./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-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_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/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_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/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_44f4ea13-4392-4198-97b2-f78b5ec2cce0/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 8688e0efa9d37c2205606fbd307da42d83b0f0e2936dd15336b8b67e136d86b0 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 14:09:19,733 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 14:09:19,834 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-13 14:09:19,847 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 14:09:19,847 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 14:09:19,895 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 14:09:19,895 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 14:09:19,896 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 14:09:19,896 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 14:09:19,896 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 14:09:19,899 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 14:09:19,900 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 14:09:19,901 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 14:09:19,901 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 14:09:19,902 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 14:09:19,902 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 14:09:19,903 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 14:09:19,903 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 14:09:19,903 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 14:09:19,903 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 14:09:19,903 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 14:09:19,903 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 14:09:19,904 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 14:09:19,904 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 14:09:19,904 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 14:09:19,904 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 14:09:19,905 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 14:09:19,905 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 14:09:19,905 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 14:09:19,905 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 14:09:19,905 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 14:09:19,905 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 14:09:19,906 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 14:09:19,906 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:09:19,907 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 14:09:19,907 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 14:09:19,908 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 14:09:19,908 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 14:09:19,908 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 14:09:19,908 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 14:09:19,909 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 14:09:19,909 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 14:09:19,909 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_44f4ea13-4392-4198-97b2-f78b5ec2cce0/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 -> 8688e0efa9d37c2205606fbd307da42d83b0f0e2936dd15336b8b67e136d86b0 [2024-11-13 14:09:20,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 14:09:20,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 14:09:20,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 14:09:20,406 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 14:09:20,407 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 14:09:20,410 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i Unable to find full path for "g++" [2024-11-13 14:09:22,987 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 14:09:23,350 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 14:09:23,351 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i [2024-11-13 14:09:23,366 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/data/4b2858e69/80cf26a52b54461e925586d6576a307f/FLAG050f5c976 [2024-11-13 14:09:23,562 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/data/4b2858e69/80cf26a52b54461e925586d6576a307f [2024-11-13 14:09:23,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 14:09:23,566 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 14:09:23,568 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 14:09:23,568 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 14:09:23,574 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 14:09:23,575 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:09:23" (1/1) ... [2024-11-13 14:09:23,576 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@334efdb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:09:23, skipping insertion in model container [2024-11-13 14:09:23,576 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:09:23" (1/1) ... [2024-11-13 14:09:23,615 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 14:09:24,099 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 14:09:24,100 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 14:09:24,108 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:09:24,126 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 14:09:24,214 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:09:24,258 INFO L204 MainTranslator]: Completed translation [2024-11-13 14:09:24,259 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:09:24 WrapperNode [2024-11-13 14:09:24,259 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 14:09:24,262 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 14:09:24,262 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 14:09:24,262 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 14:09:24,272 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:09:24" (1/1) ... [2024-11-13 14:09:24,292 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:09:24" (1/1) ... [2024-11-13 14:09:24,329 INFO L138 Inliner]: procedures = 117, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2024-11-13 14:09:24,332 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 14:09:24,333 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 14:09:24,333 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 14:09:24,334 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 14:09:24,347 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:09:24" (1/1) ... [2024-11-13 14:09:24,347 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:09:24" (1/1) ... [2024-11-13 14:09:24,350 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:09:24" (1/1) ... [2024-11-13 14:09:24,379 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [3, 4]. 57 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 5 writes are split as follows [2, 3]. [2024-11-13 14:09:24,380 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:09:24" (1/1) ... [2024-11-13 14:09:24,380 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:09:24" (1/1) ... [2024-11-13 14:09:24,397 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:09:24" (1/1) ... [2024-11-13 14:09:24,405 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:09:24" (1/1) ... [2024-11-13 14:09:24,410 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:09:24" (1/1) ... [2024-11-13 14:09:24,411 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:09:24" (1/1) ... [2024-11-13 14:09:24,414 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 14:09:24,418 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 14:09:24,419 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 14:09:24,419 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 14:09:24,420 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:09:24" (1/1) ... [2024-11-13 14:09:24,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:09:24,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:09:24,476 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 14:09:24,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 14:09:24,523 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 14:09:24,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 14:09:24,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 14:09:24,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 14:09:24,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 14:09:24,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 14:09:24,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 14:09:24,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 14:09:24,682 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 14:09:24,684 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 14:09:24,986 INFO L? ?]: Removed 57 outVars from TransFormulas that were not future-live. [2024-11-13 14:09:24,986 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 14:09:25,001 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 14:09:25,001 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-13 14:09:25,002 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:09:25 BoogieIcfgContainer [2024-11-13 14:09:25,002 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 14:09:25,006 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 14:09:25,006 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 14:09:25,014 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 14:09:25,014 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:09:23" (1/3) ... [2024-11-13 14:09:25,015 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bb9bd8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:09:25, skipping insertion in model container [2024-11-13 14:09:25,015 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:09:24" (2/3) ... [2024-11-13 14:09:25,015 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bb9bd8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:09:25, skipping insertion in model container [2024-11-13 14:09:25,016 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:09:25" (3/3) ... [2024-11-13 14:09:25,017 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcat-alloca-2.i [2024-11-13 14:09:25,042 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 14:09:25,045 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG openbsd_cstrcat-alloca-2.i that has 1 procedures, 43 locations, 1 initial locations, 4 loop locations, and 15 error locations. [2024-11-13 14:09:25,095 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 14:09:25,118 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;@6176b80, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 14:09:25,119 INFO L334 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2024-11-13 14:09:25,125 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 27 states have (on average 2.0) internal successors, (54), 42 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:25,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-13 14:09:25,137 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:25,138 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:09:25,139 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:25,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:25,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031093, now seen corresponding path program 1 times [2024-11-13 14:09:25,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:25,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425417779] [2024-11-13 14:09:25,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:25,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:25,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:25,609 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 14:09:25,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:25,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425417779] [2024-11-13 14:09:25,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425417779] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:09:25,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:09:25,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:09:25,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51017450] [2024-11-13 14:09:25,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:09:25,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:09:25,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:25,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:09:25,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:09:25,659 INFO L87 Difference]: Start difference. First operand has 43 states, 27 states have (on average 2.0) internal successors, (54), 42 states have internal predecessors, (54), 0 states have call successors, (0), 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 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:25,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:25,887 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2024-11-13 14:09:25,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:09:25,890 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-13 14:09:25,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:25,900 INFO L225 Difference]: With dead ends: 61 [2024-11-13 14:09:25,901 INFO L226 Difference]: Without dead ends: 59 [2024-11-13 14:09:25,905 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 14:09:25,912 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 23 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 154 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 14:09:25,913 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 154 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:09:25,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-13 14:09:25,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 44. [2024-11-13 14:09:25,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 43 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:25,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2024-11-13 14:09:25,965 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 7 [2024-11-13 14:09:25,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:25,967 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2024-11-13 14:09:25,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:25,969 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2024-11-13 14:09:25,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-13 14:09:25,971 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:25,971 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:09:25,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 14:09:25,972 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:25,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:25,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033015, now seen corresponding path program 1 times [2024-11-13 14:09:25,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:25,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863668711] [2024-11-13 14:09:25,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:25,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:26,071 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 14:09:26,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:26,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863668711] [2024-11-13 14:09:26,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863668711] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:09:26,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:09:26,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 14:09:26,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225394829] [2024-11-13 14:09:26,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:09:26,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:09:26,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:26,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:09:26,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 14:09:26,078 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:26,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:26,162 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2024-11-13 14:09:26,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:09:26,163 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 14:09:26,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:26,163 INFO L225 Difference]: With dead ends: 45 [2024-11-13 14:09:26,163 INFO L226 Difference]: Without dead ends: 44 [2024-11-13 14:09:26,164 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 14:09:26,165 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 3 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:26,169 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 69 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:09:26,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-13 14:09:26,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2024-11-13 14:09:26,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:26,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2024-11-13 14:09:26,180 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 7 [2024-11-13 14:09:26,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:26,180 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2024-11-13 14:09:26,181 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 14:09:26,181 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2024-11-13 14:09:26,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-13 14:09:26,182 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:26,183 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:09:26,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 14:09:26,183 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:26,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:26,186 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2024-11-13 14:09:26,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:26,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147990816] [2024-11-13 14:09:26,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:26,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:26,362 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 14:09:26,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:26,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147990816] [2024-11-13 14:09:26,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147990816] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:09:26,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:09:26,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 14:09:26,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335832160] [2024-11-13 14:09:26,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:09:26,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:09:26,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:26,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:09:26,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:09:26,366 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 14:09:26,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:26,421 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2024-11-13 14:09:26,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:09:26,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 14:09:26,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:26,428 INFO L225 Difference]: With dead ends: 54 [2024-11-13 14:09:26,431 INFO L226 Difference]: Without dead ends: 54 [2024-11-13 14:09:26,431 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 14:09:26,432 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 12 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:26,433 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 94 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:09:26,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-13 14:09:26,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2024-11-13 14:09:26,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:26,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2024-11-13 14:09:26,445 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 8 [2024-11-13 14:09:26,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:26,446 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2024-11-13 14:09:26,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 14:09:26,446 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2024-11-13 14:09:26,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-13 14:09:26,449 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:26,449 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:09:26,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 14:09:26,450 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:26,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:26,450 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2024-11-13 14:09:26,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:26,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659064249] [2024-11-13 14:09:26,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:26,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:26,597 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 14:09:26,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:26,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659064249] [2024-11-13 14:09:26,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659064249] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:09:26,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:09:26,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:09:26,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673916644] [2024-11-13 14:09:26,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:09:26,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:09:26,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:26,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:09:26,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:09:26,604 INFO L87 Difference]: Start difference. First operand 45 states and 53 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 14:09:26,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:26,704 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2024-11-13 14:09:26,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:09:26,705 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 14:09:26,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:26,707 INFO L225 Difference]: With dead ends: 51 [2024-11-13 14:09:26,707 INFO L226 Difference]: Without dead ends: 51 [2024-11-13 14:09:26,708 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 14:09:26,709 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:26,709 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 158 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:09:26,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-13 14:09:26,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2024-11-13 14:09:26,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:26,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2024-11-13 14:09:26,718 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 8 [2024-11-13 14:09:26,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:26,718 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2024-11-13 14:09:26,718 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 14:09:26,719 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2024-11-13 14:09:26,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-13 14:09:26,719 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:26,719 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:09:26,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 14:09:26,720 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:26,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:26,720 INFO L85 PathProgramCache]: Analyzing trace with hash 180494259, now seen corresponding path program 1 times [2024-11-13 14:09:26,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:26,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415094114] [2024-11-13 14:09:26,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:26,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:26,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:27,016 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 14:09:27,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:27,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415094114] [2024-11-13 14:09:27,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415094114] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:09:27,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:09:27,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 14:09:27,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391183425] [2024-11-13 14:09:27,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:09:27,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:09:27,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:27,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:09:27,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 14:09:27,019 INFO L87 Difference]: Start difference. First operand 45 states and 53 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 14:09:27,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:27,076 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2024-11-13 14:09:27,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:09:27,077 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 14:09:27,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:27,077 INFO L225 Difference]: With dead ends: 43 [2024-11-13 14:09:27,078 INFO L226 Difference]: Without dead ends: 43 [2024-11-13 14:09:27,078 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 14:09:27,079 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 15 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:27,079 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 51 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:09:27,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-13 14:09:27,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-13 14:09:27,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.7) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:27,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2024-11-13 14:09:27,085 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 8 [2024-11-13 14:09:27,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:27,085 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2024-11-13 14:09:27,085 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 14:09:27,086 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2024-11-13 14:09:27,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-13 14:09:27,086 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:27,086 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:09:27,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-13 14:09:27,087 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:27,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:27,087 INFO L85 PathProgramCache]: Analyzing trace with hash 180494260, now seen corresponding path program 1 times [2024-11-13 14:09:27,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:27,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494750192] [2024-11-13 14:09:27,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:27,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:27,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:27,478 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 14:09:27,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:27,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494750192] [2024-11-13 14:09:27,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494750192] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:09:27,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:09:27,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:09:27,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471760675] [2024-11-13 14:09:27,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:09:27,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:09:27,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:27,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:09:27,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:09:27,481 INFO L87 Difference]: Start difference. First operand 43 states and 51 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 14:09:27,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:27,707 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2024-11-13 14:09:27,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:09:27,711 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 14:09:27,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:27,712 INFO L225 Difference]: With dead ends: 47 [2024-11-13 14:09:27,712 INFO L226 Difference]: Without dead ends: 47 [2024-11-13 14:09:27,712 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-13 14:09:27,713 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 41 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:27,714 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 97 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 14:09:27,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-13 14:09:27,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2024-11-13 14:09:27,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.6875) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:27,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2024-11-13 14:09:27,724 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 8 [2024-11-13 14:09:27,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:27,725 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2024-11-13 14:09:27,725 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 14:09:27,725 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2024-11-13 14:09:27,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 14:09:27,725 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:27,726 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:09:27,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 14:09:27,726 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:27,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:27,726 INFO L85 PathProgramCache]: Analyzing trace with hash 690578077, now seen corresponding path program 1 times [2024-11-13 14:09:27,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:27,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630709662] [2024-11-13 14:09:27,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:27,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:27,815 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 14:09:27,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:27,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630709662] [2024-11-13 14:09:27,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630709662] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:09:27,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:09:27,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 14:09:27,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25035410] [2024-11-13 14:09:27,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:09:27,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:09:27,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:27,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:09:27,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:09:27,821 INFO L87 Difference]: Start difference. First operand 45 states and 54 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 14:09:27,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:27,882 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2024-11-13 14:09:27,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:09:27,883 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 14:09:27,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:27,884 INFO L225 Difference]: With dead ends: 61 [2024-11-13 14:09:27,884 INFO L226 Difference]: Without dead ends: 61 [2024-11-13 14:09:27,885 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 14:09:27,886 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:27,886 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 110 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:09:27,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-13 14:09:27,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2024-11-13 14:09:27,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 54 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:27,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2024-11-13 14:09:27,900 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 10 [2024-11-13 14:09:27,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:27,900 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2024-11-13 14:09:27,901 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 14:09:27,901 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2024-11-13 14:09:27,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 14:09:27,904 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:27,905 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:09:27,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-13 14:09:27,905 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:27,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:27,906 INFO L85 PathProgramCache]: Analyzing trace with hash 747836379, now seen corresponding path program 1 times [2024-11-13 14:09:27,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:27,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084168270] [2024-11-13 14:09:27,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:27,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:28,067 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 14:09:28,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:28,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084168270] [2024-11-13 14:09:28,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084168270] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:09:28,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:09:28,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 14:09:28,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921778238] [2024-11-13 14:09:28,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:09:28,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:09:28,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:28,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:09:28,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:09:28,070 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 14:09:28,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:28,215 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2024-11-13 14:09:28,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 14:09:28,216 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 14:09:28,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:28,217 INFO L225 Difference]: With dead ends: 67 [2024-11-13 14:09:28,217 INFO L226 Difference]: Without dead ends: 67 [2024-11-13 14:09:28,217 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-11-13 14:09:28,218 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 42 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:28,219 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 126 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:09:28,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-13 14:09:28,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2024-11-13 14:09:28,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 55 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:28,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2024-11-13 14:09:28,231 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 10 [2024-11-13 14:09:28,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:28,231 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2024-11-13 14:09:28,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 14:09:28,232 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2024-11-13 14:09:28,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 14:09:28,232 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:28,232 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:09:28,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-13 14:09:28,233 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:28,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:28,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1772123555, now seen corresponding path program 1 times [2024-11-13 14:09:28,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:28,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46832609] [2024-11-13 14:09:28,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:28,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:28,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:28,659 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 14:09:28,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:28,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46832609] [2024-11-13 14:09:28,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46832609] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:09:28,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:09:28,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 14:09:28,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603192236] [2024-11-13 14:09:28,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:09:28,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:09:28,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:28,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:09:28,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:09:28,663 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:28,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:28,783 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2024-11-13 14:09:28,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:09:28,784 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-13 14:09:28,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:28,785 INFO L225 Difference]: With dead ends: 66 [2024-11-13 14:09:28,787 INFO L226 Difference]: Without dead ends: 66 [2024-11-13 14:09:28,788 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:09:28,789 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 32 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:28,789 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 97 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:09:28,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-13 14:09:28,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2024-11-13 14:09:28,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.558139534883721) internal successors, (67), 53 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 14:09:28,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2024-11-13 14:09:28,799 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 10 [2024-11-13 14:09:28,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:28,799 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2024-11-13 14:09:28,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:28,800 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2024-11-13 14:09:28,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 14:09:28,800 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:28,800 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:09:28,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-13 14:09:28,800 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:28,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:28,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1772123554, now seen corresponding path program 1 times [2024-11-13 14:09:28,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:28,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63394000] [2024-11-13 14:09:28,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:28,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:29,132 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 14:09:29,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:29,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63394000] [2024-11-13 14:09:29,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63394000] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:09:29,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:09:29,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 14:09:29,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196667288] [2024-11-13 14:09:29,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:09:29,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 14:09:29,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:29,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 14:09:29,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:09:29,137 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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 14:09:29,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:29,303 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2024-11-13 14:09:29,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 14:09:29,304 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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 14:09:29,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:29,304 INFO L225 Difference]: With dead ends: 57 [2024-11-13 14:09:29,304 INFO L226 Difference]: Without dead ends: 57 [2024-11-13 14:09:29,305 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-13 14:09:29,306 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 19 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:29,306 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 111 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:09:29,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-13 14:09:29,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2024-11-13 14:09:29,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 55 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:29,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2024-11-13 14:09:29,316 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 10 [2024-11-13 14:09:29,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:29,316 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2024-11-13 14:09:29,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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 14:09:29,317 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2024-11-13 14:09:29,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-13 