./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-broom/dll-lst-data.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/dll-lst-data.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya --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 64bit --witnessprinter.graph.data.programhash 681b2cdabf3cde7288ed8a3079e7f4da8bc32fbe83841db92939828e5c0eb464 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:29:21,922 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:29:21,985 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2023-11-29 05:29:21,990 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:29:21,991 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:29:22,017 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:29:22,018 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:29:22,018 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:29:22,019 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:29:22,019 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:29:22,020 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:29:22,020 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:29:22,021 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:29:22,022 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:29:22,022 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:29:22,023 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:29:22,023 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:29:22,024 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:29:22,024 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 05:29:22,025 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 05:29:22,025 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 05:29:22,026 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:29:22,026 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 05:29:22,027 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 05:29:22,027 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:29:22,028 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:29:22,028 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:29:22,028 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:29:22,029 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:29:22,029 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:29:22,030 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:29:22,030 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:29:22,030 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:29:22,031 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:29:22,031 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:29:22,031 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:29:22,031 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:29:22,031 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:29:22,032 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 681b2cdabf3cde7288ed8a3079e7f4da8bc32fbe83841db92939828e5c0eb464 [2023-11-29 05:29:22,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:29:22,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:29:22,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:29:22,257 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:29:22,258 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:29:22,259 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/memsafety-broom/dll-lst-data.i [2023-11-29 05:29:24,988 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:29:25,235 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:29:25,235 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/sv-benchmarks/c/memsafety-broom/dll-lst-data.i [2023-11-29 05:29:25,262 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/data/561aaee0a/0df7651def154553bf0c92b2a830383f/FLAG3ec7f3f5b [2023-11-29 05:29:25,274 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/data/561aaee0a/0df7651def154553bf0c92b2a830383f [2023-11-29 05:29:25,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:29:25,278 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:29:25,280 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:29:25,280 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:29:25,284 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:29:25,285 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:29:25" (1/1) ... [2023-11-29 05:29:25,286 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a58927b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:29:25, skipping insertion in model container [2023-11-29 05:29:25,286 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:29:25" (1/1) ... [2023-11-29 05:29:25,344 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:29:25,584 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:29:25,592 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:29:25,631 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:29:25,658 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:29:25,659 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:29:25 WrapperNode [2023-11-29 05:29:25,659 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:29:25,660 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:29:25,660 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:29:25,660 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:29:25,666 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:29:25" (1/1) ... [2023-11-29 05:29:25,680 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:29:25" (1/1) ... [2023-11-29 05:29:25,699 INFO L138 Inliner]: procedures = 121, calls = 22, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 69 [2023-11-29 05:29:25,700 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:29:25,700 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:29:25,701 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:29:25,701 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:29:25,711 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:29:25" (1/1) ... [2023-11-29 05:29:25,711 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:29:25" (1/1) ... [2023-11-29 05:29:25,715 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:29:25" (1/1) ... [2023-11-29 05:29:25,736 INFO L175 MemorySlicer]: Split 12 memory accesses to 1 slices as follows [12]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 7 writes are split as follows [7]. [2023-11-29 05:29:25,736 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:29:25" (1/1) ... [2023-11-29 05:29:25,736 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:29:25" (1/1) ... [2023-11-29 05:29:25,745 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:29:25" (1/1) ... [2023-11-29 05:29:25,748 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:29:25" (1/1) ... [2023-11-29 05:29:25,750 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:29:25" (1/1) ... [2023-11-29 05:29:25,752 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:29:25" (1/1) ... [2023-11-29 05:29:25,755 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:29:25,756 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:29:25,756 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:29:25,756 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:29:25,757 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:29:25" (1/1) ... [2023-11-29 05:29:25,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:29:25,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:29:25,785 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:29:25,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:29:25,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 05:29:25,816 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2023-11-29 05:29:25,816 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2023-11-29 05:29:25,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 05:29:25,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-29 05:29:25,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-29 05:29:25,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:29:25,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:29:25,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:29:25,928 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:29:25,929 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:29:26,170 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:29:26,214 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:29:26,215 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 05:29:26,215 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:29:26 BoogieIcfgContainer [2023-11-29 05:29:26,215 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:29:26,218 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:29:26,218 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:29:26,221 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:29:26,222 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:29:25" (1/3) ... [2023-11-29 05:29:26,222 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e45e346 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:29:26, skipping insertion in model container [2023-11-29 05:29:26,222 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:29:25" (2/3) ... [2023-11-29 05:29:26,223 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e45e346 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:29:26, skipping insertion in model container [2023-11-29 05:29:26,223 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:29:26" (3/3) ... [2023-11-29 05:29:26,224 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-lst-data.i [2023-11-29 05:29:26,242 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:29:26,243 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-11-29 05:29:26,276 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:29:26,282 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@93a41e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:29:26,282 INFO L358 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2023-11-29 05:29:26,285 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 54 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 05:29:26,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-29 05:29:26,290 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:26,290 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-29 05:29:26,291 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-11-29 05:29:26,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:26,295 INFO L85 PathProgramCache]: Analyzing trace with hash 4482106, now seen corresponding path program 1 times [2023-11-29 05:29:26,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:26,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89425859] [2023-11-29 05:29:26,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:26,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:26,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:26,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:29:26,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:26,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89425859] [2023-11-29 05:29:26,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89425859] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:29:26,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:29:26,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:29:26,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507671939] [2023-11-29 05:29:26,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:29:26,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:29:26,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:26,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:29:26,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:29:26,543 INFO L87 Difference]: Start difference. First operand has 58 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 54 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:29:26,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:29:26,633 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2023-11-29 05:29:26,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:29:26,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-29 05:29:26,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:29:26,642 INFO L225 Difference]: With dead ends: 55 [2023-11-29 05:29:26,643 INFO L226 Difference]: Without dead ends: 54 [2023-11-29 05:29:26,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:29:26,648 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:29:26,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 64 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:29:26,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-29 05:29:26,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-11-29 05:29:26,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 50 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 05:29:26,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2023-11-29 05:29:26,684 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 4 [2023-11-29 05:29:26,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:29:26,685 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2023-11-29 05:29:26,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:29:26,685 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2023-11-29 05:29:26,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-29 05:29:26,686 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:26,686 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-29 05:29:26,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:29:26,686 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-11-29 05:29:26,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:26,687 INFO L85 PathProgramCache]: Analyzing trace with hash 4482107, now seen corresponding path program 1 times [2023-11-29 05:29:26,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:26,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68627842] [2023-11-29 05:29:26,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:26,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:26,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:26,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:29:26,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:26,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68627842] [2023-11-29 05:29:26,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68627842] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:29:26,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:29:26,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:29:26,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072928931] [2023-11-29 05:29:26,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:29:26,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:29:26,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:26,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:29:26,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:29:26,778 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:29:26,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:29:26,839 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2023-11-29 05:29:26,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:29:26,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-29 05:29:26,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:29:26,841 INFO L225 Difference]: With dead ends: 51 [2023-11-29 05:29:26,841 INFO L226 Difference]: Without dead ends: 51 [2023-11-29 05:29:26,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:29:26,843 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:29:26,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 67 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:29:26,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-29 05:29:26,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-11-29 05:29:26,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 47 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 05:29:26,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2023-11-29 05:29:26,850 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 4 [2023-11-29 05:29:26,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:29:26,851 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2023-11-29 05:29:26,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:29:26,851 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2023-11-29 05:29:26,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 05:29:26,851 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:26,852 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:29:26,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 05:29:26,852 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-11-29 05:29:26,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:26,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1869924759, now seen corresponding path program 1 times [2023-11-29 05:29:26,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:26,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136707962] [2023-11-29 