2024-11-13 15:07:56,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2024-11-13 15:07:56,497 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 92 states have (on average 2.5869565217391304) internal successors, (238), 93 states have internal predecessors, (238), 0 states have call successors, (0), 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 15:07:56,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:07:56,498 INFO L225 Difference]: With dead ends: 2544 [2024-11-13 15:07:56,498 INFO L226 Difference]: Without dead ends: 2544 [2024-11-13 15:07:56,499 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6817 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=2778, Invalid=21092, Unknown=0, NotChecked=0, Total=23870 [2024-11-13 15:07:56,500 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 307 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 3785 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 3892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 3785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:07:56,500 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 1009 Invalid, 3892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 3785 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-11-13 15:07:56,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2024-11-13 15:07:56,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 1788. [2024-11-13 15:07:56,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1785 states have (on average 1.088515406162465) internal successors, (1943), 1787 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:07:56,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 1943 transitions. [2024-11-13 15:07:56,510 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 1943 transitions. Word has length 92 [2024-11-13 15:07:56,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:07:56,510 INFO L471 AbstractCegarLoop]: Abstraction has 1788 states and 1943 transitions. [2024-11-13 15:07:56,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 92 states have (on average 2.5869565217391304) internal successors, (238), 93 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:07:56,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 1943 transitions. [2024-11-13 15:07:56,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-13 15:07:56,512 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:07:56,512 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 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 15:07:56,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2024-11-13 15:07:56,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:07:56,713 INFO L396 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:07:56,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:07:56,713 INFO L85 PathProgramCache]: Analyzing trace with hash -393226944, now seen corresponding path program 11 times [2024-11-13 15:07:56,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:07:56,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828057231] [2024-11-13 15:07:56,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:07:56,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:07:56,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:07:58,534 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 176 proven. 256 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:07:58,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:07:58,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828057231] [2024-11-13 15:07:58,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828057231] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:07:58,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950116474] [2024-11-13 15:07:58,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 15:07:58,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:07:58,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:07:58,536 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:07:58,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2024-11-13 15:07:59,227 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-11-13 15:07:59,227 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:07:59,233 INFO L255 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 173 conjuncts are in the unsatisfiable core [2024-11-13 15:07:59,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:07:59,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:07:59,285 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 15:07:59,289 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 15:08:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 432 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:08:02,952 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:08:07,152 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 432 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:08:07,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950116474] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:08:07,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:08:07,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 36, 35] total 102 [2024-11-13 15:08:07,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211664690] [2024-11-13 15:08:07,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:08:07,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2024-11-13 15:08:07,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:08:07,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2024-11-13 15:08:07,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=845, Invalid=9661, Unknown=0, NotChecked=0, Total=10506 [2024-11-13 15:08:07,154 INFO L87 Difference]: Start difference. First operand 1788 states and 1943 transitions. Second operand has 103 states, 102 states have (on average 2.6862745098039214) internal successors, (274), 103 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 15:08:19,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:08:19,164 INFO L93 Difference]: Finished difference Result 2819 states and 2994 transitions. [2024-11-13 15:08:19,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2024-11-13 15:08:19,164 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 102 states have (on average 2.6862745098039214) internal successors, (274), 103 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 93 [2024-11-13 15:08:19,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:08:19,165 INFO L225 Difference]: With dead ends: 2819 [2024-11-13 15:08:19,166 INFO L226 Difference]: Without dead ends: 2737 [2024-11-13 15:08:19,166 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6037 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=2197, Invalid=25193, Unknown=0, NotChecked=0, Total=27390 [2024-11-13 15:08:19,167 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 705 mSDsluCounter, 2888 mSDsCounter, 0 mSdLazyCounter, 7924 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 2958 SdHoareTripleChecker+Invalid, 8067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 7924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:08:19,167 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [705 Valid, 2958 Invalid, 8067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 7924 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2024-11-13 15:08:19,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2737 states. [2024-11-13 15:08:19,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2737 to 1766. [2024-11-13 15:08:19,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1763 states have (on average 1.0873511060692003) internal successors, (1917), 1765 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:08:19,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 1917 transitions. [2024-11-13 15:08:19,187 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 1917 transitions. Word has length 93 [2024-11-13 15:08:19,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:08:19,187 INFO L471 AbstractCegarLoop]: Abstraction has 1766 states and 1917 transitions. [2024-11-13 15:08:19,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 102 states have (on average 2.6862745098039214) internal successors, (274), 103 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 15:08:19,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 1917 transitions. [2024-11-13 15:08:19,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-13 15:08:19,189 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:08:19,189 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:08:19,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2024-11-13 15:08:19,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:08:19,389 INFO L396 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:08:19,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:08:19,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1969305584, now seen corresponding path program 19 times [2024-11-13 15:08:19,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:08:19,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35951071] [2024-11-13 15:08:19,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:08:19,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:08:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:08:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 15:08:21,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:08:21,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35951071] [2024-11-13 15:08:21,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35951071] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:08:21,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100053606] [2024-11-13 15:08:21,766 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 15:08:21,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:08:21,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:08:21,768 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:08:21,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2024-11-13 15:08:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:08:22,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-11-13 15:08:22,319 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:08:22,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:08:22,426 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 15:08:22,432 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 15:08:26,876 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 70 proven. 