14:09:29,317 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:29,317 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:09:29,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-13 14:09:29,317 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:29,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:29,318 INFO L85 PathProgramCache]: Analyzing trace with hash -66917769, now seen corresponding path program 1 times [2024-11-13 14:09:29,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:29,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609394468] [2024-11-13 14:09:29,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:29,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:29,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:29,544 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 14:09:29,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:29,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609394468] [2024-11-13 14:09:29,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609394468] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:09:29,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:09:29,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 14:09:29,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137929033] [2024-11-13 14:09:29,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:09:29,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:09:29,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:29,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:09:29,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:09:29,547 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:29,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:29,575 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2024-11-13 14:09:29,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:09:29,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-13 14:09:29,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:29,577 INFO L225 Difference]: With dead ends: 70 [2024-11-13 14:09:29,578 INFO L226 Difference]: Without dead ends: 70 [2024-11-13 14:09:29,578 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 14:09:29,579 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:29,580 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 77 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:09:29,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-13 14:09:29,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2024-11-13 14:09:29,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 58 states have (on average 1.5) internal successors, (87), 68 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 14:09:29,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2024-11-13 14:09:29,593 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 11 [2024-11-13 14:09:29,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:29,593 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2024-11-13 14:09:29,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:29,593 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2024-11-13 14:09:29,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-13 14:09:29,594 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:29,594 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:09:29,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-13 14:09:29,594 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:29,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:29,599 INFO L85 PathProgramCache]: Analyzing trace with hash 613140601, now seen corresponding path program 1 times [2024-11-13 14:09:29,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:29,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633717390] [2024-11-13 14:09:29,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:29,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:29,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:29,846 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 14:09:29,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:29,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633717390] [2024-11-13 14:09:29,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633717390] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:09:29,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:09:29,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 14:09:29,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483973610] [2024-11-13 14:09:29,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:09:29,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:09:29,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:29,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:09:29,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:09:29,855 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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 14:09:29,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:29,895 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2024-11-13 14:09:29,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:09:29,900 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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 14:09:29,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:29,901 INFO L225 Difference]: With dead ends: 68 [2024-11-13 14:09:29,903 INFO L226 Difference]: Without dead ends: 68 [2024-11-13 14:09:29,904 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 14:09:29,905 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 17 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 78 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 14:09:29,905 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 78 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:09:29,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-13 14:09:29,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2024-11-13 14:09:29,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 54 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:29,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2024-11-13 14:09:29,913 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 11 [2024-11-13 14:09:29,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:29,913 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2024-11-13 14:09:29,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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 14:09:29,914 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2024-11-13 14:09:29,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-13 14:09:29,914 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:29,915 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:09:29,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-13 14:09:29,917 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:29,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:29,918 INFO L85 PathProgramCache]: Analyzing trace with hash -194577898, now seen corresponding path program 1 times [2024-11-13 14:09:29,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:29,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930859873] [2024-11-13 14:09:29,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:29,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:29,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:30,373 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 14:09:30,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:30,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930859873] [2024-11-13 14:09:30,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930859873] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:09:30,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120212201] [2024-11-13 14:09:30,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:30,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:09:30,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:09:30,377 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:09:30,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 14:09:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:30,497 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-13 14:09:30,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:09:30,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:09:30,636 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 14:09:30,651 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 14:09:30,932 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 14:09:30,932 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:09:31,254 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:09:31,331 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 14:09:31,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120212201] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:09:31,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:09:31,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-13 14:09:31,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829310705] [2024-11-13 14:09:31,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:09:31,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 14:09:31,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:31,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 14:09:31,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-11-13 14:09:31,334 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 17 states, 16 states have (on average 1.9375) internal successors, (31), 17 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 14:09:31,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:31,736 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2024-11-13 14:09:31,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 14:09:31,736 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 17 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 14:09:31,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:31,737 INFO L225 Difference]: With dead ends: 58 [2024-11-13 14:09:31,737 INFO L226 Difference]: Without dead ends: 58 [2024-11-13 14:09:31,741 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2024-11-13 14:09:31,742 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 31 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:31,743 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 191 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 14:09:31,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-13 14:09:31,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2024-11-13 14:09:31,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 49 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 14:09:31,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2024-11-13 14:09:31,747 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 11 [2024-11-13 14:09:31,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:31,747 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2024-11-13 14:09:31,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 17 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 14:09:31,747 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2024-11-13 14:09:31,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-13 14:09:31,748 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:31,748 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:09:31,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 14:09:31,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:09:31,952 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:31,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:31,952 INFO L85 PathProgramCache]: Analyzing trace with hash -2074450838, now seen corresponding path program 1 times [2024-11-13 14:09:31,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:31,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690122906] [2024-11-13 14:09:31,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:31,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:32,193 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 14:09:32,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:32,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690122906] [2024-11-13 14:09:32,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690122906] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:09:32,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:09:32,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 14:09:32,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773227382] [2024-11-13 14:09:32,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:09:32,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:09:32,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:32,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:09:32,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:09:32,196 INFO L87 Difference]: Start difference. First operand 50 states and 61 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 14:09:32,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:32,276 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2024-11-13 14:09:32,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:09:32,277 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 14:09:32,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:32,278 INFO L225 Difference]: With dead ends: 58 [2024-11-13 14:09:32,278 INFO L226 Difference]: Without dead ends: 58 [2024-11-13 14:09:32,278 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:09:32,279 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 1 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:32,279 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 93 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:09:32,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-13 14:09:32,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2024-11-13 14:09:32,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 56 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:32,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2024-11-13 14:09:32,284 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 12 [2024-11-13 14:09:32,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:32,284 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2024-11-13 14:09:32,284 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 14:09:32,284 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2024-11-13 14:09:32,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-13 14:09:32,284 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:32,285 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:09:32,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-13 14:09:32,285 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:32,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:32,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1411169832, now seen corresponding path program 1 times [2024-11-13 14:09:32,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:32,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126838465] [2024-11-13 14:09:32,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:32,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:32,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:32,492 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 14:09:32,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:32,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126838465] [2024-11-13 14:09:32,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126838465] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:09:32,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:09:32,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:09:32,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983565962] [2024-11-13 14:09:32,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:09:32,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:09:32,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:32,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:09:32,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:09:32,494 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:32,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:32,596 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2024-11-13 14:09:32,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 14:09:32,597 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-13 14:09:32,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:32,598 INFO L225 Difference]: With dead ends: 64 [2024-11-13 14:09:32,598 INFO L226 Difference]: Without dead ends: 64 [2024-11-13 14:09:32,598 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:09:32,599 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 21 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:32,599 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 105 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:09:32,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-13 14:09:32,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2024-11-13 14:09:32,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 56 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:32,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2024-11-13 14:09:32,603 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 12 [2024-11-13 14:09:32,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:32,604 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2024-11-13 14:09:32,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:32,604 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2024-11-13 14:09:32,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-13 14:09:32,605 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:32,605 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:09:32,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-13 14:09:32,605 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:32,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:32,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1394392468, now seen corresponding path program 1 times [2024-11-13 14:09:32,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:32,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827678549] [2024-11-13 14:09:32,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:32,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:32,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:32,806 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 14:09:32,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:32,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827678549] [2024-11-13 14:09:32,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827678549] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:09:32,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:09:32,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:09:32,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403829306] [2024-11-13 14:09:32,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:09:32,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:09:32,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:32,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:09:32,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:09:32,808 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:32,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:32,893 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2024-11-13 14:09:32,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:09:32,894 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-13 14:09:32,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:32,895 INFO L225 Difference]: With dead ends: 67 [2024-11-13 14:09:32,895 INFO L226 Difference]: Without dead ends: 67 [2024-11-13 14:09:32,895 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:09:32,896 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:32,896 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 114 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:09:32,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-13 14:09:32,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 53. [2024-11-13 14:09:32,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 52 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 14:09:32,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-11-13 14:09:32,902 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 12 [2024-11-13 14:09:32,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:32,902 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-11-13 14:09:32,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:32,903 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-11-13 14:09:32,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-13 14:09:32,903 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:32,903 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:09:32,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-13 14:09:32,904 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:32,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:32,904 INFO L85 PathProgramCache]: Analyzing trace with hash 2091228202, now seen corresponding path program 1 times [2024-11-13 14:09:32,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:32,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995254084] [2024-11-13 14:09:32,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:32,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:32,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:33,119 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 14:09:33,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:33,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995254084] [2024-11-13 14:09:33,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995254084] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:09:33,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:09:33,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:09:33,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934096298] [2024-11-13 14:09:33,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:09:33,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:09:33,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:33,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:09:33,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:09:33,121 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:33,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:33,201 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2024-11-13 14:09:33,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:09:33,201 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-13 14:09:33,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:33,202 INFO L225 Difference]: With dead ends: 52 [2024-11-13 14:09:33,202 INFO L226 Difference]: Without dead ends: 52 [2024-11-13 14:09:33,202 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:09:33,203 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:33,203 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 92 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:09:33,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-13 14:09:33,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2024-11-13 14:09:33,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 48 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 14:09:33,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2024-11-13 14:09:33,208 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 12 [2024-11-13 14:09:33,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:33,208 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2024-11-13 14:09:33,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:33,209 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2024-11-13 14:09:33,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-13 14:09:33,209 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:33,211 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:09:33,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-13 14:09:33,212 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:33,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:33,212 INFO L85 PathProgramCache]: Analyzing trace with hash 405198140, now seen corresponding path program 1 times [2024-11-13 14:09:33,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:33,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544827107] [2024-11-13 14:09:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:33,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:33,524 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 14:09:33,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:33,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544827107] [2024-11-13 14:09:33,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544827107] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:09:33,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045491206] [2024-11-13 14:09:33,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:33,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:09:33,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:09:33,527 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:09:33,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 14:09:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:33,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-13 14:09:33,622 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:09:33,725 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 14:09:33,739 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 14:09:34,184 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 14:09:34,184 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:09:34,659 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 14:09:34,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045491206] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:09:34,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:09:34,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-11-13 14:09:34,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482056509] [2024-11-13 14:09:34,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:09:34,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 14:09:34,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:34,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 14:09:34,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2024-11-13 14:09:34,662 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:35,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:35,180 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2024-11-13 14:09:35,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 14:09:35,181 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 14:09:35,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:35,182 INFO L225 Difference]: With dead ends: 51 [2024-11-13 14:09:35,182 INFO L226 Difference]: Without dead ends: 51 [2024-11-13 14:09:35,183 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2024-11-13 14:09:35,183 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:35,184 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 237 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 14:09:35,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-13 14:09:35,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2024-11-13 14:09:35,186 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 14:09:35,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2024-11-13 14:09:35,187 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 13 [2024-11-13 14:09:35,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:35,187 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2024-11-13 14:09:35,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:35,188 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2024-11-13 14:09:35,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-13 14:09:35,188 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:35,188 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:09:35,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 14:09:35,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-13 14:09:35,393 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:35,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:35,393 INFO L85 PathProgramCache]: Analyzing trace with hash -682429843, now seen corresponding path program 1 times [2024-11-13 14:09:35,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:35,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791713333] [2024-11-13 14:09:35,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:35,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:35,455 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 14:09:35,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:35,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791713333] [2024-11-13 14:09:35,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791713333] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:09:35,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:09:35,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 14:09:35,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726736229] [2024-11-13 14:09:35,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:09:35,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:09:35,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:35,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:09:35,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:09:35,458 INFO L87 Difference]: Start difference. First operand 46 states and 56 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 14:09:35,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:35,511 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2024-11-13 14:09:35,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:09:35,512 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 14:09:35,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:35,512 INFO L225 Difference]: With dead ends: 45 [2024-11-13 14:09:35,512 INFO L226 Difference]: Without dead ends: 45 [2024-11-13 14:09:35,513 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 14:09:35,513 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 22 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:35,514 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:09:35,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-13 14:09:35,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-11-13 14:09:35,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 44 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 14:09:35,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2024-11-13 14:09:35,517 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 14 [2024-11-13 14:09:35,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:35,517 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2024-11-13 14:09:35,517 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 14:09:35,517 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2024-11-13 14:09:35,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-13 14:09:35,522 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:35,522 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:09:35,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-13 14:09:35,522 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:35,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:35,523 INFO L85 PathProgramCache]: Analyzing trace with hash -682429842, now seen corresponding path program 1 times [2024-11-13 14:09:35,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:35,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124469046] [2024-11-13 14:09:35,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:35,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:35,657 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 14:09:35,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:35,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124469046] [2024-11-13 14:09:35,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124469046] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:09:35,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:09:35,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:09:35,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350365575] [2024-11-13 14:09:35,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:09:35,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:09:35,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:35,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:09:35,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:09:35,658 INFO L87 Difference]: Start difference. First operand 45 states and 55 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 14:09:35,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:35,765 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2024-11-13 14:09:35,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 14:09:35,766 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 14:09:35,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:35,767 INFO L225 Difference]: With dead ends: 53 [2024-11-13 14:09:35,767 INFO L226 Difference]: Without dead ends: 53 [2024-11-13 14:09:35,767 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:09:35,768 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 19 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:35,768 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 90 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:09:35,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-13 14:09:35,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2024-11-13 14:09:35,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.4) 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 14:09:35,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2024-11-13 14:09:35,771 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 14 [2024-11-13 14:09:35,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:35,771 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2024-11-13 14:09:35,772 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 14:09:35,772 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2024-11-13 14:09:35,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-13 14:09:35,772 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:35,772 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:09:35,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-13 14:09:35,773 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:35,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:35,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1314918599, now seen corresponding path program 1 times [2024-11-13 14:09:35,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:35,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901295739] [2024-11-13 14:09:35,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:35,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:36,137 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 14:09:36,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:36,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901295739] [2024-11-13 14:09:36,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901295739] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:09:36,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306002280] [2024-11-13 14:09:36,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:36,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:09:36,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:09:36,141 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:09:36,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 14:09:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:36,270 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 14:09:36,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:09:36,315 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 14:09:36,378 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 14:09:36,379 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:09:36,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306002280] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:09:36,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:09:36,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2024-11-13 14:09:36,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011272714] [2024-11-13 14:09:36,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:09:36,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:09:36,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:36,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:09:36,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-11-13 14:09:36,380 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 14:09:36,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:36,454 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2024-11-13 14:09:36,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:09:36,455 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 14:09:36,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:36,455 INFO L225 Difference]: With dead ends: 57 [2024-11-13 14:09:36,456 INFO L226 Difference]: Without dead ends: 57 [2024-11-13 14:09:36,456 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-13 14:09:36,457 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:36,457 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 142 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:09:36,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-13 14:09:36,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2024-11-13 14:09:36,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.32) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:36,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2024-11-13 14:09:36,460 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 16 [2024-11-13 14:09:36,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:36,460 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2024-11-13 14:09:36,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 14:09:36,460 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2024-11-13 14:09:36,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-13 14:09:36,461 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:36,461 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:09:36,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 14:09:36,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:09:36,662 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:36,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:36,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1573084037, now seen corresponding path program 1 times [2024-11-13 14:09:36,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:36,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894716193] [2024-11-13 14:09:36,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:36,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:36,975 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 14:09:36,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:36,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894716193] [2024-11-13 14:09:36,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894716193] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:09:36,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869881055] [2024-11-13 14:09:36,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:36,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:09:36,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:09:36,979 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:09:36,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 14:09:37,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:37,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-13 14:09:37,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:09:37,174 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 14:09:37,238 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 14:09:37,238 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:09:37,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869881055] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:09:37,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:09:37,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 15 [2024-11-13 14:09:37,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425826371] [2024-11-13 14:09:37,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:09:37,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 14:09:37,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:37,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 14:09:37,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2024-11-13 14:09:37,241 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 14:09:37,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:37,383 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2024-11-13 14:09:37,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 14:09:37,384 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 14:09:37,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:37,384 INFO L225 Difference]: With dead ends: 64 [2024-11-13 14:09:37,384 INFO L226 Difference]: Without dead ends: 64 [2024-11-13 14:09:37,385 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2024-11-13 14:09:37,387 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 31 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:37,387 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 164 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:09:37,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-13 14:09:37,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2024-11-13 14:09:37,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.3478260869565217) 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 14:09:37,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2024-11-13 14:09:37,391 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 16 [2024-11-13 14:09:37,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:37,391 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2024-11-13 14:09:37,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 14:09:37,392 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2024-11-13 14:09:37,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-13 14:09:37,392 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:37,392 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:09:37,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 14:09:37,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:09:37,599 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:37,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:37,600 INFO L85 PathProgramCache]: Analyzing trace with hash 