05:29:26,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:26,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:27,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:29:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:29:27,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:27,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136707962] [2023-11-29 05:29:27,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136707962] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:29:27,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:29:27,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 05:29:27,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957404796] [2023-11-29 05:29:27,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:29:27,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:29:27,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:27,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:29:27,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:29:27,093 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 7 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 05:29:27,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:29:27,250 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2023-11-29 05:29:27,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:29:27,251 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-11-29 05:29:27,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:29:27,253 INFO L225 Difference]: With dead ends: 51 [2023-11-29 05:29:27,254 INFO L226 Difference]: Without dead ends: 51 [2023-11-29 05:29:27,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:29:27,255 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 17 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:29:27,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 108 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:29:27,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-29 05:29:27,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2023-11-29 05:29:27,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 43 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 05:29:27,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2023-11-29 05:29:27,263 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 9 [2023-11-29 05:29:27,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:29:27,264 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2023-11-29 05:29:27,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 05:29:27,264 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2023-11-29 05:29:27,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 05:29:27,265 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:27,265 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:29:27,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 05:29:27,265 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-11-29 05:29:27,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:27,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1869924758, now seen corresponding path program 1 times [2023-11-29 05:29:27,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:27,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604566948] [2023-11-29 05:29:27,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:27,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:27,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:29:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:27,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:29:27,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:27,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604566948] [2023-11-29 05:29:27,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604566948] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:29:27,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:29:27,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 05:29:27,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78923970] [2023-11-29 05:29:27,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:29:27,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:29:27,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:27,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:29:27,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:29:27,528 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 7 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 05:29:27,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:29:27,684 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2023-11-29 05:29:27,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:29:27,685 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-11-29 05:29:27,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:29:27,686 INFO L225 Difference]: With dead ends: 50 [2023-11-29 05:29:27,686 INFO L226 Difference]: Without dead ends: 50 [2023-11-29 05:29:27,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:29:27,688 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:29:27,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 128 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:29:27,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-29 05:29:27,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2023-11-29 05:29:27,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 05:29:27,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2023-11-29 05:29:27,694 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 9 [2023-11-29 05:29:27,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:29:27,694 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2023-11-29 05:29:27,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 05:29:27,695 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2023-11-29 05:29:27,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 05:29:27,695 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:27,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:29:27,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 05:29:27,696 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-11-29 05:29:27,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:27,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1709563605, now seen corresponding path program 1 times [2023-11-29 05:29:27,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:27,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188111105] [2023-11-29 05:29:27,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:27,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:27,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:27,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:29:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:27,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:29:27,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:27,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188111105] [2023-11-29 05:29:27,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188111105] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:29:27,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:29:27,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:29:27,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376819679] [2023-11-29 05:29:27,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:29:27,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:29:27,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:27,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:29:27,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:29:27,893 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 05:29:28,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:29:28,059 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2023-11-29 05:29:28,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:29:28,059 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-29 05:29:28,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:29:28,061 INFO L225 Difference]: With dead ends: 54 [2023-11-29 05:29:28,061 INFO L226 Difference]: Without dead ends: 54 [2023-11-29 05:29:28,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:29:28,062 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:29:28,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 136 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:29:28,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-29 05:29:28,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2023-11-29 05:29:28,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 47 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 05:29:28,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2023-11-29 05:29:28,070 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 14 [2023-11-29 05:29:28,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:29:28,070 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2023-11-29 05:29:28,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 05:29:28,071 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2023-11-29 05:29:28,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 05:29:28,071 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:28,071 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:29:28,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 05:29:28,072 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-11-29 05:29:28,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:28,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1709563604, now seen corresponding path program 1 times [2023-11-29 05:29:28,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:28,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386825080] [2023-11-29 05:29:28,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:28,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:28,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:29:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:28,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:29:28,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:28,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386825080] [2023-11-29 05:29:28,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386825080] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:29:28,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:29:28,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:29:28,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312146039] [2023-11-29 05:29:28,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:29:28,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:29:28,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:28,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:29:28,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:29:28,379 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 05:29:28,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:29:28,539 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2023-11-29 05:29:28,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:29:28,540 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-29 05:29:28,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:29:28,541 INFO L225 Difference]: With dead ends: 53 [2023-11-29 05:29:28,541 INFO L226 Difference]: Without dead ends: 53 [2023-11-29 05:29:28,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:29:28,542 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 3 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:29:28,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 141 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:29:28,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-29 05:29:28,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2023-11-29 05:29:28,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 47 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 05:29:28,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2023-11-29 05:29:28,548 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 14 [2023-11-29 05:29:28,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:29:28,548 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2023-11-29 05:29:28,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 05:29:28,548 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2023-11-29 05:29:28,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 05:29:28,549 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:28,549 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:29:28,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 05:29:28,550 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-11-29 05:29:28,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:28,550 INFO L85 PathProgramCache]: Analyzing trace with hash 2080190251, now seen corresponding path program 1 times [2023-11-29 05:29:28,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:28,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006177915] [2023-11-29 05:29:28,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:28,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:28,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:29:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:28,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:29:28,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:28,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006177915] [2023-11-29 05:29:28,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006177915] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:29:28,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:29:28,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:29:28,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787594989] [2023-11-29 05:29:28,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:29:28,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:29:28,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:28,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:29:28,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:29:28,689 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 05:29:28,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:29:28,811 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2023-11-29 05:29:28,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:29:28,811 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-29 05:29:28,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:29:28,812 INFO L225 Difference]: With dead ends: 55 [2023-11-29 05:29:28,812 INFO L226 Difference]: Without dead ends: 55 [2023-11-29 05:29:28,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:29:28,813 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 20 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:29:28,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 193 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:29:28,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-29 05:29:28,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2023-11-29 05:29:28,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 32 states have (on average 1.625) internal successors, (52), 48 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 05:29:28,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2023-11-29 05:29:28,819 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 16 [2023-11-29 05:29:28,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:29:28,819 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2023-11-29 05:29:28,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 05:29:28,820 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2023-11-29 05:29:28,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 05:29:28,820 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:28,820 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:29:28,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 05:29:28,821 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-11-29 05:29:28,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:28,821 INFO L85 PathProgramCache]: Analyzing trace with hash 2081893250, now seen corresponding path program 1 times [2023-11-29 05:29:28,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:28,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253875812] [2023-11-29 05:29:28,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:28,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:29,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:29:29,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:29:29,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:29,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253875812] [2023-11-29 05:29:29,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253875812] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:29:29,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664412172] [2023-11-29 05:29:29,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:29,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:29:29,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:29:29,409 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:29:29,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:29:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:29,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-29 05:29:29,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:29:29,583 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 [2023-11-29 05:29:29,589 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 [2023-11-29 05:29:29,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 05:29:29,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 05:29:29,679 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:29:29,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2023-11-29 05:29:29,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-29 05:29:29,847 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:29:29,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2023-11-29 05:29:29,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-29 05:29:30,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:29:30,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:29:30,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:29:30,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664412172] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:29:30,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:29:30,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2023-11-29 05:29:30,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930717079] [2023-11-29 05:29:30,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:29:30,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 05:29:30,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:30,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 05:29:30,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:29:30,511 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 23 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 05:29:30,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:29:30,914 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2023-11-29 05:29:30,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 05:29:30,915 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 16 [2023-11-29 05:29:30,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:29:30,916 INFO L225 Difference]: With dead ends: 54 [2023-11-29 05:29:30,916 INFO L226 Difference]: Without dead ends: 54 [2023-11-29 05:29:30,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2023-11-29 05:29:30,917 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 4 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:29:30,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 500 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:29:30,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-29 05:29:30,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2023-11-29 05:29:30,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 33 states have (on average 1.606060606060606) internal successors, (53), 49 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 05:29:30,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2023-11-29 05:29:30,922 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 16 [2023-11-29 05:29:30,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:29:30,923 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2023-11-29 05:29:30,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 05:29:30,923 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2023-11-29 05:29:30,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 05:29:30,924 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:30,924 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:29:30,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:29:31,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 05:29:31,130 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-11-29 05:29:31,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:31,130 INFO L85 PathProgramCache]: Analyzing trace with hash -154021097, now seen corresponding path program 1 times [2023-11-29 05:29:31,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:31,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799449058] [2023-11-29 05:29:31,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:31,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:31,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:29:31,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:31,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 05:29:31,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:31,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:29:31,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:31,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799449058] [2023-11-29 05:29:31,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799449058] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:29:31,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422357537] [2023-11-29 05:29:31,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:31,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:29:31,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:29:31,393 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:29:31,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:29:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:31,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:29:31,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:29:31,541 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2023-11-29 05:29:31,575 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-29 05:29:31,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-29 05:29:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:29:31,581 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:29:31,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422357537] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:29:31,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:29:31,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2023-11-29 05:29:31,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414513573] [2023-11-29 05:29:31,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:29:31,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:29:31,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:31,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:29:31,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=70, Unknown=1, NotChecked=16, Total=110 [2023-11-29 05:29:31,583 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 05:29:31,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:29:31,635 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2023-11-29 05:29:31,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:29:31,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-11-29 05:29:31,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:29:31,636 INFO L225 Difference]: With dead ends: 56 [2023-11-29 05:29:31,636 INFO L226 Difference]: Without dead ends: 56 [2023-11-29 05:29:31,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=70, Unknown=1, NotChecked=16, Total=110 [2023-11-29 05:29:31,638 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:29:31,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 59 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 68 Unchecked, 0.0s Time] [2023-11-29 05:29:31,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-29 05:29:31,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2023-11-29 05:29:31,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 50 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:29:31,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2023-11-29 05:29:31,643 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 18 [2023-11-29 05:29:31,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:29:31,643 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2023-11-29 05:29:31,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 05:29:31,643 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2023-11-29 05:29:31,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 05:29:31,644 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:31,644 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:29:31,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:29:31,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 05:29:31,845 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-11-29 05:29:31,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:31,845 INFO L85 PathProgramCache]: Analyzing trace with hash -154021096, now seen corresponding path program 1 times [2023-11-29 05:29:31,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:31,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392113217] [2023-11-29 05:29:31,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:31,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:31,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:32,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:29:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:32,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 05:29:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:32,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:29:32,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:32,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392113217] [2023-11-29 05:29:32,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392113217] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:29:32,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036879761] [2023-11-29 05:29:32,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:32,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:29:32,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:29:32,285 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:29:32,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:29:32,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:32,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 05:29:32,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:29:32,418 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 6 treesize of output 5 [2023-11-29 05:29:32,594 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-11-29 05:29:32,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:29:32,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 05:29:32,631 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 05:29:32,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 05:29:32,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-11-29 05:29:32,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:29:32,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036879761] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:29:32,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:29:32,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2023-11-29 05:29:32,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704718434] [2023-11-29 05:29:32,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:29:32,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 05:29:32,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:32,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 05:29:32,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=396, Unknown=1, NotChecked=40, Total=506 [2023-11-29 05:29:32,779 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 21 states, 17 states have (on average 1.588235294117647) internal successors, (27), 15 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 05:29:33,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:29:33,149 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2023-11-29 05:29:33,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:29:33,150 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.588235294117647) internal successors, (27), 15 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 18 [2023-11-29 05:29:33,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:29:33,151 INFO L225 Difference]: With dead ends: 64 [2023-11-29 05:29:33,151 INFO L226 Difference]: Without dead ends: 64 [2023-11-29 05:29:33,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=465, Unknown=1, NotChecked=44, Total=600 [2023-11-29 05:29:33,152 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:29:33,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 219 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 389 Invalid, 0 Unknown, 61 Unchecked, 0.3s Time] [2023-11-29 05:29:33,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-29 05:29:33,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2023-11-29 05:29:33,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 55 states have internal predecessors, (63), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:29:33,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2023-11-29 05:29:33,158 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 18 [2023-11-29 05:29:33,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:29:33,158 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2023-11-29 05:29:33,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.588235294117647) internal successors, (27), 15 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 05:29:33,158 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2023-11-29 05:29:33,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 05:29:33,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:33,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:29:33,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 05:29:33,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:29:33,365 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-11-29 05:29:33,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:33,365 INFO L85 PathProgramCache]: Analyzing trace with hash -757006398, now seen corresponding path program 1 times [2023-11-29 05:29:33,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:33,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623366259] [2023-11-29 05:29:33,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:33,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:33,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:29:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:33,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:29:33,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:33,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623366259] [2023-11-29 05:29:33,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623366259] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:29:33,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738326388] [2023-11-29 05:29:33,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:33,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:29:33,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:29:33,451 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:29:33,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:29:33,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:33,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 05:29:33,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:29:33,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:29:33,612 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:29:33,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738326388] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:29:33,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:29:33,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-29 05:29:33,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278861117] [2023-11-29 05:29:33,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:29:33,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:29:33,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:33,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:29:33,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:29:33,614 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 05:29:33,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:29:33,741 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2023-11-29 05:29:33,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:29:33,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-11-29 05:29:33,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:29:33,743 INFO L225 Difference]: With dead ends: 84 [2023-11-29 05:29:33,743 INFO L226 Difference]: Without dead ends: 84 [2023-11-29 05:29:33,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:29:33,745 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 48 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:29:33,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 95 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:29:33,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-29 05:29:33,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2023-11-29 05:29:33,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 63 states have internal predecessors, (77), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:29:33,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2023-11-29 05:29:33,751 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 18 [2023-11-29 05:29:33,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:29:33,751 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2023-11-29 05:29:33,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 05:29:33,752 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2023-11-29 05:29:33,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 05:29:33,752 