130 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 15:08:26,876 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:08:31,640 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:08:31,897 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 92 proven. 108 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 15:08:31,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100053606] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:08:31,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:08:31,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32, 34] total 94 [2024-11-13 15:08:31,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632214138] [2024-11-13 15:08:31,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:08:31,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2024-11-13 15:08:31,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:08:31,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2024-11-13 15:08:31,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=8106, Unknown=0, NotChecked=0, Total=8930 [2024-11-13 15:08:31,899 INFO L87 Difference]: Start difference. First operand 1766 states and 1917 transitions. Second operand has 95 states, 94 states have (on average 2.6595744680851063) internal successors, (250), 95 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:08:46,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:08:46,214 INFO L93 Difference]: Finished difference Result 2823 states and 2973 transitions. [2024-11-13 15:08:46,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2024-11-13 15:08:46,215 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 2.6595744680851063) internal successors, (250), 95 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2024-11-13 15:08:46,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:08:46,216 INFO L225 Difference]: With dead ends: 2823 [2024-11-13 15:08:46,216 INFO L226 Difference]: Without dead ends: 2721 [2024-11-13 15:08:46,217 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9613 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=3841, Invalid=30569, Unknown=0, NotChecked=0, Total=34410 [2024-11-13 15:08:46,218 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 391 mSDsluCounter, 1446 mSDsCounter, 0 mSdLazyCounter, 5026 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1483 SdHoareTripleChecker+Invalid, 5163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 5026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:08:46,218 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 1483 Invalid, 5163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 5026 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2024-11-13 15:08:46,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2024-11-13 15:08:46,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 1768. [2024-11-13 15:08:46,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1765 states have (on average 1.0861189801699718) internal successors, (1917), 1767 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:08:46,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 1917 transitions. [2024-11-13 15:08:46,233 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 1917 transitions. Word has length 93 [2024-11-13 15:08:46,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:08:46,233 INFO L471 AbstractCegarLoop]: Abstraction has 1768 states and 1917 transitions. [2024-11-13 15:08:46,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 2.6595744680851063) internal successors, (250), 95 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:08:46,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 1917 transitions. [2024-11-13 15:08:46,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-13 15:08:46,234 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:08:46,235 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:08:46,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2024-11-13 15:08:46,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:08:46,435 INFO L396 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:08:46,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:08:46,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1958296326, now seen corresponding path program 14 times [2024-11-13 15:08:46,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:08:46,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502947294] [2024-11-13 15:08:46,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:08:46,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:08:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:08:47,851 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 287 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:08:47,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:08:47,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502947294] [2024-11-13 15:08:47,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502947294] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:08:47,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110139104] [2024-11-13 15:08:47,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:08:47,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:08:47,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:08:47,853 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:08:47,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2024-11-13 15:08:48,386 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:08:48,386 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:08:48,390 INFO L255 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 163 conjuncts are in the unsatisfiable core [2024-11-13 15:08:48,395 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:08:49,456 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 330 proven. 302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:08:49,456 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:08:50,558 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 23 treesize of output 19 [2024-11-13 15:08:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 330 proven. 302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:08:51,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110139104] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:08:51,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:08:51,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 90 [2024-11-13 15:08:51,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714555117] [2024-11-13 15:08:51,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:08:51,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2024-11-13 15:08:51,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:08:51,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2024-11-13 15:08:51,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1109, Invalid=7081, Unknown=0, NotChecked=0, Total=8190 [2024-11-13 15:08:51,692 INFO L87 Difference]: Start difference. First operand 1768 states and 1917 transitions. Second operand has 91 states, 90 states have (on average 2.6777777777777776) internal successors, (241), 91 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:08:54,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:08:54,332 INFO L93 Difference]: Finished difference Result 2322 states and 2486 transitions. [2024-11-13 15:08:54,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-13 15:08:54,332 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 90 states have (on average 2.6777777777777776) internal successors, (241), 91 states have internal predecessors, (241), 0 states have call successors, (0), 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 94 [2024-11-13 15:08:54,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:08:54,334 INFO L225 Difference]: With dead ends: 2322 [2024-11-13 15:08:54,334 INFO L226 Difference]: Without dead ends: 2292 [2024-11-13 15:08:54,334 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3106 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1161, Invalid=7211, Unknown=0, NotChecked=0, Total=8372 [2024-11-13 15:08:54,334 INFO L432 NwaCegarLoop]: 97 mSDtfsCounter, 579 mSDsluCounter, 2286 mSDsCounter, 0 mSdLazyCounter, 4409 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 2383 SdHoareTripleChecker+Invalid, 4516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 4409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:08:54,335 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 2383 Invalid, 4516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 4409 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-13 15:08:54,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2292 states. [2024-11-13 15:08:54,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2292 to 1728. [2024-11-13 15:08:54,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1725 states have (on average 1.0881159420289854) internal successors, (1877), 1727 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:08:54,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 1877 transitions. [2024-11-13 15:08:54,348 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 1877 transitions. Word has length 94 [2024-11-13 15:08:54,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:08:54,348 INFO L471 AbstractCegarLoop]: Abstraction has 1728 states and 1877 transitions. [2024-11-13 15:08:54,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 90 states have (on average 2.6777777777777776) internal successors, (241), 91 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:08:54,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 1877 transitions. [2024-11-13 15:08:54,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-13 15:08:54,349 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:08:54,349 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:08:54,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2024-11-13 15:08:54,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:08:54,550 INFO L396 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:08:54,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:08:54,550 INFO L85 PathProgramCache]: Analyzing trace with hash -698592875, now