986278023, now seen corresponding path program 1 times [2024-11-13 14:09:37,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:37,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126016253] [2024-11-13 14:09:37,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:37,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:37,903 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 14:09:37,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:37,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126016253] [2024-11-13 14:09:37,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126016253] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:09:37,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336256442] [2024-11-13 14:09:37,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:37,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:09:37,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:09:37,906 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:09:37,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 14:09:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:38,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-13 14:09:38,020 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:09:38,096 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 14:09:38,167 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 14:09:38,167 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:09:38,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336256442] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:09:38,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:09:38,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2024-11-13 14:09:38,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131794840] [2024-11-13 14:09:38,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:09:38,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 14:09:38,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:38,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 14:09:38,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2024-11-13 14:09:38,170 INFO L87 Difference]: Start difference. First operand 52 states and 62 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 14:09:38,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:38,288 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2024-11-13 14:09:38,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 14:09:38,288 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 14:09:38,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:38,289 INFO L225 Difference]: With dead ends: 66 [2024-11-13 14:09:38,289 INFO L226 Difference]: Without dead ends: 66 [2024-11-13 14:09:38,290 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2024-11-13 14:09:38,291 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 22 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:38,291 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 153 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:09:38,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-13 14:09:38,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 53. [2024-11-13 14:09:38,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 52 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 14:09:38,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-11-13 14:09:38,295 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 16 [2024-11-13 14:09:38,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:38,295 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-11-13 14:09:38,295 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 14:09:38,295 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-11-13 14:09:38,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-13 14:09:38,296 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:38,296 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:09:38,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 14:09:38,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:09:38,501 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:38,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:38,502 INFO L85 PathProgramCache]: Analyzing trace with hash 2107769407, now seen corresponding path program 1 times [2024-11-13 14:09:38,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:38,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111981132] [2024-11-13 14:09:38,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:38,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:38,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:38,578 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 14:09:38,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:38,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111981132] [2024-11-13 14:09:38,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111981132] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:09:38,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:09:38,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 14:09:38,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043612775] [2024-11-13 14:09:38,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:09:38,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:09:38,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:38,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:09:38,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:09:38,580 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:38,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:38,645 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2024-11-13 14:09:38,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:09:38,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-13 14:09:38,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:38,646 INFO L225 Difference]: With dead ends: 52 [2024-11-13 14:09:38,646 INFO L226 Difference]: Without dead ends: 52 [2024-11-13 14:09:38,647 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 14:09:38,647 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 20 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:38,647 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 71 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:09:38,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-13 14:09:38,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-13 14:09:38,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:38,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2024-11-13 14:09:38,651 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 17 [2024-11-13 14:09:38,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:38,651 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2024-11-13 14:09:38,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:38,651 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2024-11-13 14:09:38,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-13 14:09:38,652 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:38,652 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:09:38,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-13 14:09:38,652 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:38,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:38,653 INFO L85 PathProgramCache]: Analyzing trace with hash 2107769408, now seen corresponding path program 1 times [2024-11-13 14:09:38,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:38,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404085062] [2024-11-13 14:09:38,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:38,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:38,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:38,824 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 14:09:38,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:38,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404085062] [2024-11-13 14:09:38,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404085062] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:09:38,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:09:38,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 14:09:38,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481095802] [2024-11-13 14:09:38,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:09:38,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 14:09:38,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:38,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 14:09:38,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:09:38,827 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:38,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:38,931 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2024-11-13 14:09:38,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 14:09:38,932 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-13 14:09:38,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:38,933 INFO L225 Difference]: With dead ends: 69 [2024-11-13 14:09:38,933 INFO L226 Difference]: Without dead ends: 69 [2024-11-13 14:09:38,933 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 14:09:38,934 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 25 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:38,934 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 115 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:09:38,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-13 14:09:38,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 54. [2024-11-13 14:09:38,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:38,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2024-11-13 14:09:38,937 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 17 [2024-11-13 14:09:38,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:38,937 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2024-11-13 14:09:38,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:38,938 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2024-11-13 14:09:38,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-13 14:09:38,938 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:38,938 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 14:09:38,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-13 14:09:38,939 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:38,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:38,939 INFO L85 PathProgramCache]: Analyzing trace with hash 916342232, now seen corresponding path program 1 times [2024-11-13 14:09:38,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:38,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928094551] [2024-11-13 14:09:38,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:38,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:38,987 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 14:09:38,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:38,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928094551] [2024-11-13 14:09:38,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928094551] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:09:38,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:09:38,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 14:09:38,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102484280] [2024-11-13 14:09:38,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:09:38,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:09:38,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:38,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:09:38,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:09:38,989 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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 14:09:39,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:39,044 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2024-11-13 14:09:39,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:09:39,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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 14:09:39,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:39,045 INFO L225 Difference]: With dead ends: 53 [2024-11-13 14:09:39,046 INFO L226 Difference]: Without dead ends: 53 [2024-11-13 14:09:39,046 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:09:39,046 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 8 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:39,047 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 59 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:09:39,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-13 14:09:39,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-11-13 14:09:39,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 52 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 14:09:39,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-11-13 14:09:39,049 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 18 [2024-11-13 14:09:39,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:39,050 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-11-13 14:09:39,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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 14:09:39,050 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-11-13 14:09:39,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-13 14:09:39,051 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:39,051 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 14:09:39,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-13 14:09:39,051 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:39,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:39,052 INFO L85 PathProgramCache]: Analyzing trace with hash 916342233, now seen corresponding path program 1 times [2024-11-13 14:09:39,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:39,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004840747] [2024-11-13 14:09:39,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:39,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:39,264 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 14:09:39,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:39,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004840747] [2024-11-13 14:09:39,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004840747] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:09:39,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:09:39,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 14:09:39,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139884526] [2024-11-13 14:09:39,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:09:39,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 14:09:39,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:39,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 14:09:39,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:09:39,267 INFO L87 Difference]: Start difference. First operand 53 states and 64 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 14:09:39,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:39,387 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2024-11-13 14:09:39,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 14:09:39,388 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 14:09:39,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:39,388 INFO L225 Difference]: With dead ends: 58 [2024-11-13 14:09:39,388 INFO L226 Difference]: Without dead ends: 58 [2024-11-13 14:09:39,389 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 14:09:39,389 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:39,390 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 110 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:09:39,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-13 14:09:39,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2024-11-13 14:09:39,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 56 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:39,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2024-11-13 14:09:39,393 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 18 [2024-11-13 14:09:39,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:39,393 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2024-11-13 14:09:39,393 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 14:09:39,394 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2024-11-13 14:09:39,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-13 14:09:39,394 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:39,394 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 14:09:39,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-13 14:09:39,395 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:39,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:39,395 INFO L85 PathProgramCache]: Analyzing trace with hash 2014876901, now seen corresponding path program 1 times [2024-11-13 14:09:39,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:39,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385472615] [2024-11-13 14:09:39,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:39,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:39,622 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 14:09:39,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:39,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385472615] [2024-11-13 14:09:39,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385472615] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:09:39,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589884940] [2024-11-13 14:09:39,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:39,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:09:39,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:09:39,625 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:09:39,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 14:09:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:39,740 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-13 14:09:39,742 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:09:39,751 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 14:09:39,851 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 14:09:39,851 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:09:40,069 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 14:09:40,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589884940] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:09:40,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:09:40,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2024-11-13 14:09:40,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279700343] [2024-11-13 14:09:40,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:09:40,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-13 14:09:40,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:40,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-13 14:09:40,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-11-13 14:09:40,072 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 20 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:40,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:40,293 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2024-11-13 14:09:40,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 14:09:40,294 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have 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 14:09:40,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:40,294 INFO L225 Difference]: With dead ends: 69 [2024-11-13 14:09:40,294 INFO L226 Difference]: Without dead ends: 69 [2024-11-13 14:09:40,295 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2024-11-13 14:09:40,295 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 32 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:40,296 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 203 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 14:09:40,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-13 14:09:40,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2024-11-13 14:09:40,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:40,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2024-11-13 14:09:40,305 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 19 [2024-11-13 14:09:40,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:40,305 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2024-11-13 14:09:40,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:40,305 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2024-11-13 14:09:40,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-13 14:09:40,308 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:40,308 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] [2024-11-13 14:09:40,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-13 14:09:40,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:09:40,512 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:40,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:40,513 INFO L85 PathProgramCache]: Analyzing trace with hash -60638648, now seen corresponding path program 1 times [2024-11-13 14:09:40,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:40,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705298381] [2024-11-13 14:09:40,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:40,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:40,739 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 14:09:40,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:40,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705298381] [2024-11-13 14:09:40,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705298381] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:09:40,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:09:40,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-13 14:09:40,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004548977] [2024-11-13 14:09:40,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:09:40,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 14:09:40,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:40,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 14:09:40,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-13 14:09:40,744 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:40,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:40,815 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2024-11-13 14:09:40,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 14:09:40,815 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-13 14:09:40,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:40,817 INFO L225 Difference]: With dead ends: 92 [2024-11-13 14:09:40,817 INFO L226 Difference]: Without dead ends: 92 [2024-11-13 14:09:40,819 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-13 14:09:40,820 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:40,820 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 163 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:09:40,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-13 14:09:40,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2024-11-13 14:09:40,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 86 states have (on average 1.2674418604651163) internal successors, (109), 89 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 14:09:40,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 109 transitions. [2024-11-13 14:09:40,835 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 109 transitions. Word has length 21 [2024-11-13 14:09:40,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:40,835 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 109 transitions. [2024-11-13 14:09:40,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:40,835 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 109 transitions. [2024-11-13 14:09:40,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-13 14:09:40,836 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:40,836 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 14:09:40,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-11-13 14:09:40,836 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:40,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:40,837 INFO L85 PathProgramCache]: Analyzing trace with hash -733548162, now seen corresponding path program 2 times [2024-11-13 14:09:40,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:40,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087416514] [2024-11-13 14:09:40,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:40,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:41,254 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 14:09:41,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:41,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087416514] [2024-11-13 14:09:41,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087416514] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:09:41,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952247820] [2024-11-13 14:09:41,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:09:41,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:09:41,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:09:41,258 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:09:41,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 14:09:41,389 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:09:41,389 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:09:41,391 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-13 14:09:41,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:09:41,501 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 14:09:41,619 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 14:09:41,619 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:09:41,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 14:09:41,650 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 14:09:41,749 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 14:09:41,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952247820] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:09:41,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:09:41,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2024-11-13 14:09:41,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97513773] [2024-11-13 14:09:41,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:09:41,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 14:09:41,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:41,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 14:09:41,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2024-11-13 14:09:41,752 INFO L87 Difference]: Start difference. First operand 90 states and 109 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:42,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:42,620 INFO L93 Difference]: Finished difference Result 157 states and 187 transitions. [2024-11-13 14:09:42,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-13 14:09:42,620 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 14:09:42,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:42,621 INFO L225 Difference]: With dead ends: 157 [2024-11-13 14:09:42,621 INFO L226 Difference]: Without dead ends: 157 [2024-11-13 14:09:42,622 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2024-11-13 14:09:42,623 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 66 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:42,624 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 494 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 14:09:42,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-13 14:09:42,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 116. [2024-11-13 14:09:42,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 112 states have (on average 1.2589285714285714) internal successors, (141), 115 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:42,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 141 transitions. [2024-11-13 14:09:42,629 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 141 transitions. Word has length 21 [2024-11-13 14:09:42,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:42,629 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 141 transitions. [2024-11-13 14:09:42,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:42,629 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 141 transitions. [2024-11-13 14:09:42,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-13 14:09:42,630 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:42,630 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] [2024-11-13 14:09:42,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-13 14:09:42,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:09:42,831 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:42,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:42,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1749582390, now seen corresponding path program 1 times [2024-11-13 14:09:42,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:42,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007186388] [2024-11-13 14:09:42,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:42,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:42,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:43,116 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 14:09:43,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:43,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007186388] [2024-11-13 14:09:43,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007186388] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:09:43,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:09:43,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-13 14:09:43,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494364545] [2024-11-13 14:09:43,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:09:43,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 14:09:43,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:43,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 14:09:43,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-13 14:09:43,118 INFO L87 Difference]: Start difference. First operand 116 states and 141 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:43,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:43,245 INFO L93 Difference]: Finished difference Result 142 states and 167 transitions. [2024-11-13 14:09:43,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 14:09:43,245 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-13 14:09:43,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:43,246 INFO L225 Difference]: With dead ends: 142 [2024-11-13 14:09:43,246 INFO L226 Difference]: Without dead ends: 142 [2024-11-13 14:09:43,247 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-13 14:09:43,247 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 16 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:43,247 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 188 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:09:43,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-13 14:09:43,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 113. [2024-11-13 14:09:43,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 109 states have (on average 1.2568807339449541) internal successors, (137), 112 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:43,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 137 transitions. [2024-11-13 14:09:43,258 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 137 transitions. Word has length 21 [2024-11-13 14:09:43,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:43,258 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 137 transitions. [2024-11-13 14:09:43,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:43,259 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 137 transitions. [2024-11-13 14:09:43,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-13 14:09:43,259 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:43,260 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] [2024-11-13 14:09:43,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-11-13 14:09:43,260 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:43,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:43,263 INFO L85 PathProgramCache]: Analyzing trace with hash 551240200, now seen corresponding path program 1 times [2024-11-13 14:09:43,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:43,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177078102] [2024-11-13 14:09:43,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:43,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:43,536 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 14:09:43,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:43,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177078102] [2024-11-13 14:09:43,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177078102] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:09:43,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:09:43,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-13 14:09:43,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716258084] [2024-11-13 14:09:43,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:09:43,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 14:09:43,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:43,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 14:09:43,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-13 14:09:43,539 INFO L87 Difference]: Start difference. First operand 113 states and 137 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:43,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:43,646 INFO L93 Difference]: Finished difference Result 163 states and 196 transitions. [2024-11-13 14:09:43,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 14:09:43,646 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-13 14:09:43,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:43,647 INFO L225 Difference]: With dead ends: 163 [2024-11-13 14:09:43,647 INFO L226 Difference]: Without dead ends: 163 [2024-11-13 14:09:43,647 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-13 14:09:43,648 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:43,648 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 151 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 14:09:43,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-11-13 14:09:43,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 115. [2024-11-13 14:09:43,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 111 states have (on average 1.2702702702702702) internal successors, (141), 114 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:43,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 141 transitions. [2024-11-13 14:09:43,666 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 141 transitions. Word has length 21 [2024-11-13 14:09:43,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:43,666 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 141 transitions. [2024-11-13 14:09:43,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:43,666 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 141 transitions. [2024-11-13 14:09:43,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-13 14:09:43,667 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:43,667 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:09:43,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-11-13 14:09:43,668 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:43,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:43,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1879842721, now seen corresponding path program 1 times [2024-11-13 14:09:43,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:43,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221910878] [2024-11-13 14:09:43,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:43,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:43,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:43,850 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 14:09:43,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:43,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221910878] [2024-11-13 14:09:43,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221910878] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:09:43,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:09:43,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 14:09:43,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076772110] [2024-11-13 14:09:43,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:09:43,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:09:43,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:43,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:09:43,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:09:43,852 INFO L87 Difference]: Start difference. First operand 115 states and 141 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 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 14:09:43,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:43,883 INFO L93 Difference]: Finished difference Result 114 states and 140 transitions. [2024-11-13 14:09:43,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:09:43,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 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 14:09:43,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:43,885 INFO L225 Difference]: With dead ends: 114 [2024-11-13 14:09:43,885 INFO L226 Difference]: Without dead ends: 96 [2024-11-13 14:09:43,885 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 14:09:43,886 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:43,886 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 50 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:09:43,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-13 14:09:43,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2024-11-13 14:09:43,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 93 states have (on average 1.2150537634408602) internal successors, (113), 95 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:43,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2024-11-13 14:09:43,894 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 22 [2024-11-13 14:09:43,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:43,894 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2024-11-13 14:09:43,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 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 14:09:43,895 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2024-11-13 14:09:43,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-13 14:09:43,895 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:43,895 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, 1] [2024-11-13 14:09:43,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-11-13 14:09:43,896 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:43,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:43,896 INFO L85 PathProgramCache]: Analyzing trace with hash -565193520, now seen corresponding path program 1 times [2024-11-13 14:09:43,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:43,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426796918] [2024-11-13 14:09:43,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:43,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:43,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:44,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:09:44,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:44,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426796918] [2024-11-13 14:09:44,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426796918] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:09:44,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388826876] [2024-11-13 14:09:44,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:44,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:09:44,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:09:44,223 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:09:44,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 14:09:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:44,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-13 14:09:44,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:09:44,353 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 14:09:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:09:44,488 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:09:44,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:09:44,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388826876] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:09:44,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:09:44,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2024-11-13 14:09:44,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297075413] [2024-11-13 14:09:44,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:09:44,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 14:09:44,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:44,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 14:09:44,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2024-11-13 14:09:44,749 INFO L87 Difference]: Start difference. First operand 96 states and 113 transitions. Second operand has 22 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:45,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:45,100 INFO L93 Difference]: Finished difference Result 110 states and 125 transitions. [2024-11-13 14:09:45,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 14:09:45,101 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-13 14:09:45,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:45,102 INFO L225 Difference]: With dead ends: 110 [2024-11-13 14:09:45,102 INFO L226 Difference]: Without dead ends: 96 [2024-11-13 14:09:45,103 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2024-11-13 14:09:45,103 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 25 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:45,104 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 218 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 14:09:45,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-13 14:09:45,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 87. [2024-11-13 14:09:45,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 86 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 14:09:45,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2024-11-13 