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:33,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:29:33,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:29:33,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:29:33,960 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-11-29 05:29:33,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:33,960 INFO L85 PathProgramCache]: Analyzing trace with hash -757006397, now seen corresponding path program 1 times [2023-11-29 05:29:33,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:33,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223736014] [2023-11-29 05:29:33,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:33,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:33,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:34,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:29:34,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:34,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:29:34,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:34,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223736014] [2023-11-29 05:29:34,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223736014] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:29:34,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:29:34,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:29:34,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207405917] [2023-11-29 05:29:34,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:29:34,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:29:34,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:34,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:29:34,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:29:34,180 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 05:29:34,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:29:34,380 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2023-11-29 05:29:34,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:29:34,381 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-11-29 05:29:34,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:29:34,382 INFO L225 Difference]: With dead ends: 88 [2023-11-29 05:29:34,382 INFO L226 Difference]: Without dead ends: 88 [2023-11-29 05:29:34,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:29:34,383 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 28 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:29:34,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 111 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:29:34,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-29 05:29:34,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 72. [2023-11-29 05:29:34,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 52 states have (on average 1.5769230769230769) internal successors, (82), 67 states have internal predecessors, (82), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:29:34,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2023-11-29 05:29:34,388 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 18 [2023-11-29 05:29:34,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:29:34,389 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2023-11-29 05:29:34,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 05:29:34,389 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2023-11-29 05:29:34,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 05:29:34,390 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:34,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:29:34,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 05:29:34,391 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-11-29 05:29:34,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:34,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1992363304, now seen corresponding path program 1 times [2023-11-29 05:29:34,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:34,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124663940] [2023-11-29 05:29:34,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:34,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:34,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:34,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:29:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:34,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:29:34,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:34,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124663940] [2023-11-29 05:29:34,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124663940] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:29:34,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:29:34,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 05:29:34,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923336698] [2023-11-29 05:29:34,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:29:34,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:29:34,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:34,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:29:34,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:29:34,506 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 05:29:34,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:29:34,652 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2023-11-29 05:29:34,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:29:34,653 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-11-29 05:29:34,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:29:34,654 INFO L225 Difference]: With dead ends: 81 [2023-11-29 05:29:34,654 INFO L226 Difference]: Without dead ends: 81 [2023-11-29 05:29:34,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:29:34,655 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 46 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:29:34,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 176 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:29:34,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-29 05:29:34,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2023-11-29 05:29:34,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 53 states have (on average 1.528301886792453) internal successors, (81), 68 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:29:34,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2023-11-29 05:29:34,660 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 19 [2023-11-29 05:29:34,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:29:34,660 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2023-11-29 05:29:34,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 05:29:34,660 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2023-11-29 05:29:34,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 05:29:34,661 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:34,661 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:29:34,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 05:29:34,662 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-11-29 05:29:34,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:34,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1985306195, now seen corresponding path program 1 times [2023-11-29 05:29:34,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:34,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120756345] [2023-11-29 05:29:34,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:34,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:34,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:34,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:29:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:34,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 05:29:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:29:34,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:34,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120756345] [2023-11-29 05:29:34,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120756345] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:29:34,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:29:34,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:29:34,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404259066] [2023-11-29 05:29:34,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:29:34,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:29:34,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:34,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:29:34,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:29:34,820 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 05:29:34,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:29:34,944 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2023-11-29 05:29:34,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:29:34,944 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-11-29 05:29:34,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:29:34,945 INFO L225 Difference]: With dead ends: 72 [2023-11-29 05:29:34,945 INFO L226 Difference]: Without dead ends: 72 [2023-11-29 05:29:34,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:29:34,946 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:29:34,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 134 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:29:34,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-29 05:29:34,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-11-29 05:29:34,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.490566037735849) internal successors, (79), 67 states have internal predecessors, (79), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:29:34,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2023-11-29 05:29:34,951 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 20 [2023-11-29 05:29:34,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:29:34,951 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2023-11-29 05:29:34,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 05:29:34,952 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2023-11-29 05:29:34,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 05:29:34,952 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:34,953 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:29:34,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 05:29:34,953 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-11-29 05:29:34,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:34,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1985306194, now seen corresponding path program 1 times [2023-11-29 05:29:34,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:34,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177486998] [2023-11-29 05:29:34,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:34,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:34,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:35,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:29:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:35,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 05:29:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:29:35,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:35,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177486998] [2023-11-29 05:29:35,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177486998] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:29:35,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:29:35,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:29:35,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631569087] [2023-11-29 05:29:35,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:29:35,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:29:35,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:35,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:29:35,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:29:35,251 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 05:29:35,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:29:35,388 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2023-11-29 05:29:35,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:29:35,388 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-11-29 05:29:35,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:29:35,389 INFO L225 Difference]: With dead ends: 71 [2023-11-29 05:29:35,389 INFO L226 Difference]: Without dead ends: 71 [2023-11-29 05:29:35,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:29:35,390 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 5 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:29:35,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 143 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:29:35,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-29 05:29:35,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-11-29 05:29:35,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 66 states have internal predecessors, (77), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:29:35,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2023-11-29 05:29:35,395 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 20 [2023-11-29 05:29:35,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:29:35,395 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2023-11-29 05:29:35,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 05:29:35,395 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2023-11-29 05:29:35,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 05:29:35,396 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:35,396 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:29:35,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 05:29:35,397 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-11-29 05:29:35,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:35,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1633644576, now seen corresponding path program 1 times [2023-11-29 05:29:35,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:35,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893518382] [2023-11-29 05:29:35,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:35,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:35,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:29:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:29:35,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:35,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893518382] [2023-11-29 05:29:35,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893518382] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:29:35,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:29:35,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:29:35,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244659627] [2023-11-29 05:29:35,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:29:35,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:29:35,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:35,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:29:35,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:29:35,518 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 05:29:35,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:29:35,662 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2023-11-29 05:29:35,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:29:35,663 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-11-29 05:29:35,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:29:35,664 INFO L225 Difference]: With dead ends: 77 [2023-11-29 05:29:35,664 INFO L226 Difference]: Without dead ends: 77 [2023-11-29 05:29:35,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:29:35,665 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 38 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:29:35,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 146 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:29:35,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-29 05:29:35,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2023-11-29 05:29:35,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 56 states have (on average 1.4821428571428572) internal successors, (83), 69 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:29:35,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2023-11-29 05:29:35,669 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 20 [2023-11-29 05:29:35,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:29:35,670 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2023-11-29 05:29:35,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 05:29:35,670 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2023-11-29 05:29:35,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 05:29:35,671 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:35,671 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:29:35,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-29 05:29:35,671 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-11-29 05:29:35,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:35,672 