seen corresponding path program 18 times [2024-11-13 15:08:54,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:08:54,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022002471] [2024-11-13 15:08:54,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:08:54,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:08:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:08:56,981 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 287 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:08:56,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:08:56,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022002471] [2024-11-13 15:08:56,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022002471] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:08:56,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294082585] [2024-11-13 15:08:56,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 15:08:56,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:08:56,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:08:56,983 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:08:56,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2024-11-13 15:08:58,602 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2024-11-13 15:08:58,602 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:08:58,608 INFO L255 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 180 conjuncts are in the unsatisfiable core [2024-11-13 15:08:58,614 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:08:59,719 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 15:09:01,159 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 17 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:01,159 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:09:01,232 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 18 treesize of output 16 [2024-11-13 15:09:01,234 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 20 treesize of output 16 [2024-11-13 15:09:01,505 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 17 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:01,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294082585] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:09:01,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:09:01,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 40, 40] total 79 [2024-11-13 15:09:01,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526104426] [2024-11-13 15:09:01,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:09:01,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2024-11-13 15:09:01,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:09:01,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2024-11-13 15:09:01,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=5892, Unknown=0, NotChecked=0, Total=6162 [2024-11-13 15:09:01,507 INFO L87 Difference]: Start difference. First operand 1728 states and 1877 transitions. Second operand has 79 states, 79 states have (on average 2.430379746835443) internal successors, (192), 79 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:11,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:09:11,527 INFO L93 Difference]: Finished difference Result 2427 states and 2604 transitions. [2024-11-13 15:09:11,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2024-11-13 15:09:11,528 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.430379746835443) internal successors, (192), 79 states have internal predecessors, (192), 0 states have call successors, (0), 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 96 [2024-11-13 15:09:11,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:09:11,529 INFO L225 Difference]: With dead ends: 2427 [2024-11-13 15:09:11,529 INFO L226 Difference]: Without dead ends: 2290 [2024-11-13 15:09:11,530 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4322 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=911, Invalid=21439, Unknown=0, NotChecked=0, Total=22350 [2024-11-13 15:09:11,530 INFO L432 NwaCegarLoop]: 118 mSDtfsCounter, 246 mSDsluCounter, 6314 mSDsCounter, 0 mSdLazyCounter, 9781 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 6432 SdHoareTripleChecker+Invalid, 9848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 9781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:09:11,530 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 6432 Invalid, 9848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 9781 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2024-11-13 15:09:11,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2024-11-13 15:09:11,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1869. [2024-11-13 15:09:11,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1866 states have (on average 1.0884244372990353) internal successors, (2031), 1868 states have internal predecessors, (2031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:11,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2031 transitions. [2024-11-13 15:09:11,548 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2031 transitions. Word has length 96 [2024-11-13 15:09:11,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:09:11,549 INFO L471 AbstractCegarLoop]: Abstraction has 1869 states and 2031 transitions. [2024-11-13 15:09:11,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.430379746835443) internal successors, (192), 79 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:11,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2031 transitions. [2024-11-13 15:09:11,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-13 15:09:11,551 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:09:11,551 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 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 15:09:11,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2024-11-13 15:09:11,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:09:11,751 INFO L396 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:09:11,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:09:11,752 INFO L85 PathProgramCache]: Analyzing trace with hash 980867797, now seen corresponding path program 20 times [2024-11-13 15:09:11,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:09:11,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544828040] [2024-11-13 15:09:11,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:11,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:09:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:13,779 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 210 proven. 291 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:09:13,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:09:13,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544828040] [2024-11-13 15:09:13,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544828040] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:09:13,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665623067] [2024-11-13 15:09:13,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:09:13,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:09:13,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:09:13,784 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:09:13,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2024-11-13 15:09:14,340 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:09:14,341 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:09:14,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 186 conjuncts are in the unsatisfiable core [2024-11-13 15:09:14,350 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:09:14,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:09:14,444 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 15:09:14,450 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 15:09:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 501 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:09:17,891 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:09:22,496 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:09:22,697 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 501 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:09:22,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665623067] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:09:22,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:09:22,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 38, 39] total 110 [2024-11-13 15:09:22,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034652923] [2024-11-13 15:09:22,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:09:22,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2024-11-13 15:09:22,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:09:22,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2024-11-13 15:09:22,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1152, Invalid=11058, Unknown=0, NotChecked=0, Total=12210 [2024-11-13 15:09:22,699 INFO L87 Difference]: Start difference. First operand 1869 states and 2031 transitions. Second operand has 111 states, 110 states have (on average 2.6545454545454548) internal successors, (292), 111 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:32,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:09:32,077 INFO L93 Difference]: Finished difference Result 3193 states and 3382 transitions. [2024-11-13 15:09:32,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2024-11-13 15:09:32,078 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 110 states have (on average 2.6545454545454548) internal successors, (292), 111 states have internal predecessors, (292), 0 states have call successors, (0), 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 15:09:32,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:09:32,079 INFO L225 Difference]: With dead ends: 3193 [2024-11-13 15:09:32,079 INFO L226 Difference]: Without dead ends: 3041 [2024-11-13 15:09:32,080 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7332 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=2264, Invalid=22228, Unknown=0, NotChecked=0, Total=24492 [2024-11-13 15:09:32,080 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 671 mSDsluCounter, 3342 mSDsCounter, 0 mSdLazyCounter, 8437 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 3427 