14:09:45,108 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 23 [2024-11-13 14:09:45,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:45,108 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2024-11-13 14:09:45,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:45,108 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2024-11-13 14:09:45,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-13 14:09:45,109 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:45,109 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, 1, 1] [2024-11-13 14:09:45,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 14:09:45,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:09:45,310 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:45,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:45,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1448072934, now seen corresponding path program 1 times [2024-11-13 14:09:45,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:45,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61027693] [2024-11-13 14:09:45,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:45,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:45,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:09:45,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:45,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61027693] [2024-11-13 14:09:45,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61027693] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:09:45,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76700539] [2024-11-13 14:09:45,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:45,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:09:45,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:09:45,626 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:09:45,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 14:09:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:45,761 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-13 14:09:45,763 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:09:45,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:09:45,919 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:09:46,144 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 14:09:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:09:46,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76700539] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:09:46,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:09:46,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-11-13 14:09:46,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53084333] [2024-11-13 14:09:46,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:09:46,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-13 14:09:46,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:46,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-13 14:09:46,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-11-13 14:09:46,189 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:46,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:46,541 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2024-11-13 14:09:46,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 14:09:46,542 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 14:09:46,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:46,543 INFO L225 Difference]: With dead ends: 96 [2024-11-13 14:09:46,543 INFO L226 Difference]: Without dead ends: 96 [2024-11-13 14:09:46,544 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2024-11-13 14:09:46,545 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:46,545 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 213 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 14:09:46,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-13 14:09:46,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2024-11-13 14:09:46,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 90 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:46,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 105 transitions. [2024-11-13 14:09:46,553 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 105 transitions. Word has length 24 [2024-11-13 14:09:46,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:46,553 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 105 transitions. [2024-11-13 14:09:46,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:46,553 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 105 transitions. [2024-11-13 14:09:46,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-13 14:09:46,554 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:46,554 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] [2024-11-13 14:09:46,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 14:09:46,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-13 14:09:46,755 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:46,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:46,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1940588019, now seen corresponding path program 1 times [2024-11-13 14:09:46,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:46,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194024867] [2024-11-13 14:09:46,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:46,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:47,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:09:47,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:47,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194024867] [2024-11-13 14:09:47,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194024867] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:09:47,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272124387] [2024-11-13 14:09:47,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:47,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:09:47,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:09:47,229 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:09:47,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 14:09:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:47,362 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-13 14:09:47,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:09:47,442 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 14:09:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:09:48,182 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:09:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:09:48,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272124387] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:09:48,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:09:48,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2024-11-13 14:09:48,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489246355] [2024-11-13 14:09:48,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:09:48,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-13 14:09:48,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:48,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-13 14:09:48,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2024-11-13 14:09:48,813 INFO L87 Difference]: Start difference. First operand 91 states and 105 transitions. Second operand has 30 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:49,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:49,717 INFO L93 Difference]: Finished difference Result 115 states and 129 transitions. [2024-11-13 14:09:49,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 14:09:49,718 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-13 14:09:49,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:49,719 INFO L225 Difference]: With dead ends: 115 [2024-11-13 14:09:49,719 INFO L226 Difference]: Without dead ends: 115 [2024-11-13 14:09:49,720 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2024-11-13 14:09:49,721 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 27 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:49,721 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 178 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 14:09:49,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-13 14:09:49,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 103. [2024-11-13 14:09:49,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 100 states have (on average 1.18) internal successors, (118), 102 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 14:09:49,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2024-11-13 14:09:49,728 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 25 [2024-11-13 14:09:49,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:49,729 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2024-11-13 14:09:49,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:49,729 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2024-11-13 14:09:49,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-13 14:09:49,730 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:49,730 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 14:09:49,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-13 14:09:49,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-13 14:09:49,931 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:49,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:49,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1299818055, now seen corresponding path program 3 times [2024-11-13 14:09:49,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:49,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134109734] [2024-11-13 14:09:49,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:49,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:49,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:50,411 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 14:09:50,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:50,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134109734] [2024-11-13 14:09:50,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134109734] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:09:50,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757062243] [2024-11-13 14:09:50,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:09:50,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:09:50,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:09:50,415 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:09:50,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 14:09:50,548 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-13 14:09:50,549 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:09:50,551 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-13 14:09:50,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:09:50,700 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 14:09:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:09:50,858 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:09:50,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 14:09:50,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 14:09:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:09:50,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757062243] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:09:50,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:09:50,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2024-11-13 14:09:50,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023092278] [2024-11-13 14:09:50,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:09:50,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-13 14:09:50,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:50,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-13 14:09:50,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2024-11-13 14:09:50,993 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 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 14:09:52,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:52,126 INFO L93 Difference]: Finished difference Result 172 states and 192 transitions. [2024-11-13 14:09:52,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-13 14:09:52,127 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 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) Word has length 26 [2024-11-13 14:09:52,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:52,128 INFO L225 Difference]: With dead ends: 172 [2024-11-13 14:09:52,128 INFO L226 Difference]: Without dead ends: 162 [2024-11-13 14:09:52,129 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2024-11-13 14:09:52,130 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 75 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:52,130 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 374 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 14:09:52,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-11-13 14:09:52,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 123. [2024-11-13 14:09:52,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 120 states have (on average 1.1833333333333333) internal successors, (142), 122 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:09:52,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 142 transitions. [2024-11-13 14:09:52,135 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 142 transitions. Word has length 26 [2024-11-13 14:09:52,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:52,136 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 142 transitions. [2024-11-13 14:09:52,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 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 14:09:52,136 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 142 transitions. [2024-11-13 14:09:52,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-13 14:09:52,137 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:52,137 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:09:52,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-13 14:09:52,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-13 14:09:52,341 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:52,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:52,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1797901294, now seen corresponding path program 2 times [2024-11-13 14:09:52,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:52,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807398759] [2024-11-13 14:09:52,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:52,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:52,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:09:52,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:52,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807398759] [2024-11-13 14:09:52,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807398759] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:09:52,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590607407] [2024-11-13 14:09:52,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:09:52,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:09:52,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:09:52,760 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:09:52,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 14:09:52,907 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:09:52,908 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:09:52,914 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-13 14:09:52,917 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:09:53,042 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 14:09:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:09:53,299 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:09:53,534 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 14:09:53,538 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 24 treesize of output 20 [2024-11-13 14:09:53,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:09:53,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590607407] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:09:53,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:09:53,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2024-11-13 14:09:53,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029752736] [2024-11-13 14:09:53,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:09:53,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-13 14:09:53,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:53,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-13 14:09:53,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2024-11-13 14:09:53,798 INFO L87 Difference]: Start difference. First operand 123 states and 142 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 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 14:09:54,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:09:54,112 INFO L93 Difference]: Finished difference Result 208 states and 238 transitions. [2024-11-13 14:09:54,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 14:09:54,113 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 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 28 [2024-11-13 14:09:54,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:09:54,114 INFO L225 Difference]: With dead ends: 208 [2024-11-13 14:09:54,114 INFO L226 Difference]: Without dead ends: 176 [2024-11-13 14:09:54,115 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2024-11-13 14:09:54,115 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 14:09:54,116 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 534 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 14:09:54,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-11-13 14:09:54,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 170. [2024-11-13 14:09:54,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 167 states have (on average 1.1676646706586826) internal successors, (195), 169 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 14:09:54,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 195 transitions. [2024-11-13 14:09:54,126 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 195 transitions. Word has length 28 [2024-11-13 14:09:54,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:09:54,126 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 195 transitions. [2024-11-13 14:09:54,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 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 14:09:54,126 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 195 transitions. [2024-11-13 14:09:54,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-13 14:09:54,127 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:09:54,127 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 14:09:54,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 14:09:54,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-13 14:09:54,331 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:09:54,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:09:54,332 INFO L85 PathProgramCache]: Analyzing trace with hash 39870640, now seen corresponding path program 4 times [2024-11-13 14:09:54,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:09:54,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457245052] [2024-11-13 14:09:54,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:09:54,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:09:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:09:54,841 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 14:09:54,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:09:54,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457245052] [2024-11-13 14:09:54,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457245052] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:09:54,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323262135] [2024-11-13 14:09:54,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:09:54,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:09:54,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:09:54,844 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:09:54,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 14:09:54,973 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:09:54,973 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:09:54,977 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-13 14:09:54,982 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:09:55,191 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 14:09:56,645 INFO L349 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2024-11-13 14:09:56,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 34 [2024-11-13 14:09:56,675 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 15 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:09:56,675 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:09:57,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2024-11-13 14:09:57,140 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:09:57,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 45 [2024-11-13 14:09:57,459 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:09:57,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323262135] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:09:57,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:09:57,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 42 [2024-11-13 14:09:57,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872457046] [2024-11-13 14:09:57,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:09:57,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-13 14:09:57,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:09:57,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-13 14:09:57,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1551, Unknown=1, NotChecked=0, Total=1722 [2024-11-13 14:09:57,462 INFO L87 Difference]: Start difference. First operand 170 states and 195 transitions. Second operand has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 42 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 14:10:01,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:10:01,200 INFO L93 Difference]: Finished difference Result 289 states and 324 transitions. [2024-11-13 14:10:01,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-13 14:10:01,200 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 42 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-11-13 14:10:01,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:10:01,204 INFO L225 Difference]: With dead ends: 289 [2024-11-13 14:10:01,205 INFO L226 Difference]: Without dead ends: 277 [2024-11-13 14:10:01,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=507, Invalid=4601, Unknown=4, NotChecked=0, Total=5112 [2024-11-13 14:10:01,207 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 117 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 1506 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-13 14:10:01,207 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 483 Invalid, 1523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1506 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-13 14:10:01,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2024-11-13 14:10:01,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 205. [2024-11-13 14:10:01,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 202 states have (on average 1.1782178217821782) internal successors, (238), 204 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 14:10:01,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 238 transitions. [2024-11-13 14:10:01,218 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 238 transitions. Word has length 31 [2024-11-13 14:10:01,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:10:01,218 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 238 transitions. [2024-11-13 14:10:01,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 42 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 14:10:01,218 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 238 transitions. [2024-11-13 14:10:01,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-13 14:10:01,219 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:10:01,219 INFO L215 NwaCegarLoop]: trace histogram [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 14:10:01,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 14:10:01,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-13 14:10:01,424 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:10:01,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:10:01,424 INFO L85 PathProgramCache]: Analyzing trace with hash 778805584, now seen corresponding path program 3 times [2024-11-13 14:10:01,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:10:01,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508738194] [2024-11-13 14:10:01,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:10:01,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:10:01,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:10:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:10:01,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:10:01,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508738194] [2024-11-13 14:10:01,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508738194] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:10:01,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465207859] [2024-11-13 14:10:01,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:10:01,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:10:01,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:10:01,763 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:10:01,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 14:10:01,946 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 14:10:01,946 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:10:01,948 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-13 14:10:01,950 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:10:02,184 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:10:02,184 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:10:02,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-13 14:10:02,542 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:10:02,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465207859] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:10:02,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:10:02,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2024-11-13 14:10:02,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118946451] [2024-11-13 14:10:02,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:10:02,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-13 14:10:02,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:10:02,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-13 14:10:02,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2024-11-13 14:10:02,545 INFO L87 Difference]: Start difference. First operand 205 states and 238 transitions. Second operand has 24 states, 23 states have (on average 3.260869565217391) internal successors, (75), 24 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 14:10:02,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:10:02,983 INFO L93 Difference]: Finished difference Result 212 states and 243 transitions. [2024-11-13 14:10:02,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 14:10:02,984 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.260869565217391) internal successors, (75), 24 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) Word has length 31 [2024-11-13 14:10:02,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:10:02,985 INFO L225 Difference]: With dead ends: 212 [2024-11-13 14:10:02,985 INFO L226 Difference]: Without dead ends: 212 [2024-11-13 14:10:02,986 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2024-11-13 14:10:02,986 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 14:10:02,986 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 344 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 14:10:02,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2024-11-13 14:10:02,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 210. [2024-11-13 14:10:02,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 207 states have (on average 1.173913043478261) internal successors, (243), 209 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:10:02,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 243 transitions. [2024-11-13 14:10:02,997 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 243 transitions. Word has length 31 [2024-11-13 14:10:02,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:10:02,997 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 243 transitions. [2024-11-13 14:10:02,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.260869565217391) internal successors, (75), 24 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 14:10:02,998 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 243 transitions. [2024-11-13 14:10:02,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-13 14:10:03,001 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:10:03,002 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:10:03,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 14:10:03,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-13 14:10:03,203 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:10:03,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:10:03,204 INFO L85 PathProgramCache]: Analyzing trace with hash -500805288, now seen corresponding path program 4 times [2024-11-13 14:10:03,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:10:03,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631655754] [2024-11-13 14:10:03,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:10:03,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:10:03,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:10:03,772 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:10:03,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:10:03,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631655754] [2024-11-13 14:10:03,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631655754] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:10:03,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633866676] [2024-11-13 14:10:03,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:10:03,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:10:03,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:10:03,775 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:10:03,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 14:10:03,931 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:10:03,931 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:10:03,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-13 14:10:03,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:10:03,977 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 14:10:05,020 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2024-11-13 14:10:05,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 39 [2024-11-13 14:10:05,211 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:10:05,211 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:10:06,061 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 14:10:06,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2024-11-13 14:10:06,078 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 14:10:06,104 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:10:06,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633866676] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:10:06,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:10:06,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2024-11-13 14:10:06,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717917605] [2024-11-13 14:10:06,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:10:06,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-13 14:10:06,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:10:06,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-13 14:10:06,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1326, Unknown=0, NotChecked=0, Total=1482 [2024-11-13 14:10:06,107 INFO L87 Difference]: Start difference. First operand 210 states and 243 transitions. Second operand has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:10:07,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:10:07,681 INFO L93 Difference]: Finished difference Result 318 states and 367 transitions. [2024-11-13 14:10:07,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-13 14:10:07,682 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-13 14:10:07,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:10:07,683 INFO L225 Difference]: With dead ends: 318 [2024-11-13 14:10:07,683 INFO L226 Difference]: Without dead ends: 298 [2024-11-13 14:10:07,684 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=325, Invalid=2645, Unknown=0, NotChecked=0, Total=2970 [2024-11-13 14:10:07,684 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 14:10:07,684 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 342 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 14:10:07,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2024-11-13 14:10:07,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 266. [2024-11-13 14:10:07,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 264 states have (on average 1.1818181818181819) internal successors, (312), 265 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:10:07,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 312 transitions. [2024-11-13 14:10:07,692 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 312 transitions. Word has length 35 [2024-11-13 14:10:07,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:10:07,692 INFO L471 AbstractCegarLoop]: Abstraction has 266 states and 312 transitions. [2024-11-13 14:10:07,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:10:07,693 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 312 transitions. [2024-11-13 14:10:07,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-13 14:10:07,694 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:10:07,694 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:10:07,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 14:10:07,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-11-13 14:10:07,895 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:10:07,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:10:07,895 INFO L85 PathProgramCache]: Analyzing trace with hash -987363417, now seen corresponding path program 1 times [2024-11-13 14:10:07,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:10:07,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346509136] [2024-11-13 14:10:07,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:10:07,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:10:07,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:10:08,484 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:10:08,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:10:08,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346509136] [2024-11-13 14:10:08,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346509136] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:10:08,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043935901] [2024-11-13 14:10:08,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:10:08,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:10:08,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:10:08,488 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:10:08,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 14:10:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:10:08,644 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-13 14:10:08,647 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:10:08,702 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 14:10:08,721 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 14:10:09,955 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:10:09,955 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:10:10,809 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:10:10,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043935901] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:10:10,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:10:10,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 17] total 45 [2024-11-13 14:10:10,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766690607] [2024-11-13 14:10:10,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:10:10,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-13 14:10:10,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:10:10,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-13 14:10:10,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1830, Unknown=0, NotChecked=0, Total=2070 [2024-11-13 14:10:10,813 INFO L87 Difference]: Start difference. First operand 266 states and 312 transitions. Second operand has 46 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 46 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:10:12,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:10:12,673 INFO L93 Difference]: Finished difference Result 343 states and 387 transitions. [2024-11-13 14:10:12,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-13 14:10:12,674 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 46 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-13 14:10:12,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:10:12,675 INFO L225 Difference]: With dead ends: 343 [2024-11-13 14:10:12,675 INFO L226 Difference]: Without dead ends: 271 [2024-11-13 14:10:12,676 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=462, Invalid=3444, Unknown=0, NotChecked=0, Total=3906 [2024-11-13 14:10:12,676 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 106 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 1465 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:10:12,676 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 459 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1465 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-13 14:10:12,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2024-11-13 14:10:12,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 234. [2024-11-13 14:10:12,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 232 states have (on average 1.1508620689655173) internal successors, (267), 233 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 14:10:12,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 267 transitions. [2024-11-13 14:10:12,685 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 267 transitions. Word has length 35 [2024-11-13 14:10:12,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:10:12,686 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 267 transitions. [2024-11-13 14:10:12,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 46 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:10:12,686 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 267 transitions. [2024-11-13 14:10:12,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-13 14:10:12,687 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:10:12,687 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 14:10:12,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 14:10:12,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:10:12,892 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:10:12,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:10:12,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1456099819, now seen corresponding path program 5 times [2024-11-13 14:10:12,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:10:12,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104951204] [2024-11-13 14:10:12,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:10:12,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:10:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:10:13,558 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 14:10:13,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:10:13,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104951204] [2024-11-13 14:10:13,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104951204] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:10:13,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21273772] [2024-11-13 14:10:13,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 14:10:13,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:10:13,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:10:13,561 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:10:13,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 14:10:13,732 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-13 14:10:13,733 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:10:13,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-13 14:10:13,738 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:10:13,753 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 14:10:14,000 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 14:10:14,561 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:10:14,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2024-11-13 14:10:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:10:14,625 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:10:15,197 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 14:10:15,206 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 14:10:16,028 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:10:16,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21273772] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:10:16,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:10:16,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 43 [2024-11-13 14:10:16,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223036902] [2024-11-13 14:10:16,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:10:16,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-13 14:10:16,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:10:16,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-13 14:10:16,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1688, Unknown=0, NotChecked=0, Total=1892 [2024-11-13 14:10:16,031 INFO L87 Difference]: Start difference. First operand 234 states and 267 transitions. Second operand has 44 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 44 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:10:19,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 