INFO L85 PathProgramCache]: Analyzing trace with hash -913695245, now seen corresponding path program 1 times [2023-11-29 05:29:35,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:35,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162685361] [2023-11-29 05:29:35,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:35,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:35,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:29:35,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:35,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 05:29:35,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:29:36,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:36,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162685361] [2023-11-29 05:29:36,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162685361] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:29:36,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:29:36,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-29 05:29:36,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510778356] [2023-11-29 05:29:36,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:29:36,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 05:29:36,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:36,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 05:29:36,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:29:36,058 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand has 15 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 05:29:36,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:29:36,291 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2023-11-29 05:29:36,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 05:29:36,292 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-11-29 05:29:36,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:29:36,292 INFO L225 Difference]: With dead ends: 75 [2023-11-29 05:29:36,292 INFO L226 Difference]: Without dead ends: 75 [2023-11-29 05:29:36,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:29:36,294 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 24 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:29:36,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 181 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:29:36,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-29 05:29:36,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2023-11-29 05:29:36,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 56 states have (on average 1.4642857142857142) internal successors, (82), 69 states have internal predecessors, (82), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:29:36,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2023-11-29 05:29:36,297 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 22 [2023-11-29 05:29:36,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:29:36,298 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2023-11-29 05:29:36,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 05:29:36,298 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2023-11-29 05:29:36,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 05:29:36,299 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:36,299 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:29:36,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-29 05:29:36,299 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-11-29 05:29:36,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:36,300 INFO L85 PathProgramCache]: Analyzing trace with hash -913695244, now seen corresponding path program 1 times [2023-11-29 05:29:36,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:36,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358449508] [2023-11-29 05:29:36,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:36,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:36,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:29:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:36,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 05:29:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:36,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:29:36,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:36,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358449508] [2023-11-29 05:29:36,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358449508] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:29:36,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797655056] [2023-11-29 05:29:36,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:36,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:29:36,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:29:36,838 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:29:36,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:29:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:36,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-29 05:29:37,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:29:37,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 05:29:37,052 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 [2023-11-29 05:29:37,135 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 05:29:37,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 05:29:37,169 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 [2023-11-29 05:29:37,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 1 [2023-11-29 05:29:37,263 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-29 05:29:37,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 57 [2023-11-29 05:29:37,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2023-11-29 05:29:37,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2023-11-29 05:29:37,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-11-29 05:29:37,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:29:37,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:29:37,381 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_create_~now~0#1.offset| 4))) (and (forall ((v_ArrVal_1243 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_#t~mem8#1.base| v_ArrVal_1243) |c_ULTIMATE.start_create_~now~0#1.base|) .cse0))) (forall ((v_ArrVal_1243 (Array Int Int)) (v_ArrVal_1242 (Array Int Int))) (<= (+ 4 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_#t~mem8#1.base| v_ArrVal_1243) |c_ULTIMATE.start_create_~now~0#1.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~mem8#1.base| v_ArrVal_1242) |c_ULTIMATE.start_create_~now~0#1.base|) .cse0)))))) is different from false [2023-11-29 05:29:37,394 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_create_~now~0#1.offset| 4))) (let ((.cse0 (select (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~now~0#1.base|) .cse1))) (and (forall ((v_ArrVal_1243 (Array Int Int)) (v_ArrVal_1242 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$#0.offset| .cse0 v_ArrVal_1243) |c_ULTIMATE.start_create_~now~0#1.base|) .cse1) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| .cse0 v_ArrVal_1242) |c_ULTIMATE.start_create_~now~0#1.base|) .cse1)))) (forall ((v_ArrVal_1243 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$#0.offset| .cse0 v_ArrVal_1243) |c_ULTIMATE.start_create_~now~0#1.base|) .cse1)))))) is different from false [2023-11-29 05:29:37,403 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:29:37,404 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-11-29 05:29:37,408 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 40 treesize of output 28 [2023-11-29 05:29:37,419 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:29:37,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 46 [2023-11-29 05:29:37,426 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:29:37,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2023-11-29 05:29:37,429 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:29:37,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2023-11-29 05:29:37,435 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:29:37,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-11-29 05:29:37,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:29:37,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797655056] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:29:37,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:29:37,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 32 [2023-11-29 05:29:37,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521772175] [2023-11-29 05:29:37,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:29:37,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 05:29:37,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:37,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 05:29:37,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=845, Unknown=2, NotChecked=118, Total=1056 [2023-11-29 05:29:37,821 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand has 33 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 25 states have internal predecessors, (46), 3 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-29 05:29:38,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:29:38,487 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2023-11-29 05:29:38,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 05:29:38,487 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 25 states have internal predecessors, (46), 3 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 22 [2023-11-29 05:29:38,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:29:38,488 INFO L225 Difference]: With dead ends: 74 [2023-11-29 05:29:38,488 INFO L226 Difference]: Without dead ends: 74 [2023-11-29 05:29:38,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=150, Invalid=1188, Unknown=2, NotChecked=142, Total=1482 [2023-11-29 05:29:38,489 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 40 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:29:38,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 302 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 398 Invalid, 0 Unknown, 74 Unchecked, 0.4s Time] [2023-11-29 05:29:38,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-29 05:29:38,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-11-29 05:29:38,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 69 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:29:38,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2023-11-29 05:29:38,493 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 22 [2023-11-29 05:29:38,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:29:38,493 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2023-11-29 05:29:38,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 25 states have internal predecessors, (46), 3 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-29 05:29:38,494 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2023-11-29 05:29:38,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 05:29:38,494 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:38,495 INFO L195 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] [2023-11-29 05:29:38,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:29:38,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 05:29:38,701 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-11-29 05:29:38,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:38,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1631005853, now seen corresponding path program 1 times [2023-11-29 05:29:38,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:38,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149126296] [2023-11-29 05:29:38,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:38,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:38,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:39,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:29:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:39,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:29:39,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:39,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149126296] [2023-11-29 05:29:39,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149126296] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:29:39,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647780810] [2023-11-29 05:29:39,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:39,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:29:39,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:29:39,084 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:29:39,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:29:39,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:39,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 05:29:39,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:29:39,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:29:39,377 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:29:39,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-11-29 05:29:39,386 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:29:39,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-11-29 05:29:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:29:39,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:29:39,543 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-29 05:29:39,543 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 26 treesize of output 23 [2023-11-29 05:29:39,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-11-29 05:29:39,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-11-29 05:29:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:29:39,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647780810] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:29:39,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:29:39,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2023-11-29 05:29:39,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885151463] [2023-11-29 05:29:39,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:29:39,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 05:29:39,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:39,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 05:29:39,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:29:39,652 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand has 23 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 05:29:40,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:29:40,048 INFO L93 Difference]: Finished difference Result 99 states and 118 transitions. [2023-11-29 05:29:40,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 05:29:40,048 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-11-29 05:29:40,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:29:40,049 INFO L225 Difference]: With dead ends: 99 [2023-11-29 05:29:40,049 INFO L226 Difference]: Without dead ends: 99 [2023-11-29 05:29:40,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2023-11-29 05:29:40,050 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 84 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:29:40,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 256 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:29:40,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-29 05:29:40,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2023-11-29 05:29:40,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 69 states have (on average 1.4927536231884058) internal successors, (103), 82 states have internal predecessors, (103), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:29:40,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2023-11-29 05:29:40,055 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 23 [2023-11-29 05:29:40,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:29:40,055 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2023-11-29 05:29:40,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 05:29:40,055 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2023-11-29 05:29:40,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-29 05:29:40,056 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:40,056 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:29:40,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 05:29:40,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:29:40,259 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-11-29 05:29:40,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:40,259 INFO L85 PathProgramCache]: Analyzing trace with hash 978424663, now seen corresponding path program 1 times [2023-11-29 05:29:40,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:40,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140594078] [2023-11-29 05:29:40,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:40,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:40,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:29:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:40,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:29:40,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:40,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140594078] [2023-11-29 