SdHoareTripleChecker+Invalid, 8662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 8437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2024-11-13 15:09:32,080 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 3427 Invalid, 8662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 8437 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2024-11-13 15:09:32,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2024-11-13 15:09:32,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 1895. [2024-11-13 15:09:32,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1895 states, 1892 states have (on average 1.087737843551797) internal successors, (2058), 1894 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:32,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 2058 transitions. [2024-11-13 15:09:32,096 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 2058 transitions. Word has length 98 [2024-11-13 15:09:32,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:09:32,096 INFO L471 AbstractCegarLoop]: Abstraction has 1895 states and 2058 transitions. [2024-11-13 15:09:32,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 110 states have (on average 2.6545454545454548) internal successors, (292), 111 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:32,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 2058 transitions. [2024-11-13 15:09:32,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-13 15:09:32,097 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:09:32,097 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:09:32,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2024-11-13 15:09:32,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:09:32,298 INFO L396 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:09:32,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:09:32,298 INFO L85 PathProgramCache]: Analyzing trace with hash 563888061, now seen corresponding path program 15 times [2024-11-13 15:09:32,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:09:32,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259586448] [2024-11-13 15:09:32,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:32,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:09:32,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:33,972 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 330 proven. 384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:33,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:09:33,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259586448] [2024-11-13 15:09:33,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259586448] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:09:33,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140538163] [2024-11-13 15:09:33,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 15:09:33,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:09:33,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:09:33,974 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:09:33,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2024-11-13 15:09:34,838 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2024-11-13 15:09:34,838 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:09:34,843 INFO L255 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 136 conjuncts are in the unsatisfiable core [2024-11-13 15:09:34,848 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:09:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 376 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:36,553 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:09:37,964 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 8 treesize of output 6 [2024-11-13 15:09:38,623 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 376 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:38,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140538163] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:09:38,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:09:38,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39, 39] total 96 [2024-11-13 15:09:38,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47612176] [2024-11-13 15:09:38,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:09:38,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-11-13 15:09:38,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:09:38,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-11-13 15:09:38,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1411, Invalid=7901, Unknown=0, NotChecked=0, Total=9312 [2024-11-13 15:09:38,627 INFO L87 Difference]: Start difference. First operand 1895 states and 2058 transitions. Second operand has 97 states, 96 states have (on average 2.40625) internal successors, (231), 97 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:40,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:09:40,890 INFO L93 Difference]: Finished difference Result 2377 states and 2554 transitions. [2024-11-13 15:09:40,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-13 15:09:40,891 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 96 states have (on average 2.40625) internal successors, (231), 97 states have internal predecessors, (231), 0 states have call successors, (0), 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 99 [2024-11-13 15:09:40,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:09:40,892 INFO L225 Difference]: With dead ends: 2377 [2024-11-13 15:09:40,892 INFO L226 Difference]: Without dead ends: 2347 [2024-11-13 15:09:40,892 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 121 SyntacticMatches, 18 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4837 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1448, Invalid=8058, Unknown=0, NotChecked=0, Total=9506 [2024-11-13 15:09:40,893 INFO L432 NwaCegarLoop]: 101 mSDtfsCounter, 613 mSDsluCounter, 2146 mSDsCounter, 0 mSdLazyCounter, 3810 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 2247 SdHoareTripleChecker+Invalid, 3913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 3810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:09:40,893 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 2247 Invalid, 3913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 3810 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-13 15:09:40,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2024-11-13 15:09:40,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 1852. [2024-11-13 15:09:40,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1849 states have (on average 1.089778258518118) internal successors, (2015), 1851 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:40,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 2015 transitions. [2024-11-13 15:09:40,904 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 2015 transitions. Word has length 99 [2024-11-13 15:09:40,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:09:40,904 INFO L471 AbstractCegarLoop]: Abstraction has 1852 states and 2015 transitions. [2024-11-13 15:09:40,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 96 states have (on average 2.40625) internal successors, (231), 97 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:40,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 2015 transitions. [2024-11-13 15:09:40,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-13 15:09:40,905 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:09:40,905 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:09:40,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2024-11-13 15:09:41,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2024-11-13 15:09:41,106 INFO L396 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:09:41,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:09:41,106 INFO L85 PathProgramCache]: Analyzing trace with hash 723040373, now seen corresponding path program 2 times [2024-11-13 15:09:41,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:09:41,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897657587] [2024-11-13 15:09:41,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:41,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:09:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:42,011 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 169 proven. 66 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-13 15:09:42,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:09:42,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897657587] [2024-11-13 15:09:42,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897657587] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:09:42,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464591282] [2024-11-13 15:09:42,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:09:42,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:09:42,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:09:42,013 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:09:42,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2024-11-13 15:09:42,576 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:09:42,576 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:09:42,579 INFO L255 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-13 15:09:42,581 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:09:42,926 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 15:09:43,712 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:09:43,714 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:09:43,715 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 17 treesize of output 10 [2024-11-13 15:09:43,796 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 96 proven. 125 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-13 15:09:43,796 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:09:44,375 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 15 treesize of output 13 [2024-11-13 15:09:44,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-13 15:09:45,083 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 96 proven. 