14:10:19,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:10:19,876 INFO L93 Difference]: Finished difference Result 304 states and 343 transitions. [2024-11-13 14:10:19,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-13 14:10:19,877 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 44 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-13 14:10:19,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:10:19,878 INFO L225 Difference]: With dead ends: 304 [2024-11-13 14:10:19,878 INFO L226 Difference]: Without dead ends: 304 [2024-11-13 14:10:19,879 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=367, Invalid=2713, Unknown=0, NotChecked=0, Total=3080 [2024-11-13 14:10:19,880 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 130 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-13 14:10:19,880 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 474 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1175 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-13 14:10:19,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2024-11-13 14:10:19,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 242. [2024-11-13 14:10:19,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 240 states have (on average 1.1583333333333334) internal successors, (278), 241 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:10:19,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 278 transitions. [2024-11-13 14:10:19,891 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 278 transitions. Word has length 36 [2024-11-13 14:10:19,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:10:19,891 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 278 transitions. [2024-11-13 14:10:19,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 44 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:10:19,891 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 278 transitions. [2024-11-13 14:10:19,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-13 14:10:19,892 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:10:19,892 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:10:19,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-13 14:10:20,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:10:20,093 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:10:20,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:10:20,093 INFO L85 PathProgramCache]: Analyzing trace with hash -847411964, now seen corresponding path program 6 times [2024-11-13 14:10:20,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:10:20,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974307215] [2024-11-13 14:10:20,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:10:20,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:10:20,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:10:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:10:20,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:10:20,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974307215] [2024-11-13 14:10:20,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974307215] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:10:20,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311641057] [2024-11-13 14:10:20,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 14:10:20,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:10:20,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:10:20,627 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:10:20,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 14:10:20,823 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-13 14:10:20,823 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:10:20,826 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-13 14:10:20,829 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:10:21,027 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 14:10:21,116 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:10:21,116 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:10:21,151 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 14:10:21,154 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 14:10:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:10:21,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311641057] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:10:21,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:10:21,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 28 [2024-11-13 14:10:21,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158272289] [2024-11-13 14:10:21,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:10:21,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-13 14:10:21,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:10:21,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-13 14:10:21,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2024-11-13 14:10:21,273 INFO L87 Difference]: Start difference. First operand 242 states and 278 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 28 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 14:10:22,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:10:22,109 INFO L93 Difference]: Finished difference Result 336 states and 380 transitions. [2024-11-13 14:10:22,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-13 14:10:22,110 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-11-13 14:10:22,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:10:22,111 INFO L225 Difference]: With dead ends: 336 [2024-11-13 14:10:22,111 INFO L226 Difference]: Without dead ends: 322 [2024-11-13 14:10:22,112 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2024-11-13 14:10:22,113 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 36 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 14:10:22,113 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 474 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 14:10:22,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2024-11-13 14:10:22,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 296. [2024-11-13 14:10:22,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 294 states have (on average 1.1564625850340136) internal successors, (340), 295 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:10:22,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 340 transitions. [2024-11-13 14:10:22,121 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 340 transitions. Word has length 38 [2024-11-13 14:10:22,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:10:22,121 INFO L471 AbstractCegarLoop]: Abstraction has 296 states and 340 transitions. [2024-11-13 14:10:22,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 28 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 14:10:22,122 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 340 transitions. [2024-11-13 14:10:22,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-13 14:10:22,123 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:10:22,123 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:10:22,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-13 14:10:22,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-13 14:10:22,327 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:10:22,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:10:22,327 INFO L85 PathProgramCache]: Analyzing trace with hash 124988707, now seen corresponding path program 2 times [2024-11-13 14:10:22,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:10:22,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572795811] [2024-11-13 14:10:22,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:10:22,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:10:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:10:23,064 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:10:23,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:10:23,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572795811] [2024-11-13 14:10:23,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572795811] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:10:23,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232844778] [2024-11-13 14:10:23,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:10:23,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:10:23,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:10:23,068 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:10:23,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 14:10:23,239 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:10:23,239 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:10:23,242 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-13 14:10:23,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:10:23,319 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 14:10:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:10:24,527 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:10:25,488 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:10:25,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232844778] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:10:25,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:10:25,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 44 [2024-11-13 14:10:25,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923764540] [2024-11-13 14:10:25,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:10:25,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-13 14:10:25,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:10:25,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-13 14:10:25,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1754, Unknown=0, NotChecked=0, Total=1980 [2024-11-13 14:10:25,491 INFO L87 Difference]: Start difference. First operand 296 states and 340 transitions. Second operand has 45 states, 44 states have (on average 2.6136363636363638) internal successors, (115), 45 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:10:26,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:10:26,898 INFO L93 Difference]: Finished difference Result 349 states and 396 transitions. [2024-11-13 14:10:26,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-13 14:10:26,899 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.6136363636363638) internal successors, (115), 45 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have 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 14:10:26,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:10:26,900 INFO L225 Difference]: With dead ends: 349 [2024-11-13 14:10:26,900 INFO L226 Difference]: Without dead ends: 349 [2024-11-13 14:10:26,901 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=356, Invalid=2836, Unknown=0, NotChecked=0, Total=3192 [2024-11-13 14:10:26,902 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 54 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-13 14:10:26,902 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 442 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-13 14:10:26,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-11-13 14:10:26,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 302. [2024-11-13 14:10:26,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 300 states have (on average 1.1566666666666667) internal successors, (347), 301 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:10:26,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 347 transitions. [2024-11-13 14:10:26,912 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 347 transitions. Word has length 39 [2024-11-13 14:10:26,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:10:26,912 INFO L471 AbstractCegarLoop]: Abstraction has 302 states and 347 transitions. [2024-11-13 14:10:26,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.6136363636363638) internal successors, (115), 45 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:10:26,913 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 347 transitions. [2024-11-13 14:10:26,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-13 14:10:26,914 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:10:26,914 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 14:10:26,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-13 14:10:27,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:10:27,115 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:10:27,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:10:27,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1511651042, now seen corresponding path program 7 times [2024-11-13 14:10:27,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:10:27,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91823718] [2024-11-13 14:10:27,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:10:27,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:10:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:10:27,891 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 14:10:27,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:10:27,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91823718] [2024-11-13 14:10:27,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91823718] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:10:27,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34722172] [2024-11-13 14:10:27,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 14:10:27,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:10:27,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:10:27,894 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:10:27,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-13 14:10:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:10:28,063 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-13 14:10:28,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:10:28,307 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 14:10:28,651 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 14:10:28,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:10:28,691 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 14:10:28,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 14:10:28,850 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 14:10:28,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34722172] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:10:28,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:10:28,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 37 [2024-11-13 14:10:28,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095891541] [2024-11-13 14:10:28,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:10:28,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-13 14:10:28,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:10:28,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-13 14:10:28,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1243, Unknown=0, NotChecked=0, Total=1332 [2024-11-13 14:10:28,853 INFO L87 Difference]: Start difference. First operand 302 states and 347 transitions. Second operand has 37 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 37 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 14:10:30,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:10:30,963 INFO L93 Difference]: Finished difference Result 485 states and 548 transitions. [2024-11-13 14:10:30,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-13 14:10:30,964 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 37 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 41 [2024-11-13 14:10:30,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:10:30,965 INFO L225 Difference]: With dead ends: 485 [2024-11-13 14:10:30,966 INFO L226 Difference]: Without dead ends: 469 [2024-11-13 14:10:30,967 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=264, Invalid=3276, Unknown=0, NotChecked=0, Total=3540 [2024-11-13 14:10:30,968 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 117 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1805 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:10:30,968 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 699 Invalid, 1829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1805 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-13 14:10:30,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2024-11-13 14:10:30,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 364. [2024-11-13 14:10:30,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 362 states have (on average 1.1685082872928176) internal successors, (423), 363 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:10:30,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 423 transitions. [2024-11-13 14:10:30,980 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 423 transitions. Word has length 41 [2024-11-13 14:10:30,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:10:30,980 INFO L471 AbstractCegarLoop]: Abstraction has 364 states and 423 transitions. [2024-11-13 14:10:30,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 37 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 14:10:30,981 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 423 transitions. [2024-11-13 14:10:30,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-13 14:10:30,982 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:10:30,982 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 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 14:10:31,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-13 14:10:31,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-13 14:10:31,183 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:10:31,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:10:31,184 INFO L85 PathProgramCache]: Analyzing trace with hash 2114528601, now seen corresponding path program 2 times [2024-11-13 14:10:31,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:10:31,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49948206] [2024-11-13 14:10:31,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:10:31,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:10:31,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:10:31,960 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:10:31,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:10:31,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49948206] [2024-11-13 14:10:31,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49948206] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:10:31,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789012473] [2024-11-13 14:10:31,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:10:31,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:10:31,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:10:31,963 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:10:31,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-13 14:10:32,134 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:10:32,134 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:10:32,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-13 14:10:32,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:10:32,212 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 14:10:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:10:34,074 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:10:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:10:35,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789012473] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:10:35,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:10:35,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 21] total 57 [2024-11-13 14:10:35,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063889065] [2024-11-13 14:10:35,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:10:35,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-13 14:10:35,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:10:35,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-13 14:10:35,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=2946, Unknown=0, NotChecked=0, Total=3306 [2024-11-13 14:10:35,688 INFO L87 Difference]: Start difference. First operand 364 states and 423 transitions. Second operand has 58 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 58 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:10:38,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:10:38,831 INFO L93 Difference]: Finished difference Result 470 states and 527 transitions. [2024-11-13 14:10:38,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-13 14:10:38,831 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 58 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-11-13 14:10:38,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:10:38,833 INFO L225 Difference]: With dead ends: 470 [2024-11-13 14:10:38,833 INFO L226 Difference]: Without dead ends: 401 [2024-11-13 14:10:38,835 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1867 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=664, Invalid=5816, Unknown=0, NotChecked=0, Total=6480 [2024-11-13 14:10:38,835 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 107 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 2210 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 2233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-13 14:10:38,836 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 647 Invalid, 2233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2210 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-13 14:10:38,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2024-11-13 14:10:38,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 312. [2024-11-13 14:10:38,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 310 states have (on average 1.1451612903225807) internal successors, (355), 311 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:10:38,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 355 transitions. [2024-11-13 14:10:38,846 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 355 transitions. Word has length 45 [2024-11-13 14:10:38,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:10:38,846 INFO L471 AbstractCegarLoop]: Abstraction has 312 states and 355 transitions. [2024-11-13 14:10:38,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 58 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:10:38,846 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 355 transitions. [2024-11-13 14:10:38,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-13 14:10:38,847 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:10:38,847 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 14:10:38,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-13 14:10:39,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-13 14:10:39,049 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:10:39,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:10:39,049 INFO L85 PathProgramCache]: Analyzing trace with hash 2127417629, now seen corresponding path program 8 times [2024-11-13 14:10:39,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:10:39,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472975686] [2024-11-13 14:10:39,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:10:39,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:10:39,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:10:39,925 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 14:10:39,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:10:39,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472975686] [2024-11-13 14:10:39,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472975686] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:10:39,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780049790] [2024-11-13 14:10:39,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:10:39,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:10:39,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:10:39,928 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:10:39,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-13 14:10:40,110 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:10:40,110 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:10:40,113 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-13 14:10:40,115 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:10:40,454 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 14:10:40,838 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 14:10:40,838 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:10:40,874 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 14:10:40,881 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 16 treesize of output 12 [2024-11-13 14:10:41,055 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 14:10:41,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780049790] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:10:41,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:10:41,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 41 [2024-11-13 14:10:41,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509164278] [2024-11-13 14:10:41,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:10:41,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-13 14:10:41,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:10:41,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-13 14:10:41,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1539, Unknown=0, NotChecked=0, Total=1640 [2024-11-13 14:10:41,058 INFO L87 Difference]: Start difference. First operand 312 states and 355 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 41 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:10:44,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:10:44,010 INFO L93 Difference]: Finished difference Result 486 states and 545 transitions. [2024-11-13 14:10:44,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-13 14:10:44,010 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 41 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-13 14:10:44,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:10:44,012 INFO L225 Difference]: With dead ends: 486 [2024-11-13 14:10:44,012 INFO L226 Difference]: Without dead ends: 468 [2024-11-13 14:10:44,013 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=304, Invalid=4118, Unknown=0, NotChecked=0, Total=4422 [2024-11-13 14:10:44,014 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 128 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 2820 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 2848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-13 14:10:44,014 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 1055 Invalid, 2848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2820 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-13 14:10:44,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2024-11-13 14:10:44,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 386. [2024-11-13 14:10:44,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 384 states have (on average 1.1510416666666667) internal successors, (442), 385 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:10:44,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 442 transitions. [2024-11-13 14:10:44,024 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 442 transitions. Word has length 46 [2024-11-13 14:10:44,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:10:44,025 INFO L471 AbstractCegarLoop]: Abstraction has 386 states and 442 transitions. [2024-11-13 14:10:44,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 41 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:10:44,025 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 442 transitions. [2024-11-13 14:10:44,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-13 14:10:44,026 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:10:44,026 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:10:44,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-13 14:10:44,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:10:44,227 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:10:44,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:10:44,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1420584685, now seen corresponding path program 3 times [2024-11-13 14:10:44,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:10:44,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179507557] [2024-11-13 14:10:44,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:10:44,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:10:44,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:10:45,093 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 41 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:10:45,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:10:45,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179507557] [2024-11-13 14:10:45,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179507557] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:10:45,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686543580] [2024-11-13 14:10:45,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:10:45,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:10:45,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:10:45,096 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:10:45,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-13 14:10:45,355 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-13 14:10:45,356 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:10:45,358 INFO L255 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-11-13 14:10:45,361 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:10:45,630 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 14:10:46,015 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:10:46,015 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:10:46,298 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 14:10:46,300 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 14:10:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:10:46,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686543580] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:10:46,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:10:46,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 42 [2024-11-13 14:10:46,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311805058] [2024-11-13 14:10:46,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:10:46,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-13 14:10:46,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:10:46,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-13 14:10:46,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1606, Unknown=0, NotChecked=0, Total=1722 [2024-11-13 14:10:46,585 INFO L87 Difference]: Start difference. First operand 386 states and 442 transitions. Second operand has 42 states, 42 states have (on average 2.8333333333333335) internal successors, (119), 42 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:10:48,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:10:48,191 INFO L93 Difference]: Finished difference Result 641 states and 726 transitions. [2024-11-13 14:10:48,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-13 14:10:48,191 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.8333333333333335) internal successors, (119), 42 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have 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 14:10:48,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:10:48,193 INFO L225 Difference]: With dead ends: 641 [2024-11-13 14:10:48,193 INFO L226 Difference]: Without dead ends: 547 [2024-11-13 14:10:48,194 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=270, Invalid=3762, Unknown=0, NotChecked=0, Total=4032 [2024-11-13 14:10:48,194 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 32 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 14:10:48,194 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 541 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 14:10:48,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2024-11-13 14:10:48,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 507. [2024-11-13 14:10:48,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 505 states have (on average 1.1465346534653464) internal successors, (579), 506 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:10:48,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 579 transitions. [2024-11-13 14:10:48,203 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 579 transitions. Word has length 47 [2024-11-13 14:10:48,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:10:48,204 INFO L471 AbstractCegarLoop]: Abstraction has 507 states and 579 transitions. [2024-11-13 14:10:48,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.8333333333333335) internal successors, (119), 42 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:10:48,204 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 579 transitions. [2024-11-13 14:10:48,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-13 14:10:48,205 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:10:48,205 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:10:48,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-13 14:10:48,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:10:48,406 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:10:48,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:10:48,406 INFO L85 PathProgramCache]: Analyzing trace with hash -115782476, now seen corresponding path program 3 times [2024-11-13 14:10:48,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:10:48,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602698990] [2024-11-13 14:10:48,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:10:48,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:10:48,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:10:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:10:49,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:10:49,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602698990] [2024-11-13 14:10:49,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602698990] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:10:49,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836236110] [2024-11-13 14:10:49,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:10:49,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:10:49,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:10:49,217 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:10:49,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-13 14:10:49,413 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-13 14:10:49,413 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:10:49,416 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-13 14:10:49,419 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:10:49,466 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 14:10:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:10:50,837 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:10:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:10:52,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836236110] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:10:52,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:10:52,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 48 [2024-11-13 14:10:52,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367178152] [2024-11-13 14:10:52,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:10:52,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-13 14:10:52,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:10:52,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-13 14:10:52,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2109, Unknown=0, NotChecked=0, Total=2352 [2024-11-13 14:10:52,039 INFO L87 Difference]: Start difference. First operand 507 states and 579 transitions. Second operand has 49 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 49 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:10:55,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:10:55,293 INFO L93 Difference]: Finished difference Result 652 states and 728 transitions. [2024-11-13 14:10:55,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-13 14:10:55,294 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 49 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-11-13 14:10:55,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:10:55,296 INFO L225 Difference]: With dead ends: 652 [2024-11-13 14:10:55,296 INFO L226 Difference]: Without dead ends: 598 [2024-11-13 14:10:55,296 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1381 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=571, Invalid=5281, Unknown=0, NotChecked=0, Total=5852 [2024-11-13 14:10:55,297 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 73 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 2254 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 2277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-13 14:10:55,297 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 691 Invalid, 2277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2254 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-13 14:10:55,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2024-11-13 14:10:55,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 503. [2024-11-13 14:10:55,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 501 states have (on average 1.1477045908183632) internal successors, (575), 502 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:10:55,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 575 transitions. [2024-11-13 14:10:55,310 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 575 transitions. Word has length 47 [2024-11-13 14:10:55,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:10:55,310 INFO L471 AbstractCegarLoop]: Abstraction has 503 states and 575 transitions. [2024-11-13 14:10:55,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 49 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:10:55,310 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 575 transitions. [2024-11-13 14:10:55,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 14:10:55,312 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:10:55,312 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:10:55,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-13 14:10:55,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-13 14:10:55,513 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:10:55,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:10:55,513 INFO L85 PathProgramCache]: Analyzing trace with hash 833995095, now seen corresponding path program 4 times [2024-11-13 14:10:55,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:10:55,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677982371] [2024-11-13 14:10:55,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:10:55,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:10:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:10:56,518 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:10:56,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:10:56,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677982371] [2024-11-13 14:10:56,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677982371] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:10:56,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747155913] [2024-11-13 14:10:56,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:10:56,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:10:56,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:10:56,523 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:10:56,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-13 14:10:56,832 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:10:56,832 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:10:56,835 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-11-13 14:10:56,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:10:56,892 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 14:10:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:10:58,761 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:11:00,708 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:11:00,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747155913] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:11:00,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:11:00,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 21] total 57 [2024-11-13 14:11:00,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488004012] [2024-11-13 14:11:00,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:11:00,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-13 14:11:00,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:11:00,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-13 14:11:00,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=2978, Unknown=0, NotChecked=0, Total=3306 [2024-11-13 14:11:00,710 INFO L87 Difference]: Start difference. First operand 503 states and 575 transitions. Second operand has 58 states, 57 states have (on average 2.543859649122807) internal successors, (145), 58 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:11:03,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:11:03,822 INFO L93 Difference]: Finished difference Result 610 states and 684 transitions. [2024-11-13 14:11:03,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-13 14:11:03,823 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 2.543859649122807) internal successors, (145), 58 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have 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 14:11:03,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:11:03,825 INFO L225 Difference]: With dead ends: 610 [2024-11-13 14:11:03,825 INFO L226 Difference]: Without dead ends: 585 [2024-11-13 14:11:03,825 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2331 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=851, Invalid=7521, Unknown=0, NotChecked=0, Total=8372 [2024-11-13 14:11:03,826 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 143 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 2351 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 2391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-13 14:11:03,826 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 657 Invalid, 2391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2351 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-13 