05:29:40,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140594078] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:29:40,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411050646] [2023-11-29 05:29:40,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:40,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:29:40,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:29:40,446 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:29:40,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:29:40,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:40,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 05:29:40,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:29:40,657 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 13 treesize of output 9 [2023-11-29 05:29:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:29:40,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:29:40,746 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_create_#t~ret4#1.base_27| Int)) (or (= (store |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_27| 0) |c_ULTIMATE.start_main_old_#valid#1|) (not (= (select |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_27|) 0)))) is different from false [2023-11-29 05:29:40,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411050646] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:29:40,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:29:40,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2023-11-29 05:29:40,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053196084] [2023-11-29 05:29:40,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:29:40,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:29:40,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:40,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:29:40,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=110, Unknown=1, NotChecked=20, Total=156 [2023-11-29 05:29:40,749 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand has 12 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 05:29:40,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:29:40,941 INFO L93 Difference]: Finished difference Result 93 states and 114 transitions. [2023-11-29 05:29:40,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 05:29:40,942 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-11-29 05:29:40,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:29:40,943 INFO L225 Difference]: With dead ends: 93 [2023-11-29 05:29:40,943 INFO L226 Difference]: Without dead ends: 80 [2023-11-29 05:29:40,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=175, Unknown=1, NotChecked=26, Total=240 [2023-11-29 05:29:40,944 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:29:40,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 150 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:29:40,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-29 05:29:40,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-11-29 05:29:40,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.532258064516129) internal successors, (95), 75 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:29:40,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 101 transitions. [2023-11-29 05:29:40,949 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 101 transitions. Word has length 24 [2023-11-29 05:29:40,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:29:40,949 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 101 transitions. [2023-11-29 05:29:40,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 05:29:40,949 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 101 transitions. [2023-11-29 05:29:40,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 05:29:40,950 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:40,950 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:29:40,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 05:29:41,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:29:41,155 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-11-29 05:29:41,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:41,155 INFO L85 PathProgramCache]: Analyzing trace with hash 804858780, now seen corresponding path program 1 times [2023-11-29 05:29:41,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:41,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369103739] [2023-11-29 05:29:41,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:41,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:41,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:29:41,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:41,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 05:29:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:41,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 05:29:41,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:41,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369103739] [2023-11-29 05:29:41,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369103739] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:29:41,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035309274] [2023-11-29 05:29:41,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:41,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:29:41,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:29:41,294 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:29:41,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:29:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:41,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 05:29:41,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:29:41,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 05:29:41,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:29:41,511 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 05:29:41,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-11-29 05:29:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 05:29:41,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035309274] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:29:41,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:29:41,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 6 [2023-11-29 05:29:41,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041868492] [2023-11-29 05:29:41,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:29:41,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:29:41,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:41,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:29:41,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:29:41,523 INFO L87 Difference]: Start difference. First operand 80 states and 101 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 05:29:41,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:29:41,620 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2023-11-29 05:29:41,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:29:41,621 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-11-29 05:29:41,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:29:41,622 INFO L225 Difference]: With dead ends: 82 [2023-11-29 05:29:41,622 INFO L226 Difference]: Without dead ends: 82 [2023-11-29 05:29:41,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:29:41,623 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:29:41,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 126 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:29:41,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-29 05:29:41,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2023-11-29 05:29:41,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.5161290322580645) internal successors, (94), 75 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:29:41,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 100 transitions. [2023-11-29 05:29:41,626 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 100 transitions. Word has length 28 [2023-11-29 05:29:41,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:29:41,627 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 100 transitions. [2023-11-29 05:29:41,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 05:29:41,627 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 100 transitions. [2023-11-29 05:29:41,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 05:29:41,628 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:41,628 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:29:41,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:29:41,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 05:29:41,829 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-11-29 05:29:41,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:41,829 INFO L85 PathProgramCache]: Analyzing trace with hash 804858781, now seen corresponding path program 1 times [2023-11-29 05:29:41,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:41,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653364472] [2023-11-29 05:29:41,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:41,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:42,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:29:42,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:42,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 05:29:42,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:42,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:29:42,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:42,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653364472] [2023-11-29 05:29:42,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653364472] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:29:42,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520159657] [2023-11-29 05:29:42,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:42,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:29:42,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:29:42,108 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:29:42,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:29:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:42,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 05:29:42,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:29:42,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 05:29:42,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:29:42,447 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:29:42,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2023-11-29 05:29:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 05:29:42,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520159657] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:29:42,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:29:42,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 17 [2023-11-29 05:29:42,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337485137] [2023-11-29 05:29:42,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:29:42,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 05:29:42,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:42,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 05:29:42,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:29:42,529 INFO L87 Difference]: Start difference. First operand 80 states and 100 transitions. Second operand has 18 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-29 05:29:42,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:29:42,675 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2023-11-29 05:29:42,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:29:42,676 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 28 [2023-11-29 05:29:42,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:29:42,676 INFO L225 Difference]: With dead ends: 81 [2023-11-29 05:29:42,676 INFO L226 Difference]: Without dead ends: 81 [2023-11-29 05:29:42,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:29:42,677 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 3 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:29:42,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 282 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:29:42,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-29 05:29:42,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2023-11-29 05:29:42,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.5) internal successors, (93), 75 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:29:42,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2023-11-29 05:29:42,682 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 28 [2023-11-29 05:29:42,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:29:42,682 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2023-11-29 05:29:42,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-29 05:29:42,682 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2023-11-29 05:29:42,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 05:29:42,683 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:42,683 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:29:42,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 05:29:42,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 05:29:42,889 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-11-29 05:29:42,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:42,889 INFO L85 PathProgramCache]: Analyzing trace with hash 375217587, now seen corresponding path program 1 times [2023-11-29 05:29:42,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:42,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507546506] [2023-11-29 05:29:42,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:42,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:42,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:43,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:29:43,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:43,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 05:29:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:43,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:29:43,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:43,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507546506] [2023-11-29 05:29:43,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507546506] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:29:43,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987039868] [2023-11-29 05:29:43,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:43,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:29:43,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:29:43,688 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:29:43,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 05:29:43,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:43,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-29 05:29:43,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:29:44,033 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-29 05:29:44,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-29 05:29:44,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 1 [2023-11-29 05:29:44,191 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-29 05:29:44,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2023-11-29 05:29:44,262 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-29 05:29:44,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2023-11-29 05:29:44,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2023-11-29 05:29:44,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:29:44,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:29:44,490 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1910 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_1910) |c_ULTIMATE.start_create_~dll~0#1.base|) (+ |c_ULTIMATE.start_create_~dll~0#1.offset| 4))) 1)) is different from false [2023-11-29 05:29:44,504 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1910 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$#0.base| (select (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~now~0#1.base|) (+ |c_ULTIMATE.start_create_~now~0#1.offset| 4)) v_ArrVal_1910) |c_ULTIMATE.start_create_~dll~0#1.base|) (+ |c_ULTIMATE.start_create_~dll~0#1.offset| 4))) 1)) is different from false [2023-11-29 05:29:44,510 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1910 (Array Int Int)) (v_ArrVal_1909 (Array Int Int))) (= (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~mem8#1.base| v_ArrVal_1909))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_create_~now~0#1.base|) (+ |c_ULTIMATE.start_create_~now~0#1.offset| 4)) v_ArrVal_1910)) |c_ULTIMATE.start_create_~dll~0#1.base|) (+ |c_ULTIMATE.start_create_~dll~0#1.offset| 4))) 1)) is different from false [2023-11-29 05:29:44,585 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:29:44,585 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 37 [2023-11-29 05:29:44,593 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:29:44,593 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 170 treesize of output 145 [2023-11-29 05:29:44,601 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 94 treesize of output 86 [2023-11-29 