125 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-13 15:09:45,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464591282] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:09:45,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:09:45,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 60 [2024-11-13 15:09:45,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163752453] [2024-11-13 15:09:45,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:09:45,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-13 15:09:45,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:09:45,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-13 15:09:45,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=3335, Unknown=0, NotChecked=0, Total=3540 [2024-11-13 15:09:45,085 INFO L87 Difference]: Start difference. First operand 1852 states and 2015 transitions. Second operand has 60 states, 60 states have (on average 3.5166666666666666) internal successors, (211), 60 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:47,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:09:47,992 INFO L93 Difference]: Finished difference Result 3504 states and 3738 transitions. [2024-11-13 15:09:47,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-13 15:09:47,992 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.5166666666666666) internal successors, (211), 60 states have internal predecessors, (211), 0 states have call successors, (0), 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 15:09:47,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:09:47,994 INFO L225 Difference]: With dead ends: 3504 [2024-11-13 15:09:47,994 INFO L226 Difference]: Without dead ends: 2572 [2024-11-13 15:09:47,995 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2020 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=527, Invalid=8029, Unknown=0, NotChecked=0, Total=8556 [2024-11-13 15:09:47,995 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 112 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 2235 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 2254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:09:47,995 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 1014 Invalid, 2254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2235 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-13 15:09:47,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2024-11-13 15:09:48,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 2167. [2024-11-13 15:09:48,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2164 states have (on average 1.088724584103512) internal successors, (2356), 2166 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:48,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 2356 transitions. [2024-11-13 15:09:48,009 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 2356 transitions. Word has length 100 [2024-11-13 15:09:48,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:09:48,010 INFO L471 AbstractCegarLoop]: Abstraction has 2167 states and 2356 transitions. [2024-11-13 15:09:48,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.5166666666666666) internal successors, (211), 60 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:48,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 2356 transitions. [2024-11-13 15:09:48,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-13 15:09:48,011 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:09:48,011 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:09:48,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2024-11-13 15:09:48,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2024-11-13 15:09:48,212 INFO L396 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:09:48,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:09:48,212 INFO L85 PathProgramCache]: Analyzing trace with hash -870523308, now seen corresponding path program 19 times [2024-11-13 15:09:48,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:09:48,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426245056] [2024-11-13 15:09:48,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:48,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:09:48,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 330 proven. 419 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:50,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:09:50,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426245056] [2024-11-13 15:09:50,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426245056] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:09:50,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227349891] [2024-11-13 15:09:50,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 15:09:50,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:09:50,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:09:50,651 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:09:50,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2024-11-13 15:09:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:51,236 INFO L255 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 190 conjuncts are in the unsatisfiable core [2024-11-13 15:09:51,241 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:09:52,410 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 15:09:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 18 proven. 731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:53,932 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:09:53,999 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 18 treesize of output 16 [2024-11-13 15:09:54,001 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 15:09:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 18 proven. 731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:54,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227349891] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:09:54,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:09:54,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 42, 42] total 83 [2024-11-13 15:09:54,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872206511] [2024-11-13 15:09:54,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:09:54,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-13 15:09:54,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:09:54,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-13 15:09:54,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=6514, Unknown=0, NotChecked=0, Total=6806 [2024-11-13 15:09:54,275 INFO L87 Difference]: Start difference. First operand 2167 states and 2356 transitions. Second operand has 83 states, 83 states have (on average 2.433734939759036) internal successors, (202), 83 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 15:10:05,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:10:05,762 INFO L93 Difference]: Finished difference Result 2970 states and 3193 transitions. [2024-11-13 15:10:05,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2024-11-13 15:10:05,762 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.433734939759036) internal successors, (202), 83 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 101 [2024-11-13 15:10:05,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:10:05,764 INFO L225 Difference]: With dead ends: 2970 [2024-11-13 15:10:05,764 INFO L226 Difference]: Without dead ends: 2827 [2024-11-13 15:10:05,765 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4803 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=993, Invalid=24129, Unknown=0, NotChecked=0, Total=25122 [2024-11-13 15:10:05,766 INFO L432 NwaCegarLoop]: 123 mSDtfsCounter, 249 mSDsluCounter, 6968 mSDsCounter, 0 mSdLazyCounter, 10704 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 7091 SdHoareTripleChecker+Invalid, 10775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 10704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2024-11-13 15:10:05,766 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 7091 Invalid, 10775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 10704 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2024-11-13 15:10:05,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2827 states. [2024-11-13 15:10:05,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2827 to 2320. [2024-11-13 15:10:05,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2317 states have (on average 1.0889080707811825) internal successors, (2523), 2319 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:10:05,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 2523 transitions. [2024-11-13 15:10:05,781 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 2523 transitions. Word has length 101 [2024-11-13 15:10:05,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:10:05,781 INFO L471 AbstractCegarLoop]: Abstraction has 2320 states and 2523 transitions. [2024-11-13 15:10:05,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.433734939759036) internal successors, (202), 83 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 15:10:05,781 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 2523 transitions. [2024-11-13 15:10:05,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-13 15:10:05,783 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:10:05,783 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:10:05,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2024-11-13 15:10:05,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2024-11-13 15:10:05,983 INFO L396 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:10:05,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:10:05,984 INFO L85 PathProgramCache]: Analyzing trace with hash 956958210, now seen corresponding path program 21 times [2024-11-13 15:10:05,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:10:05,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559017367] [2024-11-13 15:10:05,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:10:05,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:10:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:10:09,238 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:10:09,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:10:09,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559017367] [2024-11-13 15:10:09,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559017367] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:10:09,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844910185] [2024-11-13 