14:11:03,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2024-11-13 14:11:03,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 503. [2024-11-13 14:11:03,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 501 states have (on average 1.1497005988023952) internal successors, (576), 502 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:11:03,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 576 transitions. [2024-11-13 14:11:03,835 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 576 transitions. Word has length 49 [2024-11-13 14:11:03,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:11:03,836 INFO L471 AbstractCegarLoop]: Abstraction has 503 states and 576 transitions. [2024-11-13 14:11:03,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 2.543859649122807) internal successors, (145), 58 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:11:03,836 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 576 transitions. [2024-11-13 14:11:03,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 14:11:03,837 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:11:03,837 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:11:03,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-13 14:11:04,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:11:04,038 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:11:04,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:11:04,038 INFO L85 PathProgramCache]: Analyzing trace with hash -909921167, now seen corresponding path program 4 times [2024-11-13 14:11:04,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:11:04,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115874869] [2024-11-13 14:11:04,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:11:04,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:11:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:11:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 41 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:11:05,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:11:05,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115874869] [2024-11-13 14:11:05,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115874869] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:11:05,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8662684] [2024-11-13 14:11:05,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:11:05,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:11:05,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:11:05,040 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:11:05,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-13 14:11:05,314 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:11:05,315 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:11:05,318 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-11-13 14:11:05,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:11:05,661 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 14:11:06,181 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:11:06,182 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:11:06,565 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 14:11:06,567 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 14:11:06,953 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:11:06,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8662684] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:11:06,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:11:06,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 47 [2024-11-13 14:11:06,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164086097] [2024-11-13 14:11:06,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:11:06,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-13 14:11:06,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:11:06,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-13 14:11:06,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2034, Unknown=0, NotChecked=0, Total=2162 [2024-11-13 14:11:06,956 INFO L87 Difference]: Start difference. First operand 503 states and 576 transitions. Second operand has 47 states, 47 states have (on average 2.851063829787234) internal successors, (134), 47 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:11:09,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:11:09,581 INFO L93 Difference]: Finished difference Result 823 states and 929 transitions. [2024-11-13 14:11:09,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-13 14:11:09,582 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.851063829787234) internal successors, (134), 47 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-11-13 14:11:09,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:11:09,584 INFO L225 Difference]: With dead ends: 823 [2024-11-13 14:11:09,584 INFO L226 Difference]: Without dead ends: 703 [2024-11-13 14:11:09,585 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=322, Invalid=4934, Unknown=0, NotChecked=0, Total=5256 [2024-11-13 14:11:09,585 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 32 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1877 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 1887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-13 14:11:09,586 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 792 Invalid, 1887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1877 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-13 14:11:09,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2024-11-13 14:11:09,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 632. [2024-11-13 14:11:09,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 630 states have (on average 1.1492063492063491) internal successors, (724), 631 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:11:09,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 724 transitions. [2024-11-13 14:11:09,599 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 724 transitions. Word has length 50 [2024-11-13 14:11:09,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:11:09,599 INFO L471 AbstractCegarLoop]: Abstraction has 632 states and 724 transitions. [2024-11-13 14:11:09,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.851063829787234) internal successors, (134), 47 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:11:09,600 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 724 transitions. [2024-11-13 14:11:09,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-13 14:11:09,604 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:11:09,604 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 14:11:09,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-13 14:11:09,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:11:09,804 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:11:09,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:11:09,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1921764332, now seen corresponding path program 9 times [2024-11-13 14:11:09,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:11:09,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632858461] [2024-11-13 14:11:09,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:11:09,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:11:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:11:10,689 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 14:11:10,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:11:10,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632858461] [2024-11-13 14:11:10,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632858461] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:11:10,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343227613] [2024-11-13 14:11:10,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:11:10,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:11:10,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:11:10,692 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:11:10,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-13 14:11:10,903 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-13 14:11:10,904 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:11:10,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-13 14:11:10,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:11:11,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-13 14:11:12,247 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:11:12,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2024-11-13 14:11:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 51 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:11:12,432 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:11:13,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-13 14:11:13,923 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 22 treesize of output 20 [2024-11-13 14:11:13,929 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 14:11:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 51 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:11:14,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343227613] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:11:14,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:11:14,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 52 [2024-11-13 14:11:14,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130083472] [2024-11-13 14:11:14,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:11:14,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-13 14:11:14,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:11:14,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-13 14:11:14,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=2447, Unknown=0, NotChecked=0, Total=2756 [2024-11-13 14:11:14,216 INFO L87 Difference]: Start difference. First operand 632 states and 724 transitions. Second operand has 53 states, 52 states have (on average 2.3076923076923075) internal successors, (120), 53 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:11:17,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 14:11:18,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:11:18,445 INFO L93 Difference]: Finished difference Result 818 states and 923 transitions. [2024-11-13 14:11:18,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-13 14:11:18,446 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 2.3076923076923075) internal successors, (120), 53 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have 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 14:11:18,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:11:18,449 INFO L225 Difference]: With dead ends: 818 [2024-11-13 14:11:18,450 INFO L226 Difference]: Without dead ends: 818 [2024-11-13 14:11:18,451 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 63 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=582, Invalid=4388, Unknown=0, NotChecked=0, Total=4970 [2024-11-13 14:11:18,451 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 261 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 1742 mSolverCounterSat, 102 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1742 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:11:18,452 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 649 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1742 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2024-11-13 14:11:18,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2024-11-13 14:11:18,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 644. [2024-11-13 14:11:18,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 642 states have (on average 1.1542056074766356) internal successors, (741), 643 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:11:18,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 741 transitions. [2024-11-13 14:11:18,468 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 741 transitions. Word has length 51 [2024-11-13 14:11:18,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:11:18,470 INFO L471 AbstractCegarLoop]: Abstraction has 644 states and 741 transitions. [2024-11-13 14:11:18,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 2.3076923076923075) internal successors, (120), 53 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:11:18,471 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 741 transitions. [2024-11-13 14:11:18,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-13 14:11:18,472 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:11:18,472 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:11:18,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-13 14:11:18,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:11:18,673 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:11:18,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:11:18,674 INFO L85 PathProgramCache]: Analyzing trace with hash 20414701, now seen corresponding path program 10 times [2024-11-13 14:11:18,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:11:18,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268030630] [2024-11-13 14:11:18,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:11:18,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:11:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:11:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 24 proven. 126 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:11:19,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:11:19,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268030630] [2024-11-13 14:11:19,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268030630] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:11:19,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483290253] [2024-11-13 14:11:19,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:11:19,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:11:19,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:11:19,400 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:11:19,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-13 14:11:19,631 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:11:19,631 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:11:19,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-13 14:11:19,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:11:20,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-13 14:11:59,328 INFO L349 Elim1Store]: treesize reduction 33, result has 49.2 percent of original size [2024-11-13 14:11:59,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 88 treesize of output 66 [2024-11-13 14:11:59,334 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-13 14:11:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 33 proven. 77 refuted. 40 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:11:59,339 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:12:02,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 103 [2024-11-13 14:12:02,111 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:12:02,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 119 treesize of output 89 [2024-11-13 14:12:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 80 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:12:02,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483290253] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:12:02,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:12:02,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 29, 29] total 72 [2024-11-13 14:12:02,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215169856] [2024-11-13 14:12:02,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:12:02,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-11-13 14:12:02,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:12:02,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-11-13 14:12:02,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=522, Invalid=4531, Unknown=59, NotChecked=0, Total=5112 [2024-11-13 14:12:02,956 INFO L87 Difference]: Start difference. First operand 644 states and 741 transitions. Second operand has 72 states, 72 states have (on average 1.9027777777777777) internal successors, (137), 72 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:13:23,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:13:23,686 INFO L93 Difference]: Finished difference Result 876 states and 996 transitions. [2024-11-13 14:13:23,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-11-13 14:13:23,686 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.9027777777777777) internal successors, (137), 72 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2024-11-13 14:13:23,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:13:23,689 INFO L225 Difference]: With dead ends: 876 [2024-11-13 14:13:23,689 INFO L226 Difference]: Without dead ends: 856 [2024-11-13 14:13:23,690 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4741 ImplicationChecksByTransitivity, 116.4s TimeCoverageRelationStatistics Valid=1516, Invalid=13110, Unknown=136, NotChecked=0, Total=14762 [2024-11-13 14:13:23,690 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 93 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 2738 mSolverCounterSat, 32 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2738 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2024-11-13 14:13:23,690 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 777 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2738 Invalid, 5 Unknown, 0 Unchecked, 6.8s Time] [2024-11-13 14:13:23,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2024-11-13 14:13:23,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 752. [2024-11-13 14:13:23,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 750 states have (on average 1.1613333333333333) internal successors, (871), 751 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:13:23,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 871 transitions. [2024-11-13 14:13:23,702 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 871 transitions. Word has length 53 [2024-11-13 14:13:23,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:13:23,703 INFO L471 AbstractCegarLoop]: Abstraction has 752 states and 871 transitions. [2024-11-13 14:13:23,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.9027777777777777) internal successors, (137), 72 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:13:23,703 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 871 transitions. [2024-11-13 14:13:23,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-13 14:13:23,704 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:13:23,704 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:13:23,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-13 14:13:23,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-11-13 14:13:23,906 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:13:23,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:13:23,906 INFO L85 PathProgramCache]: Analyzing trace with hash -507218861, now seen corresponding path program 5 times [2024-11-13 14:13:23,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:13:23,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533593912] [2024-11-13 14:13:23,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:13:23,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:13:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:13:24,859 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 12 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:13:24,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:13:24,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533593912] [2024-11-13 14:13:24,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533593912] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:13:24,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180482815] [2024-11-13 14:13:24,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 14:13:24,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:13:24,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:13:24,861 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:13:24,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-13 14:13:25,157 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-13 14:13:25,157 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:13:25,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-13 14:13:25,165 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:13:25,248 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 14:13:25,264 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 14:13:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 22 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:13:26,901 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:13:28,324 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 35 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:13:28,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180482815] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:13:28,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:13:28,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 50 [2024-11-13 14:13:28,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321177075] [2024-11-13 14:13:28,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:13:28,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-13 14:13:28,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:13:28,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-13 14:13:28,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=2287, Unknown=0, NotChecked=0, Total=2550 [2024-11-13 14:13:28,327 INFO L87 Difference]: Start difference. First operand 752 states and 871 transitions. Second operand has 51 states, 50 states have (on average 3.14) internal successors, (157), 51 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 14:13:30,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:13:30,273 INFO L93 Difference]: Finished difference Result 825 states and 945 transitions. [2024-11-13 14:13:30,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-13 14:13:30,273 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.14) internal successors, (157), 51 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 14:13:30,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:13:30,275 INFO L225 Difference]: With dead ends: 825 [2024-11-13 14:13:30,275 INFO L226 Difference]: Without dead ends: 825 [2024-11-13 14:13:30,276 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=460, Invalid=3962, Unknown=0, NotChecked=0, Total=4422 [2024-11-13 14:13:30,276 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 51 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 1429 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:13:30,276 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 590 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1429 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-13 14:13:30,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2024-11-13 14:13:30,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 758. [2024-11-13 14:13:30,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 756 states have (on average 1.1613756613756614) internal successors, (878), 757 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:13:30,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 878 transitions. [2024-11-13 14:13:30,288 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 878 transitions. Word has length 53 [2024-11-13 14:13:30,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:13:30,288 INFO L471 AbstractCegarLoop]: Abstraction has 758 states and 878 transitions. [2024-11-13 14:13:30,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.14) internal successors, (157), 51 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 14:13:30,288 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 878 transitions. [2024-11-13 14:13:30,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-13 14:13:30,290 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:13:30,290 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 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 14:13:30,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-13 14:13:30,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-11-13 14:13:30,491 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:13:30,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:13:30,491 INFO L85 PathProgramCache]: Analyzing trace with hash 2114898443, now seen corresponding path program 5 times [2024-11-13 14:13:30,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:13:30,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010155715] [2024-11-13 14:13:30,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:13:30,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:13:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:13:31,377 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 22 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:13:31,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:13:31,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010155715] [2024-11-13 14:13:31,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010155715] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:13:31,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940344164] [2024-11-13 14:13:31,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 14:13:31,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:13:31,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:13:31,380 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:13:31,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-13 14:13:31,599 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-13 14:13:31,599 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:13:31,602 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-13 14:13:31,605 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:13:31,667 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 14:13:34,044 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 33 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:13:34,044 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:13:36,318 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 51 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:13:36,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940344164] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:13:36,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:13:36,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 23] total 67 [2024-11-13 14:13:36,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919107801] [2024-11-13 14:13:36,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:13:36,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-13 14:13:36,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:13:36,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-13 14:13:36,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=4046, Unknown=0, NotChecked=0, Total=4556 [2024-11-13 14:13:36,321 INFO L87 Difference]: Start difference. First operand 758 states and 878 transitions. Second operand has 68 states, 67 states have (on average 2.4328358208955225) internal successors, (163), 68 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:13:40,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:13:40,379 INFO L93 Difference]: Finished difference Result 966 states and 1084 transitions. [2024-11-13 14:13:40,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-13 14:13:40,380 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 2.4328358208955225) internal successors, (163), 68 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 55 [2024-11-13 14:13:40,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:13:40,381 INFO L225 Difference]: With dead ends: 966 [2024-11-13 14:13:40,382 INFO L226 Difference]: Without dead ends: 838 [2024-11-13 14:13:40,382 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2772 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1065, Invalid=8441, Unknown=0, NotChecked=0, Total=9506 [2024-11-13 14:13:40,382 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 129 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 2347 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 2388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-13 14:13:40,383 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 697 Invalid, 2388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2347 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-13 14:13:40,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2024-11-13 14:13:40,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 638. [2024-11-13 14:13:40,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 636 states have (on average 1.1336477987421383) internal successors, (721), 637 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:13:40,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 721 transitions. [2024-11-13 14:13:40,394 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 721 transitions. Word has length 55 [2024-11-13 14:13:40,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:13:40,394 INFO L471 AbstractCegarLoop]: Abstraction has 638 states and 721 transitions. [2024-11-13 14:13:40,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 2.4328358208955225) internal successors, (163), 68 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:13:40,395 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 721 transitions. [2024-11-13 14:13:40,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-13 14:13:40,396 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:13:40,396 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 14:13:40,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-13 14:13:40,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-11-13 14:13:40,597 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:13:40,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:13:40,598 INFO L85 PathProgramCache]: Analyzing trace with hash 680089423, now seen corresponding path program 11 times [2024-11-13 14:13:40,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:13:40,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231407809] [2024-11-13 14:13:40,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:13:40,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:13:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:13:41,655 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 14:13:41,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:13:41,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231407809] [2024-11-13 14:13:41,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231407809] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:13:41,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411171064] [2024-11-13 14:13:41,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 14:13:41,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:13:41,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:13:41,658 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:13:41,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-13 14:13:41,895 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-11-13 14:13:41,895 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:13:41,898 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-13 14:13:41,900 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:13:42,324 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 14:13:42,913 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 14:13:42,913 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:13:42,957 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 14:13:42,959 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 14:13:43,146 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 14:13:43,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411171064] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:13:43,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:13:43,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 49 [2024-11-13 14:13:43,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41386837] [2024-11-13 14:13:43,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:13:43,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-13 14:13:43,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:13:43,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-13 14:13:43,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2224, Unknown=0, NotChecked=0, Total=2352 [2024-11-13 14:13:43,148 INFO L87 Difference]: Start difference. First operand 638 states and 721 transitions. Second operand has 49 states, 49 states have (on average 2.3469387755102042) internal successors, (115), 49 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:13:46,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:13:46,956 INFO L93 Difference]: Finished difference Result 951 states and 1063 transitions. [2024-11-13 14:13:46,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-13 14:13:46,956 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.3469387755102042) internal successors, (115), 49 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have 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 14:13:46,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:13:46,960 INFO L225 Difference]: With dead ends: 951 [2024-11-13 14:13:46,960 INFO L226 Difference]: Without dead ends: 929 [2024-11-13 14:13:46,960 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=393, Invalid=6087, Unknown=0, NotChecked=0, Total=6480 [2024-11-13 14:13:46,960 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 158 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 3692 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 3728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 3692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-13 14:13:46,961 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 1270 Invalid, 3728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 3692 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-13 14:13:46,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2024-11-13 14:13:46,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 778. [2024-11-13 14:13:46,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 776 states have (on average 1.1404639175257731) internal successors, (885), 777 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:13:46,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 885 transitions. [2024-11-13 14:13:46,972 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 885 transitions. Word has length 56 [2024-11-13 14:13:46,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:13:46,973 INFO L471 AbstractCegarLoop]: Abstraction has 778 states and 885 transitions. [2024-11-13 14:13:46,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.3469387755102042) internal successors, (115), 49 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:13:46,973 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 885 transitions. [2024-11-13 14:13:46,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-13 14:13:46,974 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:13:46,975 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:13:46,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-13 14:13:47,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:13:47,175 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:13:47,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:13:47,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1931861257, now seen corresponding path program 6 times [2024-11-13 14:13:47,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:13:47,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461357175] [2024-11-13 14:13:47,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:13:47,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:13:47,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:13:48,341 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 6 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:13:48,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:13:48,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461357175] [2024-11-13 14:13:48,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461357175] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:13:48,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338392615] [2024-11-13 14:13:48,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 14:13:48,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:13:48,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:13:48,343 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:13:48,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-13 14:13:48,645 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-13 14:13:48,645 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:13:48,649 INFO L255 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-11-13 14:13:48,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:13:48,716 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 14:13:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 5 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:13:50,864 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:13:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:13:52,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338392615] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:13:52,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:13:52,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 61 [2024-11-13 14:13:52,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970040988] [2024-11-13 14:13:52,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:13:52,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-13 14:13:52,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:13:52,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-13 14:13:52,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=3412, Unknown=0, NotChecked=0, Total=3782 [2024-11-13 14:13:52,821 INFO L87 Difference]: Start difference. First operand 778 states and 885 transitions. Second operand has 62 states, 61 states have (on average 2.8688524590163933) internal successors, (175), 62 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:13:56,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:13:56,319 INFO L93 Difference]: Finished difference Result 1069 states and 1185 transitions. [2024-11-13 14:13:56,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-13 14:13:56,320 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 2.8688524590163933) internal successors, (175), 62 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2024-11-13 14:13:56,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:13:56,321 INFO L225 Difference]: With dead ends: 1069 [2024-11-13 14:13:56,321 INFO L226 Difference]: Without dead ends: 945 [2024-11-13 14:13:56,322 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2309 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=824, Invalid=8106, Unknown=0, NotChecked=0, Total=8930 [2024-11-13 14:13:56,322 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 124 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 2489 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 2522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-13 14:13:56,322 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 688 Invalid, 2522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2489 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-13 14:13:56,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2024-11-13 14:13:56,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 774. [2024-11-13 14:13:56,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 772 states have (on average 1.1411917098445596) internal successors, (881), 773 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:13:56,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 881 transitions. [2024-11-13 14:13:56,335 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 881 transitions. Word has length 59 [2024-11-13 14:13:56,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:13:56,335 INFO L471 AbstractCegarLoop]: Abstraction has 774 states and 881 transitions. [2024-11-13 14:13:56,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 2.8688524590163933) internal successors, (175), 62 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:13:56,336 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 881 transitions. [2024-11-13 14:13:56,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-13 14:13:56,337 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:13:56,338 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 14:13:56,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-13 14:13:56,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-11-13 14:13:56,538 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:13:56,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:13:56,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1020291002, now seen corresponding path program 12 times [2024-11-13 14:13:56,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:13:56,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049926368] [2024-11-13 14:13:56,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:13:56,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:13:56,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:13:57,685 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 14:13:57,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:13:57,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049926368] [2024-11-13 14:13:57,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049926368] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:13:57,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136635667] [2024-11-13 14:13:57,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 14:13:57,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:13:57,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:13:57,688 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:13:57,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-13 14:13:57,964 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-13 14:13:57,964 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:13:57,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-13 14:13:57,968 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:13:58,391 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 14:13:59,097 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 14:13:59,098 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:13:59,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 14:13:59,155 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 14:13:59,343 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 14:13:59,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136635667] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:13:59,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:13:59,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 53 [2024-11-13 14:13:59,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131199540] [2024-11-13 14:13:59,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:13:59,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-13 14:13:59,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:13:59,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-13 14:13:59,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2613, Unknown=0, NotChecked=0, Total=2756 [2024-11-13 14:13:59,345 INFO L87 Difference]: Start difference. First operand 774 states and 881 transitions. Second operand has 53 states, 53 states have (on average 2.358490566037736) internal successors, (125), 53 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:14:03,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:14:03,603 INFO L93 Difference]: Finished difference Result 1150 states and 1294 transitions. [2024-11-13 14:14:03,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-13 14:14:03,603 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.358490566037736) internal successors, (125), 53 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2024-11-13 14:14:03,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:14:03,605 INFO L225 Difference]: With dead ends: 1150 [2024-11-13 14:14:03,605 INFO L226 Difference]: Without dead ends: 1126 [2024-11-13 14:14:03,606 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=442, Invalid=7214, Unknown=0, NotChecked=0, Total=7656 [2024-11-13 14:14:03,606 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 169 mSDsluCounter, 1555 mSDsCounter, 0 mSdLazyCounter, 4780 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 1597 SdHoareTripleChecker+Invalid, 4820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 4780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-13 14:14:03,606 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 1597 Invalid, 4820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 4780 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-13 14:14:03,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2024-11-13 14:14:03,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 914. [2024-11-13 14:14:03,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 912 states have (on average 1.1513157894736843) internal successors, (1050), 913 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:14:03,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1050 transitions. [2024-11-13 14:14:03,631 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1050 transitions. Word has length 61 [2024-11-13 14:14:03,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:14:03,631 INFO L471 AbstractCegarLoop]: Abstraction has 914 states and 1050 transitions. [2024-11-13 14:14:03,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.358490566037736) internal successors, (125), 53 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:14:03,632 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1050 transitions. [2024-11-13 14:14:03,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-13 14:14:03,634 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:14:03,634 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:14:03,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-13 14:14:03,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-11-13 14:14:03,835 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:14:03,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:14:03,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1816309827, now seen corresponding path program 6 times [2024-11-13 14:14:03,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:14:03,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733274586] [2024-11-13 14:14:03,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:14:03,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:14:03,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:14:04,853 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 85 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:14:04,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:14:04,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733274586] [2024-11-13 14:14:04,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733274586] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:14:04,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308417900] [2024-11-13 14:14:04,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 14:14:04,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:14:04,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:14:04,855 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:14:04,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-13 14:14:05,331 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-13 14:14:05,331 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:14:05,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-13 14:14:05,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:14:05,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 14:14:06,200 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 42 proven. 