05:29:44,609 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:29:44,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 74 [2023-11-29 05:29:45,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987039868] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:29:45,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:29:45,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 30 [2023-11-29 05:29:45,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598566726] [2023-11-29 05:29:45,454 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:29:45,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 05:29:45,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:45,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 05:29:45,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1125, Unknown=16, NotChecked=210, Total=1482 [2023-11-29 05:29:45,456 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand has 31 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 05:29:46,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:29:46,021 INFO L93 Difference]: Finished difference Result 83 states and 103 transitions. [2023-11-29 05:29:46,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 05:29:46,021 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2023-11-29 05:29:46,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:29:46,022 INFO L225 Difference]: With dead ends: 83 [2023-11-29 05:29:46,022 INFO L226 Difference]: Without dead ends: 83 [2023-11-29 05:29:46,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=228, Invalid=1747, Unknown=17, NotChecked=264, Total=2256 [2023-11-29 05:29:46,023 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 20 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:29:46,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 359 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:29:46,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-29 05:29:46,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2023-11-29 05:29:46,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.507936507936508) internal successors, (95), 76 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:29:46,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2023-11-29 05:29:46,027 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 30 [2023-11-29 05:29:46,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:29:46,028 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2023-11-29 05:29:46,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 05:29:46,028 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2023-11-29 05:29:46,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 05:29:46,028 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:46,029 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:29:46,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 05:29:46,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 05:29:46,230 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-11-29 05:29:46,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:46,231 INFO L85 PathProgramCache]: Analyzing trace with hash 375217588, now seen corresponding path program 1 times [2023-11-29 05:29:46,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:46,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601920418] [2023-11-29 05:29:46,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:46,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:46,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:47,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:29:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:47,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 05:29:47,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:29:47,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:47,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601920418] [2023-11-29 05:29:47,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601920418] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:29:47,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571632581] [2023-11-29 05:29:47,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:47,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:29:47,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:29:47,283 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:29:47,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 05:29:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:47,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-29 05:29:47,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:29:47,479 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 6 treesize of output 5 [2023-11-29 05:29:47,592 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 [2023-11-29 05:29:47,675 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 05:29:47,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 05:29:47,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 1 [2023-11-29 05:29:47,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 05:29:47,833 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-29 05:29:47,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 57 [2023-11-29 05:29:47,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2023-11-29 05:29:47,909 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-29 05:29:47,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 57 [2023-11-29 05:29:47,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2023-11-29 05:29:48,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2023-11-29 05:29:48,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-11-29 05:29:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:29:48,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:29:48,330 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_ULTIMATE.start_create_~dll~0#1.offset| 4)) (.cse1 (+ |c_ULTIMATE.start_create_~now~0#1.offset| 4))) (and (forall ((v_ArrVal_2087 (Array Int Int))) (let ((.cse0 (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_#t~mem8#1.base| v_ArrVal_2087))) (or (< (select (select .cse0 |c_ULTIMATE.start_create_~now~0#1.base|) .cse1) 0) (forall ((v_ArrVal_2088 (Array Int Int)) (v_ArrVal_2086 (Array Int Int))) (<= 0 (+ (select (select (store .cse0 (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~mem8#1.base| v_ArrVal_2086) |c_ULTIMATE.start_create_~now~0#1.base|) .cse1) v_ArrVal_2088) |c_ULTIMATE.start_create_~dll~0#1.base|) .cse2) 4)))))) (forall ((v_ArrVal_2087 (Array Int Int))) (let ((.cse3 (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_#t~mem8#1.base| v_ArrVal_2087))) (or (forall ((v_ArrVal_2089 (Array Int Int)) (v_ArrVal_2088 (Array Int Int)) (v_ArrVal_2086 (Array Int Int))) (let ((.cse5 (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~mem8#1.base| v_ArrVal_2086))) (let ((.cse4 (select (select .cse5 |c_ULTIMATE.start_create_~now~0#1.base|) .cse1))) (<= (+ 12 (select (select (store .cse3 .cse4 v_ArrVal_2088) |c_ULTIMATE.start_create_~dll~0#1.base|) .cse2)) (select |c_#length| (select (select (store .cse5 .cse4 v_ArrVal_2089) |c_ULTIMATE.start_create_~dll~0#1.base|) .cse2)))))) (< (select (select .cse3 |c_ULTIMATE.start_create_~now~0#1.base|) .cse1) 0)))))) is different from false [2023-11-29 05:29:48,349 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse4 (+ |c_ULTIMATE.start_create_~now~0#1.offset| 4))) (let ((.cse2 (+ |c_ULTIMATE.start_create_~dll~0#1.offset| 4)) (.cse5 (select (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~now~0#1.base|) .cse4))) (and (forall ((v_ArrVal_2087 (Array Int Int))) (let ((.cse0 (store |c_#memory_$Pointer$#0.offset| .cse5 v_ArrVal_2087))) (or (forall ((v_ArrVal_2089 (Array Int Int)) (v_ArrVal_2088 (Array Int Int)) (v_ArrVal_2086 (Array Int Int))) (let ((.cse3 (store |c_#memory_$Pointer$#0.base| .cse5 v_ArrVal_2086))) (let ((.cse1 (select (select .cse3 |c_ULTIMATE.start_create_~now~0#1.base|) .cse4))) (<= (+ 12 (select (select (store .cse0 .cse1 v_ArrVal_2088) |c_ULTIMATE.start_create_~dll~0#1.base|) .cse2)) (select |c_#length| (select (select (store .cse3 .cse1 v_ArrVal_2089) |c_ULTIMATE.start_create_~dll~0#1.base|) .cse2)))))) (< (select (select .cse0 |c_ULTIMATE.start_create_~now~0#1.base|) .cse4) 0)))) (forall ((v_ArrVal_2087 (Array Int Int))) (let ((.cse6 (store |c_#memory_$Pointer$#0.offset| .cse5 v_ArrVal_2087))) (or (forall ((v_ArrVal_2088 (Array Int Int)) (v_ArrVal_2086 (Array Int Int))) (<= 0 (+ (select (select (store .cse6 (select (select (store |c_#memory_$Pointer$#0.base| .cse5 v_ArrVal_2086) |c_ULTIMATE.start_create_~now~0#1.base|) .cse4) v_ArrVal_2088) |c_ULTIMATE.start_create_~dll~0#1.base|) .cse2) 4))) (< (select (select .cse6 |c_ULTIMATE.start_create_~now~0#1.base|) .cse4) 0))))))) is different from false [2023-11-29 05:29:48,367 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:29:48,367 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 153 [2023-11-29 05:29:48,376 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:29:48,377 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 113 [2023-11-29 05:29:48,390 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:29:48,390 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 480 treesize of output 419 [2023-11-29 05:29:48,430 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:29:48,430 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 845 treesize of output 784 [2023-11-29 05:29:48,447 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 369 treesize of output 353 [2023-11-29 05:29:48,464 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:29:48,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 353 treesize of output 326 [2023-11-29 05:29:48,477 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 317 treesize of output 301 [2023-11-29 05:29:48,496 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:29:48,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 301 treesize of output 298 [2023-11-29 05:29:48,515 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:29:48,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 289 treesize of output 290 [2023-11-29 05:29:48,529 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 281 treesize of output 273 [2023-11-29 05:29:48,542 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 273 treesize of output 261 [2023-11-29 05:29:49,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571632581] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:29:49,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:29:49,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2023-11-29 05:29:49,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839376053] [2023-11-29 05:29:49,396 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:29:49,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 05:29:49,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:49,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 05:29:49,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1288, Unknown=2, NotChecked=146, Total=1560 [2023-11-29 05:29:49,398 INFO L87 Difference]: Start difference. First operand 81 states and 101 transitions. Second operand has 31 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 05:29:50,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:29:50,096 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2023-11-29 05:29:50,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:29:50,096 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2023-11-29 05:29:50,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:29:50,097 INFO L225 Difference]: With dead ends: 82 [2023-11-29 05:29:50,098 INFO L226 Difference]: Without dead ends: 82 [2023-11-29 05:29:50,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=202, Invalid=1784, Unknown=2, NotChecked=174, Total=2162 [2023-11-29 05:29:50,099 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 11 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:29:50,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 508 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:29:50,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-29 05:29:50,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2023-11-29 05:29:50,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.492063492063492) internal successors, (94), 76 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:29:50,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2023-11-29 05:29:50,104 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 30 [2023-11-29 05:29:50,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:29:50,104 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2023-11-29 05:29:50,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 05:29:50,104 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2023-11-29 05:29:50,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 05:29:50,105 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:50,105 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:29:50,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 05:29:50,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 05:29:50,312 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-11-29 05:29:50,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:50,312 INFO L85 PathProgramCache]: Analyzing trace with hash 408173832, now seen corresponding path program 1 times [2023-11-29 05:29:50,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:50,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164210455] [2023-11-29 05:29:50,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:50,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:50,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:29:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:50,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 05:29:50,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:50,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-29 05:29:50,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:50,778 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:29:50,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:50,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164210455] [2023-11-29 05:29:50,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164210455] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:29:50,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916698001] [2023-11-29 05:29:50,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:50,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:29:50,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:29:50,779 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:29:50,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 05:29:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:50,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 05:29:50,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:29:51,022 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-29 05:29:51,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-29 05:29:51,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 1 [2023-11-29 05:29:51,115 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-29 05:29:51,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2023-11-29 05:29:51,163 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-29 05:29:51,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2023-11-29 05:29:51,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2023-11-29 05:29:51,221 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2023-11-29 05:29:51,255 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2023-11-29 05:29:51,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 28 [2023-11-29 05:29:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2023-11-29 05:29:51,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:29:51,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916698001] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:29:51,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:29:51,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 26 [2023-11-29 05:29:51,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172984009] [2023-11-29 05:29:51,305 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:29:51,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 05:29:51,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:51,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 05:29:51,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=599, Unknown=1, NotChecked=50, Total=756 [2023-11-29 05:29:51,307 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand has 27 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-29 05:29:51,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:29:51,528 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2023-11-29 05:29:51,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:29:51,528 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 32 [2023-11-29 05:29:51,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:29:51,529 INFO L225 Difference]: With dead ends: 79 [2023-11-29 05:29:51,529 INFO L226 Difference]: Without dead ends: 79 [2023-11-29 05:29:51,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=642, Unknown=1, NotChecked=52, Total=812 [2023-11-29 05:29:51,529 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 19 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:29:51,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 227 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 349 Invalid, 0 Unknown, 44 Unchecked, 0.2s Time] [2023-11-29 05:29:51,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-29 05:29:51,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-11-29 05:29:51,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 63 states have (on average 1.4603174603174602) internal successors, (92), 74 states have internal predecessors, (92), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:29:51,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2023-11-29 05:29:51,532 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 32 [2023-11-29 05:29:51,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:29:51,532 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2023-11-29 05:29:51,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-29 05:29:51,532 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2023-11-29 05:29:51,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 05:29:51,533 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:51,533 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:29:51,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 05:29:51,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 05:29:51,733 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-11-29 05:29:51,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:51,734 INFO L85 PathProgramCache]: Analyzing trace with hash 408173833, now seen corresponding path program 1 times [2023-11-29 05:29:51,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:51,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489327588] [2023-11-29 05:29:51,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:51,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:52,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:29:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:52,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 05:29:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:52,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-29 05:29:52,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:52,296 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:29:52,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:52,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489327588] [2023-11-29 05:29:52,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489327588] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:29:52,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067378943] [2023-11-29 05:29:52,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:52,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:29:52,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:29:52,298 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:29:52,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 05:29:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:52,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 05:29:52,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:29:52,605 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-29 05:29:52,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-29 05:29:52,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 1 [2023-11-29 05:29:52,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 05:29:52,755 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-29 05:29:52,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 74 [2023-11-29 05:29:52,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 30 [2023-11-29 05:29:52,837 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-29 05:29:52,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 74 [2023-11-29 05:29:52,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 30 [2023-11-29 05:29:52,854 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 50 treesize of output 26 [2023-11-29 05:29:52,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2023-11-29 05:29:52,955 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-11-29 05:29:52,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:29:52,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 05:29:52,990 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-29 05:29:52,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-29 05:29:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-11-29 05:29:53,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:29:53,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067378943] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:29:53,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:29:53,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2023-11-29 05:29:53,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414488554] [2023-11-29 05:29:53,117 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:29:53,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 05:29:53,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:53,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 05:29:53,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=787, Unknown=1, NotChecked=56, Total=930 [2023-11-29 05:29:53,120 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand has 29 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 22 states have internal predecessors, (49), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-29 05:29:53,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:29:53,674 INFO L93 Difference]: Finished difference Result 75 states and 94 transitions. [2023-11-29 05:29:53,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:29:53,675 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 22 states have internal predecessors, (49), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 32 [2023-11-29 05:29:53,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:29:53,675 INFO L225 Difference]: With dead ends: 75 [2023-11-29 05:29:53,675 INFO L226 Difference]: Without dead ends: 75 [2023-11-29 05:29:53,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=202, Invalid=1441, Unknown=1, NotChecked=78, Total=1722 [2023-11-29 05:29:53,677 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 33 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:29:53,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 274 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 460 Invalid, 0 Unknown, 46 Unchecked, 0.2s Time] [2023-11-29 05:29:53,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-29 05:29:53,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-11-29 05:29:53,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 70 states have internal predecessors, (88), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:29:53,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2023-11-29 05:29:53,680 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 32 [2023-11-29 05:29:53,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:29:53,680 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2023-11-29 05:29:53,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 22 states have internal predecessors, (49), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-29 05:29:53,681 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2023-11-29 05:29:53,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 05:29:53,681 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:53,681 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:29:53,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 05:29:53,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 05:29:53,881 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-11-29 05:29:53,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:53,882 INFO L85 PathProgramCache]: Analyzing trace with hash -194811468, now seen corresponding path program 1 times [2023-11-29 05:29:53,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:53,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839554724] [2023-11-29 05:29:53,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:53,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:54,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:29:54,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:54,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 05:29:54,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:54,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:29:54,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:54,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839554724] [2023-11-29 05:29:54,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839554724] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:29:54,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045046457] [2023-11-29 05:29:54,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:54,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:29:54,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:29:54,077 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:29:54,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 05:29:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:54,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 05:29:54,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:29:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:29:54,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:29:54,510 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:29:54,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2023-11-29 05:29:54,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:29:54,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045046457] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:29:54,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:29:54,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 19 [2023-11-29 05:29:54,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657857923] [2023-11-29 05:29:54,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:29:54,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 05:29:54,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:54,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 05:29:54,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:29:54,587 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 20 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-29 05:29:54,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:29:54,887 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2023-11-29 05:29:54,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 05:29:54,888 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 32 [2023-11-29 05:29:54,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:29:54,889 INFO L225 Difference]: With dead ends: 79 [2023-11-29 05:29:54,889 INFO L226 Difference]: Without dead ends: 79 [2023-11-29 05:29:54,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2023-11-29 05:29:54,889 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:29:54,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 222 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:29:54,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-29 05:29:54,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2023-11-29 05:29:54,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 70 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:29:54,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2023-11-29 05:29:54,892 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 32 [2023-11-29 05:29:54,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:29:54,892 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2023-11-29 05:29:54,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-29 05:29:54,892 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2023-11-29 05:29:54,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 05:29:54,893 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:29:54,893 INFO L195 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] [2023-11-29 05:29:54,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-29 05:29:55,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 05:29:55,094 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-11-29 05:29:55,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:55,094 INFO L85 PathProgramCache]: Analyzing trace with hash -193108470, now seen corresponding path program 2 times [2023-11-29 05:29:55,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:55,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591250973] [2023-11-29 05:29:55,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:55,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:56,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:29:56,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:56,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 05:29:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:56,413 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:29:56,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:56,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591250973] [2023-11-29 05:29:56,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591250973] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:29:56,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622877542] [2023-11-29 05:29:56,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:29:56,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:29:56,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:29:56,415 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:29:56,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b89e99a-be3b-4150-bcca-eed6b7d702aa/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 05:29:56,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:29:56,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:29:56,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 98 conjunts are in the unsatisfiable core [2023-11-29 05:29:56,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:29:56,788 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 [2023-11-29 05:29:56,794 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 [2023-11-29 05:29:56,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 05:29:56,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 05:29:56,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-29 05:29:56,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-29 05:29:56,930 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 05:29:56,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 05:29:56,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2023-11-29 05:29:57,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2023-11-29 05:29:57,150 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 05:29:57,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 60 [2023-11-29 05:29:57,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2023-11-29 05:29:57,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:29:57,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:29:57,293 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 05:29:57,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 75 [2023-11-29 05:29:57,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:29:57,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:29:57,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 39 [2023-11-29 05:29:57,614 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:29:57,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:40:07,427 INFO L349 Elim1Store]: treesize reduction 262, result has 35.1 percent of original size [2023-11-29 05:40:07,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 29 case distinctions, treesize of input 344863 treesize of output 187712 [2023-11-29 05:40:13,506 INFO L349 Elim1Store]: treesize reduction 633, result has 32.2 percent of original size [2023-11-29 05:40:13,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 29 case distinctions, treesize of input 378624 treesize of output 297103 [2023-11-29 05:40:15,450 INFO L224 Elim1Store]: Index analysis took 171 ms [2023-11-29 05:40:17,138 INFO L349 Elim1Store]: treesize reduction 729, result has 30.2 percent of original size [2023-11-29 05:40:17,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 37 case distinctions, treesize of input 45376 treesize of output 43962 [2023-11-29 05:40:17,756 INFO L224 Elim1Store]: Index analysis took 178 ms [2023-11-29 05:40:19,916 INFO L349 Elim1Store]: treesize reduction 8, result has 98.7 percent of original size [2023-11-29 05:40:19,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 43723 treesize of output 43969 [2023-11-29 05:40:23,069 INFO L349 Elim1Store]: treesize reduction 337, result has 33.4 percent of original size [2023-11-29 05:40:23,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 37 case distinctions, treesize of input 44321 treesize of output 33773 [2023-11-29 05:40:26,221 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:40:26,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 48904 treesize of output 37978