15:10:09,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 15:10:09,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:10:09,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:10:09,240 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:10:09,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2024-11-13 15:10:10,747 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-13 15:10:10,747 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:10:10,754 INFO L255 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 171 conjuncts are in the unsatisfiable core [2024-11-13 15:10:10,759 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:10:10,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:10:10,892 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 15:10:10,898 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 15:10:15,280 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:10:15,280 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:10:20,729 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:10:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:10:21,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844910185] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:10:21,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:10:21,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 38, 39] total 111 [2024-11-13 15:10:21,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180095974] [2024-11-13 15:10:21,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:10:21,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2024-11-13 15:10:21,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:10:21,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2024-11-13 15:10:21,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=11484, Unknown=0, NotChecked=0, Total=12432 [2024-11-13 15:10:21,014 INFO L87 Difference]: Start difference. First operand 2320 states and 2523 transitions. Second operand has 112 states, 111 states have (on average 2.5495495495495497) internal successors, (283), 112 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:10:33,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:10:33,699 INFO L93 Difference]: Finished difference Result 3301 states and 3509 transitions. [2024-11-13 15:10:33,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2024-11-13 15:10:33,699 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 111 states have (on average 2.5495495495495497) internal successors, (283), 112 states have internal predecessors, (283), 0 states have call successors, (0), 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 15:10:33,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:10:33,700 INFO L225 Difference]: With dead ends: 3301 [2024-11-13 15:10:33,701 INFO L226 Difference]: Without dead ends: 3131 [2024-11-13 15:10:33,702 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7637 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=2606, Invalid=27496, Unknown=0, NotChecked=0, Total=30102 [2024-11-13 15:10:33,702 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 392 mSDsluCounter, 2165 mSDsCounter, 0 mSdLazyCounter, 6985 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 2218 SdHoareTripleChecker+Invalid, 7131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 6985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:10:33,702 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 2218 Invalid, 7131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 6985 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2024-11-13 15:10:33,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2024-11-13 15:10:33,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 2284. [2024-11-13 15:10:33,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 2281 states have (on average 1.0911880754055239) internal successors, (2489), 2283 states have internal predecessors, (2489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:10:33,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 2489 transitions. [2024-11-13 15:10:33,716 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 2489 transitions. Word has length 101 [2024-11-13 15:10:33,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:10:33,717 INFO L471 AbstractCegarLoop]: Abstraction has 2284 states and 2489 transitions. [2024-11-13 15:10:33,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 111 states have (on average 2.5495495495495497) internal successors, (283), 112 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:10:33,717 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 2489 transitions. [2024-11-13 15:10:33,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-13 15:10:33,718 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:10:33,718 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:10:33,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2024-11-13 15:10:33,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2024-11-13 15:10:33,918 INFO L396 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:10:33,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:10:33,919 INFO L85 PathProgramCache]: Analyzing trace with hash 526904568, now seen corresponding path program 22 times [2024-11-13 15:10:33,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:10:33,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926092356] [2024-11-13 15:10:33,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:10:33,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:10:33,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:10:36,626 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 181 proven. 262 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:10:36,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:10:36,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926092356] [2024-11-13 15:10:36,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926092356] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:10:36,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985472577] [2024-11-13 15:10:36,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 15:10:36,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:10:36,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:10:36,628 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:10:36,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2024-11-13 15:10:37,790 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 15:10:37,790 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:10:37,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 165 conjuncts are in the unsatisfiable core [2024-11-13 15:10:37,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:10:37,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:10:37,911 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 15:10:37,914 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 15:10:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 199 proven. 244 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:10:42,273 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:10:46,378 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:10:46,624 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 247 proven. 196 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:10:46,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985472577] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:10:46,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:10:46,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 36, 36] total 108 [2024-11-13 15:10:46,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600878040] [2024-11-13 15:10:46,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:10:46,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2024-11-13 15:10:46,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:10:46,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2024-11-13 15:10:46,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=968, Invalid=10804, Unknown=0, NotChecked=0, Total=11772 [2024-11-13 15:10:46,626 INFO L87 Difference]: Start difference. First operand 2284 states and 2489 transitions. Second operand has 109 states, 108 states have (on average 2.7314814814814814) internal successors, (295), 109 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:10:54,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:10:54,771 INFO L93 Difference]: Finished difference Result 3453 states and 3670 transitions. [2024-11-13 15:10:54,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-11-13 15:10:54,772 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 108 states have (on average 2.7314814814814814) internal successors, (295), 109 states have internal predecessors, (295), 0 states have call successors, (0), 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 102 [2024-11-13 15:10:54,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:10:54,773 INFO L225 Difference]: With dead ends: 3453 [2024-11-13 15:10:54,773 INFO L226 Difference]: Without dead ends: 3107 [2024-11-13 15:10:54,774 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5339 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=1870, Invalid=17870, Unknown=0, NotChecked=0, Total=19740 [2024-11-13 15:10:54,774 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 484 mSDsluCounter, 2013 mSDsCounter, 0 mSdLazyCounter, 6481 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 2067 SdHoareTripleChecker+Invalid, 6543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 6481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-11-13 15:10:54,774 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 2067 Invalid, 6543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 6481 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2024-11-13 15:10:54,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2024-11-13 15:10:54,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 2274. [2024-11-13 15:10:54,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2274 states, 2271 states have (on average 1.087626596213122) internal successors, (2470), 2273 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:10:54,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2274 states to 2274 states and 2470 transitions. [2024-11-13 15:10:54,789 INFO L78 Accepts]: Start accepts. Automaton