95 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:14:06,200 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:14:06,681 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 14:14:06,686 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 14:14:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 42 proven. 95 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:14:07,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308417900] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:14:07,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:14:07,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 54 [2024-11-13 14:14:07,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112330705] [2024-11-13 14:14:07,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:14:07,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-13 14:14:07,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:14:07,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-13 14:14:07,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2024-11-13 14:14:07,155 INFO L87 Difference]: Start difference. First operand 914 states and 1050 transitions. Second operand has 54 states, 54 states have (on average 2.9814814814814814) internal successors, (161), 54 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:14:09,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:14:09,728 INFO L93 Difference]: Finished difference Result 1359 states and 1553 transitions. [2024-11-13 14:14:09,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-13 14:14:09,728 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.9814814814814814) internal successors, (161), 54 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2024-11-13 14:14:09,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:14:09,731 INFO L225 Difference]: With dead ends: 1359 [2024-11-13 14:14:09,732 INFO L226 Difference]: Without dead ends: 1247 [2024-11-13 14:14:09,732 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=338, Invalid=5362, Unknown=0, NotChecked=0, Total=5700 [2024-11-13 14:14:09,732 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 36 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-13 14:14:09,732 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 872 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2022 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-13 14:14:09,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2024-11-13 14:14:09,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1122. [2024-11-13 14:14:09,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1120 states have (on average 1.1535714285714285) internal successors, (1292), 1121 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:14:09,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1292 transitions. [2024-11-13 14:14:09,745 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1292 transitions. Word has length 61 [2024-11-13 14:14:09,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:14:09,746 INFO L471 AbstractCegarLoop]: Abstraction has 1122 states and 1292 transitions. [2024-11-13 14:14:09,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.9814814814814814) internal successors, (161), 54 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:14:09,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1292 transitions. [2024-11-13 14:14:09,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-13 14:14:09,748 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:14:09,749 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:14:09,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-13 14:14:09,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-11-13 14:14:09,949 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:14:09,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:14:09,950 INFO L85 PathProgramCache]: Analyzing trace with hash -249119993, now seen corresponding path program 7 times [2024-11-13 14:14:09,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:14:09,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013615086] [2024-11-13 14:14:09,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:14:09,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:14:09,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:14:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 12 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:14:11,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:14:11,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013615086] [2024-11-13 14:14:11,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013615086] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:14:11,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405592469] [2024-11-13 14:14:11,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 14:14:11,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:14:11,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:14:11,205 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:14:11,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-13 14:14:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:14:11,487 INFO L255 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 119 conjuncts are in the unsatisfiable core [2024-11-13 14:14:11,491 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:14:11,572 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 14:14:11,593 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 14:14:14,136 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:14:14,136 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:14:16,321 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:14:16,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405592469] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:14:16,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:14:16,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 25] total 68 [2024-11-13 14:14:16,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146868271] [2024-11-13 14:14:16,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:14:16,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-13 14:14:16,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:14:16,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-13 14:14:16,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=4321, Unknown=0, NotChecked=0, Total=4692 [2024-11-13 14:14:16,323 INFO L87 Difference]: Start difference. First operand 1122 states and 1292 transitions. Second operand has 69 states, 68 states have (on average 2.75) internal successors, (187), 69 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 14:14:21,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:14:21,006 INFO L93 Difference]: Finished difference Result 1364 states and 1537 transitions. [2024-11-13 14:14:21,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-11-13 14:14:21,006 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 2.75) internal successors, (187), 69 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 14:14:21,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:14:21,009 INFO L225 Difference]: With dead ends: 1364 [2024-11-13 14:14:21,009 INFO L226 Difference]: Without dead ends: 1296 [2024-11-13 14:14:21,009 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3375 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1060, Invalid=10930, Unknown=0, NotChecked=0, Total=11990 [2024-11-13 14:14:21,010 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 260 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 3807 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 3863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 3807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-13 14:14:21,010 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 1033 Invalid, 3863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 3807 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-13 14:14:21,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2024-11-13 14:14:21,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1122. [2024-11-13 14:14:21,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1120 states have (on average 1.1553571428571427) internal successors, (1294), 1121 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:14:21,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1294 transitions. [2024-11-13 14:14:21,024 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1294 transitions. Word has length 63 [2024-11-13 14:14:21,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:14:21,024 INFO L471 AbstractCegarLoop]: Abstraction has 1122 states and 1294 transitions. [2024-11-13 14:14:21,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 2.75) internal successors, (187), 69 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 14:14:21,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1294 transitions. [2024-11-13 14:14:21,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-13 14:14:21,027 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:14:21,027 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:14:21,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-13 14:14:21,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2024-11-13 14:14:21,227 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:14:21,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:14:21,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1451716831, now seen corresponding path program 7 times [2024-11-13 14:14:21,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:14:21,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525730586] [2024-11-13 14:14:21,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:14:21,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:14:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:14:22,203 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 22 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:14:22,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:14:22,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525730586] [2024-11-13 14:14:22,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525730586] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:14:22,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627862372] [2024-11-13 14:14:22,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 14:14:22,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:14:22,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:14:22,205 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:14:22,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-13 14:14:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:14:22,424 INFO L255 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-13 14:14:22,427 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:14:22,695 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 14:14:23,148 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 21 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:14:23,148 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:14:23,231 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 14:14:23,233 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 14:14:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 21 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:14:23,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627862372] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:14:23,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:14:23,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 43 [2024-11-13 14:14:23,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324502471] [2024-11-13 14:14:23,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:14:23,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-13 14:14:23,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:14:23,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-13 14:14:23,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1702, Unknown=0, NotChecked=0, Total=1806 [2024-11-13 14:14:23,435 INFO L87 Difference]: Start difference. First operand 1122 states and 1294 transitions. Second operand has 43 states, 43 states have (on average 3.046511627906977) internal successors, (131), 43 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:14:29,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:14:29,287 INFO L93 Difference]: Finished difference Result 1688 states and 1925 transitions. [2024-11-13 14:14:29,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2024-11-13 14:14:29,287 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.046511627906977) internal successors, (131), 43 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2024-11-13 14:14:29,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:14:29,290 INFO L225 Difference]: With dead ends: 1688 [2024-11-13 14:14:29,290 INFO L226 Difference]: Without dead ends: 1495 [2024-11-13 14:14:29,290 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2990 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=451, Invalid=11759, Unknown=0, NotChecked=0, Total=12210 [2024-11-13 14:14:29,291 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 63 mSDsluCounter, 1751 mSDsCounter, 0 mSdLazyCounter, 5664 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1809 SdHoareTripleChecker+Invalid, 5683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 5664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-13 14:14:29,291 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1809 Invalid, 5683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 5664 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-13 14:14:29,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1495 states. [2024-11-13 14:14:29,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1495 to 1340. [2024-11-13 14:14:29,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1338 states have (on average 1.1599402092675635) internal successors, (1552), 1339 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:14:29,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 1552 transitions. [2024-11-13 14:14:29,304 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 1552 transitions. Word has length 64 [2024-11-13 14:14:29,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:14:29,304 INFO L471 AbstractCegarLoop]: Abstraction has 1340 states and 1552 transitions. [2024-11-13 14:14:29,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.046511627906977) internal successors, (131), 43 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:14:29,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 1552 transitions. [2024-11-13 14:14:29,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-13 14:14:29,307 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:14:29,307 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 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 14:14:29,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-11-13 14:14:29,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2024-11-13 14:14:29,507 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:14:29,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:14:29,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1182758333, now seen corresponding path program 8 times [2024-11-13 14:14:29,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:14:29,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892966245] [2024-11-13 14:14:29,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:14:29,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:14:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:14:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 51 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:14:30,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:14:30,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892966245] [2024-11-13 14:14:30,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892966245] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:14:30,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914456930] [2024-11-13 14:14:30,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:14:30,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:14:30,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:14:30,605 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:14:30,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-13 14:14:30,860 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:14:30,860 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:14:30,865 INFO L255 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-13 14:14:30,869 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:14:30,920 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 14:14:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:14:34,165 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:14:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:14:36,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914456930] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:14:36,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:14:36,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 28] total 80 [2024-11-13 14:14:36,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541447664] [2024-11-13 14:14:36,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:14:36,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-11-13 14:14:36,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:14:36,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-11-13 14:14:36,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=5908, Unknown=0, NotChecked=0, Total=6480 [2024-11-13 14:14:36,747 INFO L87 Difference]: Start difference. First operand 1340 states and 1552 transitions. Second operand has 81 states, 80 states have (on average 2.4125) internal successors, (193), 81 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 14:14:42,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:14:42,576 INFO L93 Difference]: Finished difference Result 1701 states and 1911 transitions. [2024-11-13 14:14:42,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-13 14:14:42,578 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 2.4125) internal successors, (193), 81 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 65 [2024-11-13 14:14:42,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:14:42,580 INFO L225 Difference]: With dead ends: 1701 [2024-11-13 14:14:42,580 INFO L226 Difference]: Without dead ends: 1533 [2024-11-13 14:14:42,581 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4290 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1416, Invalid=13346, Unknown=0, NotChecked=0, Total=14762 [2024-11-13 14:14:42,582 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 219 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 4167 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 4221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 4167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:14:42,582 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 1147 Invalid, 4221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 4167 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-13 14:14:42,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2024-11-13 14:14:42,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1124. [2024-11-13 14:14:42,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1122 states have (on average 1.1327985739750446) internal successors, (1271), 1123 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:14:42,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1271 transitions. [2024-11-13 14:14:42,597 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1271 transitions. Word has length 65 [2024-11-13 14:14:42,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:14:42,597 INFO L471 AbstractCegarLoop]: Abstraction has 1124 states and 1271 transitions. [2024-11-13 14:14:42,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 80 states have (on average 2.4125) internal successors, (193), 81 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 14:14:42,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1271 transitions. [2024-11-13 14:14:42,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-13 14:14:42,599 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:14:42,599 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 14:14:42,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-13 14:14:42,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:14:42,799 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:14:42,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:14:42,800 INFO L85 PathProgramCache]: Analyzing trace with hash -659200895, now seen corresponding path program 13 times [2024-11-13 14:14:42,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:14:42,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370326288] [2024-11-13 14:14:42,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:14:42,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:14:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:14:44,183 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 14:14:44,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:14:44,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370326288] [2024-11-13 14:14:44,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370326288] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:14:44,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181636681] [2024-11-13 14:14:44,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 14:14:44,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:14:44,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:14:44,186 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:14:44,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-13 14:14:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:14:44,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-13 14:14:44,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:14:45,001 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 14:14:45,805 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 14:14:45,805 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:14:45,856 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 14:14:45,859 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 14:14:46,074 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 14:14:46,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181636681] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:14:46,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:14:46,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 57 [2024-11-13 14:14:46,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663110843] [2024-11-13 14:14:46,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:14:46,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-13 14:14:46,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:14:46,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-13 14:14:46,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=3033, Unknown=0, NotChecked=0, Total=3192 [2024-11-13 14:14:46,077 INFO L87 Difference]: Start difference. First operand 1124 states and 1271 transitions. Second operand has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:14:51,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:14:51,446 INFO L93 Difference]: Finished difference Result 1620 states and 1813 transitions. [2024-11-13 14:14:51,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-13 14:14:51,446 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2024-11-13 14:14:51,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:14:51,450 INFO L225 Difference]: With dead ends: 1620 [2024-11-13 14:14:51,451 INFO L226 Difference]: Without dead ends: 1594 [2024-11-13 14:14:51,451 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=494, Invalid=8436, Unknown=0, NotChecked=0, Total=8930 [2024-11-13 14:14:51,451 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 184 mSDsluCounter, 1640 mSDsCounter, 0 mSdLazyCounter, 5199 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1684 SdHoareTripleChecker+Invalid, 5243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 5199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-13 14:14:51,452 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1684 Invalid, 5243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 5199 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-13 14:14:51,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2024-11-13 14:14:51,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1346. [2024-11-13 14:14:51,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1346 states, 1344 states have (on average 1.1398809523809523) internal successors, (1532), 1345 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:14:51,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 1532 transitions. [2024-11-13 14:14:51,466 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 1532 transitions. Word has length 66 [2024-11-13 14:14:51,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:14:51,466 INFO L471 AbstractCegarLoop]: Abstraction has 1346 states and 1532 transitions. [2024-11-13 14:14:51,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:14:51,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 1532 transitions. [2024-11-13 14:14:51,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-13 14:14:51,468 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:14:51,468 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:14:51,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-13 14:14:51,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2024-11-13 14:14:51,669 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:14:51,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:14:51,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1266843717, now seen corresponding path program 9 times [2024-11-13 14:14:51,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:14:51,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889753540] [2024-11-13 14:14:51,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:14:51,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:14:51,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:14:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 23 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:14:53,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:14:53,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889753540] [2024-11-13 14:14:53,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889753540] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:14:53,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369924175] [2024-11-13 14:14:53,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:14:53,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:14:53,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:14:53,150 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:14:53,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-13 14:14:53,630 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-13 14:14:53,630 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:14:53,635 INFO L255 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-11-13 14:14:53,639 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:14:53,725 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 14:14:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:14:56,890 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:14:59,706 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:14:59,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369924175] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:14:59,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:14:59,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29, 29] total 81 [2024-11-13 14:14:59,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473427461] [2024-11-13 14:14:59,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:14:59,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-11-13 14:14:59,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:14:59,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-11-13 14:14:59,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=524, Invalid=6118, Unknown=0, NotChecked=0, Total=6642 [2024-11-13 14:14:59,709 INFO L87 Difference]: Start difference. First operand 1346 states and 1532 transitions. Second operand has 82 states, 81 states have (on average 2.5308641975308643) internal successors, (205), 82 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:15:06,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:15:06,346 INFO L93 Difference]: Finished difference Result 1933 states and 2142 transitions. [2024-11-13 14:15:06,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2024-11-13 14:15:06,347 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 2.5308641975308643) internal successors, (205), 82 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2024-11-13 14:15:06,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:15:06,350 INFO L225 Difference]: With dead ends: 1933 [2024-11-13 14:15:06,350 INFO L226 Difference]: Without dead ends: 1761 [2024-11-13 14:15:06,350 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6024 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1684, Invalid=17498, Unknown=0, NotChecked=0, Total=19182 [2024-11-13 14:15:06,351 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 219 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 4498 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 4544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 4498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-13 14:15:06,351 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 1163 Invalid, 4544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 4498 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-13 14:15:06,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2024-11-13 14:15:06,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 1358. [2024-11-13 14:15:06,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 1356 states have (on average 1.1386430678466077) internal successors, (1544), 1357 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:15:06,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 1544 transitions. [2024-11-13 14:15:06,363 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 1544 transitions. Word has length 69 [2024-11-13 14:15:06,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:15:06,363 INFO L471 AbstractCegarLoop]: Abstraction has 1358 states and 1544 transitions. [2024-11-13 14:15:06,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 2.5308641975308643) internal successors, (205), 82 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:15:06,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 1544 transitions. [2024-11-13 14:15:06,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-13 14:15:06,365 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:15:06,365 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 14:15:06,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-13 14:15:06,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:15:06,565 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:15:06,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:15:06,566 INFO L85 PathProgramCache]: Analyzing trace with hash -154360968, now seen corresponding path program 14 times [2024-11-13 14:15:06,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:15:06,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261811395] [2024-11-13 14:15:06,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:15:06,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:15:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:15:08,032 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 14:15:08,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:15:08,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261811395] [2024-11-13 14:15:08,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261811395] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:15:08,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896624253] [2024-11-13 14:15:08,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:15:08,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:15:08,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:15:08,035 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:15:08,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-13 14:15:08,295 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:15:08,295 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:15:08,298 INFO L255 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-13 14:15:08,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:15:08,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 14:15:09,937 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 14:15:09,938 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:15:10,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 14:15:10,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 14:15:10,265 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 14:15:10,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896624253] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:15:10,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:15:10,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 61 [2024-11-13 14:15:10,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748877547] [2024-11-13 14:15:10,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:15:10,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-13 14:15:10,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:15:10,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-13 14:15:10,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=3484, Unknown=0, NotChecked=0, Total=3660 [2024-11-13 14:15:10,267 INFO L87 Difference]: Start difference. First operand 1358 states and 1544 transitions. Second operand has 61 states, 61 states have (on average 2.377049180327869) internal successors, (145), 61 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:15:15,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:15:15,875 INFO L93 Difference]: Finished difference Result 1941 states and 2185 transitions. [2024-11-13 14:15:15,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-13 14:15:15,876 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.377049180327869) internal successors, (145), 61 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have 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 14:15:15,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:15:15,880 INFO L225 Difference]: With dead ends: 1941 [2024-11-13 14:15:15,880 INFO L226 Difference]: Without dead ends: 1913 [2024-11-13 14:15:15,881 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1807 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=549, Invalid=9753, Unknown=0, NotChecked=0, Total=10302 [2024-11-13 14:15:15,881 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 199 mSDsluCounter, 1784 mSDsCounter, 0 mSdLazyCounter, 5778 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 1830 SdHoareTripleChecker+Invalid, 5826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 5778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-13 14:15:15,881 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 1830 Invalid, 5826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 5778 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-11-13 14:15:15,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2024-11-13 14:15:15,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1580. [2024-11-13 14:15:15,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1578 states have (on average 1.1482889733840305) internal successors, (1812), 1579 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:15:15,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 1812 transitions. [2024-11-13 14:15:15,902 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 1812 transitions. Word has length 71 [2024-11-13 14:15:15,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:15:15,902 INFO L471 AbstractCegarLoop]: Abstraction has 1580 states and 1812 transitions. [2024-11-13 14:15:15,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.377049180327869) internal successors, (145), 61 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:15:15,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 1812 transitions. [2024-11-13 14:15:15,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-13 14:15:15,904 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:15:15,904 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:15:15,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-13 14:15:16,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:15:16,104 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:15:16,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:15:16,105 INFO L85 PathProgramCache]: Analyzing trace with hash -707641477, now seen corresponding path program 8 times [2024-11-13 14:15:16,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:15:16,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180430461] [2024-11-13 14:15:16,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:15:16,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:15:16,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:15:17,406 