has 2274 states and 2470 transitions. Word has length 102 [2024-11-13 15:10:54,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:10:54,789 INFO L471 AbstractCegarLoop]: Abstraction has 2274 states and 2470 transitions. [2024-11-13 15:10:54,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 108 states have (on average 2.7314814814814814) internal successors, (295), 109 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:10:54,789 INFO L276 IsEmpty]: Start isEmpty. Operand 2274 states and 2470 transitions. [2024-11-13 15:10:54,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-13 15:10:54,790 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:10:54,791 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 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 15:10:54,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2024-11-13 15:10:54,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2024-11-13 15:10:54,991 INFO L396 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:10:54,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:10:54,991 INFO L85 PathProgramCache]: Analyzing trace with hash -968133246, now seen corresponding path program 23 times [2024-11-13 15:10:54,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:10:54,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679312443] [2024-11-13 15:10:54,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:10:54,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:10:55,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:10:57,548 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 247 proven. 327 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:10:57,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:10:57,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679312443] [2024-11-13 15:10:57,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679312443] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:10:57,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642739829] [2024-11-13 15:10:57,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 15:10:57,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:10:57,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:10:57,551 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:10:57,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2024-11-13 15:10:58,301 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2024-11-13 15:10:58,301 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:10:58,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 208 conjuncts are in the unsatisfiable core [2024-11-13 15:10:58,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:10:58,451 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2024-11-13 15:10:58,451 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 1 case distinctions, treesize of input 13 treesize of output 11 [2024-11-13 15:10:58,465 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 15:11:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:11:03,522 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:11:08,617 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:11:08,921 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:11:08,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642739829] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:11:08,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:11:08,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 41, 41] total 117 [2024-11-13 15:11:08,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826163571] [2024-11-13 15:11:08,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:11:08,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2024-11-13 15:11:08,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:11:08,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2024-11-13 15:11:08,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=12480, Unknown=0, NotChecked=0, Total=13806 [2024-11-13 15:11:08,924 INFO L87 Difference]: Start difference. First operand 2274 states and 2470 transitions. Second operand has 118 states, 117 states have (on average 2.623931623931624) internal successors, (307), 118 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:11:21,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:11:21,601 INFO L93 Difference]: Finished difference Result 3672 states and 3890 transitions. [2024-11-13 15:11:21,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2024-11-13 15:11:21,602 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 117 states have (on average 2.623931623931624) internal successors, (307), 118 states have internal predecessors, (307), 0 states have call successors, (0), 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 103 [2024-11-13 15:11:21,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:11:21,603 INFO L225 Difference]: With dead ends: 3672 [2024-11-13 15:11:21,603 INFO L226 Difference]: Without dead ends: 3528 [2024-11-13 15:11:21,604 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8871 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=3212, Invalid=25858, Unknown=0, NotChecked=0, Total=29070 [2024-11-13 15:11:21,604 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 633 mSDsluCounter, 2882 mSDsCounter, 0 mSdLazyCounter, 8890 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 2959 SdHoareTripleChecker+Invalid, 9075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 8890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:11:21,604 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 2959 Invalid, 9075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 8890 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2024-11-13 15:11:21,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3528 states. [2024-11-13 15:11:21,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3528 to 2274. [2024-11-13 15:11:21,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2274 states, 2271 states have (on average 1.087626596213122) internal successors, (2470), 2273 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:11:21,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2274 states to 2274 states and 2470 transitions. [2024-11-13 15:11:21,620 INFO L78 Accepts]: Start accepts. Automaton has 2274 states and 2470 transitions. Word has length 103 [2024-11-13 15:11:21,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:11:21,620 INFO L471 AbstractCegarLoop]: Abstraction has 2274 states and 2470 transitions. [2024-11-13 15:11:21,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 117 states have (on average 2.623931623931624) internal successors, (307), 118 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:11:21,620 INFO L276 IsEmpty]: Start isEmpty. Operand 2274 states and 2470 transitions. [2024-11-13 15:11:21,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-13 15:11:21,621 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:11:21,622 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:11:21,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2024-11-13 15:11:21,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2024-11-13 15:11:21,822 INFO L396 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:11:21,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:11:21,822 INFO L85 PathProgramCache]: Analyzing trace with hash 701800343, now seen corresponding path program 3 times [2024-11-13 15:11:21,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:11:21,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854047822] [2024-11-13 15:11:21,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:11:21,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:11:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:11:23,027 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 204 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:11:23,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:11:23,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854047822] [2024-11-13 15:11:23,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854047822] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:11:23,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264786559] [2024-11-13 15:11:23,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 15:11:23,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:11:23,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:11:23,030 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:11:23,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2024-11-13 15:11:24,423 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-13 15:11:24,423 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:11:24,428 INFO L255 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-11-13 15:11:24,431 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:11:25,028 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 15:11:25,751 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 70 proven. 227 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:11:25,751 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:11:26,265 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 15:11:26,266 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 15:11:26,746 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 70 proven. 