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 113 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:15:17,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:15:17,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180430461] [2024-11-13 14:15:17,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180430461] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:15:17,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236908671] [2024-11-13 14:15:17,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:15:17,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:15:17,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:15:17,409 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:15:17,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-13 14:15:17,685 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:15:17,685 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:15:17,689 INFO L255 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-11-13 14:15:17,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:15:18,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 14:15:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 24 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:15:18,749 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:15:18,829 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 15 treesize of output 13 [2024-11-13 14:15:18,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 14:15:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 24 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:15:19,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236908671] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:15:19,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:15:19,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 47 [2024-11-13 14:15:19,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108438801] [2024-11-13 14:15:19,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:15:19,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-13 14:15:19,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:15:19,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-13 14:15:19,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2030, Unknown=0, NotChecked=0, Total=2162 [2024-11-13 14:15:19,005 INFO L87 Difference]: Start difference. First operand 1580 states and 1812 transitions. Second operand has 47 states, 47 states have (on average 2.978723404255319) internal successors, (140), 47 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:15:22,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:15:22,378 INFO L93 Difference]: Finished difference Result 2298 states and 2613 transitions. [2024-11-13 14:15:22,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-13 14:15:22,378 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.978723404255319) internal successors, (140), 47 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2024-11-13 14:15:22,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:15:22,383 INFO L225 Difference]: With dead ends: 2298 [2024-11-13 14:15:22,383 INFO L226 Difference]: Without dead ends: 2162 [2024-11-13 14:15:22,383 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=360, Invalid=5042, Unknown=0, NotChecked=0, Total=5402 [2024-11-13 14:15:22,384 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 45 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 2633 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 2652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-13 14:15:22,384 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 942 Invalid, 2652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2633 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-13 14:15:22,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2024-11-13 14:15:22,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 1856. [2024-11-13 14:15:22,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1854 states have (on average 1.1542610571736784) internal successors, (2140), 1855 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:15:22,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 2140 transitions. [2024-11-13 14:15:22,411 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 2140 transitions. Word has length 71 [2024-11-13 14:15:22,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:15:22,411 INFO L471 AbstractCegarLoop]: Abstraction has 1856 states and 2140 transitions. [2024-11-13 14:15:22,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.978723404255319) internal successors, (140), 47 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:15:22,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 2140 transitions. [2024-11-13 14:15:22,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-13 14:15:22,414 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:15:22,414 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:15:22,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-13 14:15:22,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:15:22,615 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:15:22,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:15:22,615 INFO L85 PathProgramCache]: Analyzing trace with hash -194330124, now seen corresponding path program 10 times [2024-11-13 14:15:22,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:15:22,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765602560] [2024-11-13 14:15:22,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:15:22,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:15:22,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:15:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 35 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:15:24,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:15:24,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765602560] [2024-11-13 14:15:24,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765602560] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:15:24,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622884111] [2024-11-13 14:15:24,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:15:24,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:15:24,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:15:24,150 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:15:24,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-13 14:15:24,754 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:15:24,754 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:15:24,759 INFO L255 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 141 conjuncts are in the unsatisfiable core [2024-11-13 14:15:24,763 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:15:24,819 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 14:15:24,836 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 14:15:27,337 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:15:27,337 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:15:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:15:29,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622884111] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:15:29,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:15:29,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 27] total 75 [2024-11-13 14:15:29,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22546139] [2024-11-13 14:15:29,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:15:30,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-13 14:15:30,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:15:30,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-13 14:15:30,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=5185, Unknown=0, NotChecked=0, Total=5700 [2024-11-13 14:15:30,001 INFO L87 Difference]: Start difference. First operand 1856 states and 2140 transitions. Second operand has 76 states, 75 states have (on average 2.8533333333333335) internal successors, (214), 76 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:15:34,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:15:34,796 INFO L93 Difference]: Finished difference Result 2316 states and 2612 transitions. [2024-11-13 14:15:34,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-11-13 14:15:34,797 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 2.8533333333333335) internal successors, (214), 76 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2024-11-13 14:15:34,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:15:34,802 INFO L225 Difference]: With dead ends: 2316 [2024-11-13 14:15:34,802 INFO L226 Difference]: Without dead ends: 2236 [2024-11-13 14:15:34,803 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3995 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1191, Invalid=12149, Unknown=0, NotChecked=0, Total=13340 [2024-11-13 14:15:34,804 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 237 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 3913 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 3980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 3913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-13 14:15:34,804 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 1002 Invalid, 3980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 3913 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-13 14:15:34,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2024-11-13 14:15:34,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 1864. [2024-11-13 14:15:34,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1862 states have (on average 1.1552094522019334) internal successors, (2151), 1863 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:15:34,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 2151 transitions. [2024-11-13 14:15:34,822 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 2151 transitions. Word has length 72 [2024-11-13 14:15:34,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:15:34,822 INFO L471 AbstractCegarLoop]: Abstraction has 1864 states and 2151 transitions. [2024-11-13 14:15:34,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 2.8533333333333335) internal successors, (214), 76 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:15:34,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 2151 transitions. [2024-11-13 14:15:34,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-13 14:15:34,825 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:15:34,825 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:15:34,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-13 14:15:35,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-11-13 14:15:35,025 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:15:35,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:15:35,026 INFO L85 PathProgramCache]: Analyzing trace with hash -593898311, now seen corresponding path program 11 times [2024-11-13 14:15:35,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:15:35,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650297715] [2024-11-13 14:15:35,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:15:35,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:15:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:15:36,186 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:15:36,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:15:36,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650297715] [2024-11-13 14:15:36,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650297715] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:15:36,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942507701] [2024-11-13 14:15:36,186 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 14:15:36,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:15:36,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:15:36,188 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:15:36,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-13 14:15:36,846 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-13 14:15:36,846 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:15:36,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 131 conjuncts are in the unsatisfiable core [2024-11-13 14:15:36,854 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:15:36,913 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 14:15:36,923 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 14:15:40,082 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:15:40,083 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:15:43,096 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:15:43,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942507701] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:15:43,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:15:43,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29, 29] total 81 [2024-11-13 14:15:43,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325908967] [2024-11-13 14:15:43,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:15:43,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-11-13 14:15:43,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:15:43,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-11-13 14:15:43,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=6070, Unknown=0, NotChecked=0, Total=6642 [2024-11-13 14:15:43,099 INFO L87 Difference]: Start difference. First operand 1864 states and 2151 transitions. Second operand has 82 states, 81 states have (on average 2.6790123456790123) internal successors, (217), 82 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:15:49,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:15:49,916 INFO L93 Difference]: Finished difference Result 2287 states and 2581 transitions. [2024-11-13 14:15:49,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-11-13 14:15:49,916 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 2.6790123456790123) internal successors, (217), 82 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 14:15:49,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:15:49,921 INFO L225 Difference]: With dead ends: 2287 [2024-11-13 14:15:49,921 INFO L226 Difference]: Without dead ends: 2127 [2024-11-13 14:15:49,922 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4488 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1270, Invalid=13982, Unknown=0, NotChecked=0, Total=15252 [2024-11-13 14:15:49,923 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 281 mSDsluCounter, 1167 mSDsCounter, 0 mSdLazyCounter, 4544 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 4587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 4544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-13 14:15:49,923 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 1211 Invalid, 4587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 4544 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-13 14:15:49,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2024-11-13 14:15:49,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 1860. [2024-11-13 14:15:49,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1858 states have (on average 1.1544671689989237) internal successors, (2145), 1859 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:15:49,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 2145 transitions. [2024-11-13 14:15:49,948 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 2145 transitions. Word has length 73 [2024-11-13 14:15:49,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:15:49,948 INFO L471 AbstractCegarLoop]: Abstraction has 1860 states and 2145 transitions. [2024-11-13 14:15:49,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 2.6790123456790123) internal successors, (217), 82 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:15:49,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 2145 transitions. [2024-11-13 14:15:49,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-13 14:15:49,950 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:15:49,950 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 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 14:15:49,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-13 14:15:50,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-11-13 14:15:50,151 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:15:50,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:15:50,151 INFO L85 PathProgramCache]: Analyzing trace with hash -211572625, now seen corresponding path program 12 times [2024-11-13 14:15:50,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:15:50,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068075324] [2024-11-13 14:15:50,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:15:50,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:15:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:15:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 92 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:15:51,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:15:51,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068075324] [2024-11-13 14:15:51,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068075324] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:15:51,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469083926] [2024-11-13 14:15:51,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 14:15:51,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:15:51,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:15:51,601 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:15:51,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-13 14:15:52,179 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-13 14:15:52,179 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:15:52,183 INFO L255 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-11-13 14:15:52,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:15:52,248 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 14:15:55,079 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 117 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:15:55,080 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:15:57,892 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 145 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:15:57,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469083926] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:15:57,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:15:57,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32, 33] total 93 [2024-11-13 14:15:57,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076945348] [2024-11-13 14:15:57,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:15:57,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2024-11-13 14:15:57,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:15:57,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2024-11-13 14:15:57,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=939, Invalid=7803, Unknown=0, NotChecked=0, Total=8742 [2024-11-13 14:15:57,894 INFO L87 Difference]: Start difference. First operand 1860 states and 2145 transitions. Second operand has 94 states, 93 states have (on average 2.3978494623655915) internal successors, (223), 94 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:16:03,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:16:03,609 INFO L93 Difference]: Finished difference Result 2385 states and 2668 transitions. [2024-11-13 14:16:03,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-11-13 14:16:03,609 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 2.3978494623655915) internal successors, (223), 94 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 75 [2024-11-13 14:16:03,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:16:03,613 INFO L225 Difference]: With dead ends: 2385 [2024-11-13 14:16:03,613 INFO L226 Difference]: Without dead ends: 2240 [2024-11-13 14:16:03,614 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5314 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1608, Invalid=15684, Unknown=0, NotChecked=0, Total=17292 [2024-11-13 14:16:03,614 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 199 mSDsluCounter, 1246 mSDsCounter, 0 mSdLazyCounter, 4367 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 4425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 4367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:16:03,614 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 1299 Invalid, 4425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 4367 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-13 14:16:03,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2240 states. [2024-11-13 14:16:03,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2240 to 1556. [2024-11-13 14:16:03,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1556 states, 1554 states have (on average 1.1312741312741312) internal successors, (1758), 1555 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:16:03,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1556 states to 1556 states and 1758 transitions. [2024-11-13 14:16:03,627 INFO L78 Accepts]: Start accepts. Automaton has 1556 states and 1758 transitions. Word has length 75 [2024-11-13 14:16:03,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:16:03,627 INFO L471 AbstractCegarLoop]: Abstraction has 1556 states and 1758 transitions. [2024-11-13 14:16:03,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 2.3978494623655915) internal successors, (223), 94 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:16:03,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1556 states and 1758 transitions. [2024-11-13 14:16:03,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-13 14:16:03,629 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:16:03,629 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 14:16:03,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-13 14:16:03,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-11-13 14:16:03,829 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:16:03,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:16:03,830 INFO L85 PathProgramCache]: Analyzing trace with hash 2060089523, now seen corresponding path program 15 times [2024-11-13 14:16:03,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:16:03,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768939903] [2024-11-13 14:16:03,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:16:03,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:16:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:16:05,047 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 14:16:05,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:16:05,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768939903] [2024-11-13 14:16:05,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768939903] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:16:05,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691917978] [2024-11-13 14:16:05,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:16:05,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:16:05,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:16:05,050 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:16:05,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-13 14:16:05,495 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-11-13 14:16:05,495 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:16:05,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-11-13 14:16:05,502 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:16:06,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 14:16:07,011 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 14:16:07,011 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:16:07,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 14:16:07,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 14:16:07,272 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 14:16:07,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691917978] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:16:07,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:16:07,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 65 [2024-11-13 14:16:07,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033549842] [2024-11-13 14:16:07,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:16:07,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-13 14:16:07,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:16:07,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-13 14:16:07,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=3966, Unknown=0, NotChecked=0, Total=4160 [2024-11-13 14:16:07,274 INFO L87 Difference]: Start difference. First operand 1556 states and 1758 transitions. Second operand has 65 states, 65 states have (on average 2.3846153846153846) internal successors, (155), 65 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:16:14,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:16:14,206 INFO L93 Difference]: Finished difference Result 2185 states and 2444 transitions. [2024-11-13 14:16:14,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-11-13 14:16:14,207 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.3846153846153846) internal successors, (155), 65 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have 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 14:16:14,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:16:14,210 INFO L225 Difference]: With dead ends: 2185 [2024-11-13 14:16:14,210 INFO L226 Difference]: Without dead ends: 2155 [2024-11-13 14:16:14,210 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=607, Invalid=11165, Unknown=0, NotChecked=0, Total=11772 [2024-11-13 14:16:14,211 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 210 mSDsluCounter, 2221 mSDsCounter, 0 mSdLazyCounter, 7235 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 2269 SdHoareTripleChecker+Invalid, 7287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 7235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-11-13 14:16:14,211 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 2269 Invalid, 7287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 7235 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2024-11-13 14:16:14,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2024-11-13 14:16:14,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 1841. [2024-11-13 14:16:14,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1839 states have (on average 1.1375747688961393) internal successors, (2092), 1840 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:16:14,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2092 transitions. [2024-11-13 14:16:14,226 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2092 transitions. Word has length 76 [2024-11-13 14:16:14,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:16:14,227 INFO L471 AbstractCegarLoop]: Abstraction has 1841 states and 2092 transitions. [2024-11-13 14:16:14,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.3846153846153846) internal successors, (155), 65 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:16:14,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2092 transitions. [2024-11-13 14:16:14,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-13 14:16:14,229 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:16:14,229 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:16:14,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-13 14:16:14,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:16:14,429 INFO L396 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:16:14,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:16:14,430 INFO L85 PathProgramCache]: Analyzing trace with hash -974118582, now seen corresponding path program 13 times [2024-11-13 14:16:14,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:16:14,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167486004] [2024-11-13 14:16:14,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:16:14,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:16:14,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:16:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 70 proven. 152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:16:15,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:16:15,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167486004] [2024-11-13 14:16:15,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167486004] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:16:15,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524550993] [2024-11-13 14:16:15,940 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 14:16:15,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:16:15,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:16:15,943 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:16:15,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-13 14:16:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:16:16,256 INFO L255 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-11-13 14:16:16,260 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:16:16,316 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 14:16:19,464 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 93 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:16:19,464 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:16:22,716 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 122 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:16:22,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524550993] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:16:22,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:16:22,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 30] total 86 [2024-11-13 14:16:22,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897849791] [2024-11-13 14:16:22,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:16:22,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-11-13 14:16:22,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:16:22,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-11-13 14:16:22,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=735, Invalid=6747, Unknown=0, NotChecked=0, Total=7482 [2024-11-13 14:16:22,719 INFO L87 Difference]: Start difference. First operand 1841 states and 2092 transitions. Second operand has 87 states, 86 states have (on average 2.6627906976744184) internal successors, (229), 87 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 14:16:30,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:16:30,597 INFO L93 Difference]: Finished difference Result 2644 states and 2935 transitions. [2024-11-13 14:16:30,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-11-13 14:16:30,597 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 2.6627906976744184) internal successors, (229), 87 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 77 [2024-11-13 14:16:30,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:16:30,603 INFO L225 Difference]: With dead ends: 2644 [2024-11-13 14:16:30,603 INFO L226 Difference]: Without dead ends: 2473 [2024-11-13 14:16:30,604 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5214 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1621, Invalid=17285, Unknown=0, NotChecked=0, Total=18906 [2024-11-13 14:16:30,604 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 146 mSDsluCounter, 1506 mSDsCounter, 0 mSdLazyCounter, 5448 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1558 SdHoareTripleChecker+Invalid, 5493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 5448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-13 14:16:30,604 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 1558 Invalid, 5493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 5448 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2024-11-13 14:16:30,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2024-11-13 14:16:30,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 1849. [2024-11-13 14:16:30,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1847 states have (on average 1.1364374661613428) internal successors, (2099), 1848 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:16:30,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2099 transitions. [2024-11-13 14:16:30,624 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2099 transitions. Word has length 77 [2024-11-13 14:16:30,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:16:30,624 INFO L471 AbstractCegarLoop]: Abstraction has 1849 states and 2099 transitions. [2024-11-13 14:16:30,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 2.6627906976744184) internal successors, (229), 87 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 14:16:30,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2099 transitions. [2024-11-13 14:16:30,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-13 14:16:30,626 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:16:30,626 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:16:30,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-11-13 14:16:30,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:16:30,826 INFO L396 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:16:30,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:16:30,827 INFO L85 PathProgramCache]: Analyzing trace with hash -900830767, now seen corresponding path program 9 times [2024-11-13 14:16:30,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:16:30,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183312352] [2024-11-13 14:16:30,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:16:30,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:16:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:16:32,286 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 145 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:16:32,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:16:32,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183312352] [2024-11-13 14:16:32,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183312352] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:16:32,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757949584] [2024-11-13 14:16:32,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:16:32,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:16:32,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:16:32,289 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:16:32,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-13 14:16:33,602 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-13 14:16:33,602 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:16:33,609 INFO L255 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 102 conjuncts are in the unsatisfiable core [2024-11-13 14:16:33,612 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:16:34,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 14:16:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 27 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:16:34,822 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:16:34,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 14:16:34,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 14:16:35,101 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 27 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:16:35,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757949584] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:16:35,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:16:35,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 51 [2024-11-13 14:16:35,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187879144] [2024-11-13 14:16:35,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:16:35,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-13 14:16:35,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:16:35,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-13 14:16:35,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2024-11-13 14:16:35,102 INFO L87 Difference]: Start difference. First operand 1849 states and 2099 transitions. Second operand has 51 states, 51 states have (on average 3.019607843137255) internal successors, (154), 51 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:16:38,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:16:38,628 INFO L93 Difference]: Finished difference Result 2777 states and 3119 transitions. [2024-11-13 14:16:38,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-13 14:16:38,629 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.019607843137255) internal successors, (154), 51 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have 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 14:16:38,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:16:38,632 INFO L225 Difference]: With dead ends: 2777 [2024-11-13 14:16:38,633 INFO L226 Difference]: Without dead ends: 2583 [2024-11-13 14:16:38,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=416, Invalid=6064, Unknown=0, NotChecked=0, Total=6480 [2024-11-13 14:16:38,633 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 46 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 2923 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 2946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:16:38,634 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 970 Invalid, 2946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2923 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-13 14:16:38,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2024-11-13 14:16:38,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 2142. [2024-11-13 14:16:38,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2140 states have (on average 1.142056074766355) internal successors, (2444), 2141 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:16:38,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 2444 transitions. [2024-11-13 14:16:38,664 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 2444 transitions. Word has length 78 [2024-11-13 14:16:38,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:16:38,664 INFO L471 AbstractCegarLoop]: Abstraction has 2142 states and 2444 transitions. [2024-11-13 14:16:38,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.019607843137255) internal successors, (154), 51 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:16:38,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 2444 transitions. [2024-11-13 14:16:38,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-13 14:16:38,667 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:16:38,667 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 14:16:38,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-13 14:16:38,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:16:38,868 INFO L396 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-13 14:16:38,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:16:38,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1485559210, now seen corresponding path program 16 times [2024-11-13 14:16:38,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:16:38,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897293740] [2024-11-13 14:16:38,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:16:38,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:16:38,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:16:40,723 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 14:16:40,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:16:40,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897293740] [2024-11-13 14:16:40,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897293740] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:16:40,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416064579] [2024-11-13 14:16:40,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:16:40,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:16:40,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:16:40,725 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:16:40,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f4ea13-4392-4198-97b2-f78b5ec2cce0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-13 14:16:41,106 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:16:41,107 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:16:41,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 122 conjuncts are in the unsatisfiable core [2024-11-13 14:16:41,113 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:16:42,096 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 14:19:37,825 INFO L349 Elim1Store]: treesize reduction 57, result has 49.6 percent of original size [2024-11-13 14:19:37,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 148 treesize of output 114 [2024-11-13 14:19:37,832 WARN L672 sPolynomialRelations]: Constructing 8192(two to the power of 13 dual juncts. [2024-11-13 14:19:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 35 proven. 260 refuted. 148 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:19:38,375 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:19:50,648 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 209 treesize of output 181 [2024-11-13 14:19:50,665 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:19:50,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 209 treesize of output 155 [2024-11-13 14:19:53,293 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 196 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:19:53,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416064579] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:19:53,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:19:53,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 47, 47] total 122 [2024-11-13 14:19:53,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560915057] [2024-11-13 14:19:53,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:19:53,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2024-11-13 14:19:53,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:19:53,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2024-11-13 14:19:53,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1160, Invalid=13388, Unknown=214, NotChecked=0, Total=14762 [2024-11-13 14:19:53,296 INFO L87 Difference]: Start difference. First operand 2142 states and 2444 transitions. Second operand has 122 states, 122 states have (on average 1.8934426229508197) internal successors, (231), 122 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)