177 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-13 15:11:26,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264786559] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:11:26,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:11:26,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 22] total 73 [2024-11-13 15:11:26,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470778576] [2024-11-13 15:11:26,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:11:26,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-13 15:11:26,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:11:26,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-13 15:11:26,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=4979, Unknown=0, NotChecked=0, Total=5256 [2024-11-13 15:11:26,749 INFO L87 Difference]: Start difference. First operand 2274 states and 2470 transitions. Second operand has 73 states, 73 states have (on average 3.6575342465753424) internal successors, (267), 73 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:11:30,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:11:30,282 INFO L93 Difference]: Finished difference Result 4004 states and 4273 transitions. [2024-11-13 15:11:30,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-13 15:11:30,283 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.6575342465753424) internal successors, (267), 73 states have internal predecessors, (267), 0 states have call successors, (0), 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 103 [2024-11-13 15:11:30,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:11:30,284 INFO L225 Difference]: With dead ends: 4004 [2024-11-13 15:11:30,284 INFO L226 Difference]: Without dead ends: 2889 [2024-11-13 15:11:30,285 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3258 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=684, Invalid=12198, Unknown=0, NotChecked=0, Total=12882 [2024-11-13 15:11:30,286 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 80 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 2758 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1357 SdHoareTripleChecker+Invalid, 2774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-13 15:11:30,286 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 1357 Invalid, 2774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2758 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-13 15:11:30,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2889 states. [2024-11-13 15:11:30,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2889 to 2625. [2024-11-13 15:11:30,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2625 states, 2622 states have (on average 1.0865751334858886) internal successors, (2849), 2624 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:11:30,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2625 states to 2625 states and 2849 transitions. [2024-11-13 15:11:30,325 INFO L78 Accepts]: Start accepts. Automaton has 2625 states and 2849 transitions. Word has length 103 [2024-11-13 15:11:30,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:11:30,325 INFO L471 AbstractCegarLoop]: Abstraction has 2625 states and 2849 transitions. [2024-11-13 15:11:30,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.6575342465753424) internal successors, (267), 73 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:11:30,325 INFO L276 IsEmpty]: Start isEmpty. Operand 2625 states and 2849 transitions. [2024-11-13 15:11:30,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-13 15:11:30,327 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:11:30,327 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:11:30,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2024-11-13 15:11:30,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2024-11-13 15:11:30,529 INFO L396 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:11:30,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:11:30,530 INFO L85 PathProgramCache]: Analyzing trace with hash 367233324, now seen corresponding path program 16 times [2024-11-13 15:11:30,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:11:30,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148388243] [2024-11-13 15:11:30,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:11:30,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:11:30,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:11:32,607 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 376 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:11:32,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:11:32,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148388243] [2024-11-13 15:11:32,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148388243] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:11:32,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081738] [2024-11-13 15:11:32,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 15:11:32,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:11:32,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:11:32,610 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:11:32,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2024-11-13 15:11:34,276 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 15:11:34,277 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:11:34,283 INFO L255 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 181 conjuncts are in the unsatisfiable core [2024-11-13 15:11:34,289 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:11:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 425 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:11:35,633 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:11:37,046 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 23 treesize of output 19 [2024-11-13 15:11:38,644 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 425 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:11:38,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081738] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:11:38,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:11:38,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 100 [2024-11-13 15:11:38,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651816611] [2024-11-13 15:11:38,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:11:38,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2024-11-13 15:11:38,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:11:38,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2024-11-13 15:11:38,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1370, Invalid=8730, Unknown=0, NotChecked=0, Total=10100 [2024-11-13 15:11:38,647 INFO L87 Difference]: Start difference. First operand 2625 states and 2849 transitions. Second operand has 101 states, 100 states have (on average 2.67) internal successors, (267), 101 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:11:43,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:11:43,464 INFO L93 Difference]: Finished difference Result 3251 states and 3495 transitions. [2024-11-13 15:11:43,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-13 15:11:43,464 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 100 states have (on average 2.67) internal successors, (267), 101 states have internal predecessors, (267), 0 states have call successors, (0), 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 15:11:43,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:11:43,467 INFO L225 Difference]: With dead ends: 3251 [2024-11-13 15:11:43,467 INFO L226 Difference]: Without dead ends: 3209 [2024-11-13 15:11:43,468 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3892 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1428, Invalid=8874, Unknown=0, NotChecked=0, Total=10302 [2024-11-13 15:11:43,468 INFO L432 NwaCegarLoop]: 104 mSDtfsCounter, 404 mSDsluCounter, 3222 mSDsCounter, 0 mSdLazyCounter, 6076 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 3326 SdHoareTripleChecker+Invalid, 6154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 6076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:11:43,468 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 3326 Invalid, 6154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 6076 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2024-11-13 15:11:43,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3209 states. [2024-11-13 15:11:43,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3209 to 2589. [2024-11-13 15:11:43,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2589 states, 2586 states have (on average 1.088167053364269) internal successors, (2814), 2588 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:11:43,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2589 states to 2589 states and 2814 transitions. [2024-11-13 15:11:43,496 INFO L78 Accepts]: Start accepts. Automaton has 2589 states and 2814 transitions. Word has length 104 [2024-11-13 15:11:43,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:11:43,497 INFO L471 AbstractCegarLoop]: Abstraction has 2589 states and 2814 transitions. [2024-11-13 15:11:43,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 100 states have (on average 2.67) internal successors, (267), 101 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:11:43,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2589 states and 2814 transitions. [2024-11-13 15:11:43,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-13 15:11:43,500 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:11:43,500 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 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] [2024-11-13 15:11:43,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2024-11-13 15:11:43,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2024-11-13 15:11:43,701 INFO L396 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 15:11:43,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:11:43,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1192913640, now seen corresponding path program 12 times [2024-11-13 15:11:43,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:11:43,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277737218] [2024-11-13 15:11:43,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:11:43,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:11:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:11:46,910 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 14 proven. 355 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:11:46,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:11:46,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277737218] [2024-11-13 15:11:46,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277737218] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:11:46,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205358431] [2024-11-13 15:11:46,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 15:11:46,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:11:46,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:11:46,913 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:11:46,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be3862ad-0cf8-490b-8999-45f82948e91f/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process