./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/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_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/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 32bit --witnessprinter.graph.data.programhash db322df1d89bf1549765f136e3e3b8000484c0c3108c31998992cf725d6dcc20 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:34:07,354 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:34:07,420 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 05:34:07,425 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:34:07,426 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:34:07,452 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:34:07,453 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:34:07,453 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:34:07,454 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:34:07,454 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:34:07,455 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:34:07,455 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:34:07,456 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:34:07,456 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:34:07,457 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:34:07,458 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:34:07,458 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:34:07,459 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:34:07,459 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:34:07,460 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:34:07,460 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 05:34:07,461 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 05:34:07,461 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 05:34:07,462 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:34:07,462 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 05:34:07,462 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 05:34:07,463 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:34:07,463 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:34:07,464 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:34:07,464 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:34:07,465 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:34:07,465 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:34:07,465 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:34:07,466 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:34:07,466 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:34:07,467 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:34:07,467 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:34:07,467 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:34:07,468 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:34:07,468 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:34:07,468 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:34:07,469 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_6841a496-e68c-4076-b4fb-edd70864f7fd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db322df1d89bf1549765f136e3e3b8000484c0c3108c31998992cf725d6dcc20 [2023-11-29 05:34:07,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:34:07,721 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:34:07,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:34:07,725 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:34:07,725 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:34:07,726 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i [2023-11-29 05:34:10,528 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:34:10,748 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:34:10,749 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i [2023-11-29 05:34:10,763 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/data/12894b9c0/bc3fb47bdb3146afb19575d8ebbeffdd/FLAG2c0c0c3ea [2023-11-29 05:34:10,776 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/data/12894b9c0/bc3fb47bdb3146afb19575d8ebbeffdd [2023-11-29 05:34:10,778 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:34:10,780 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:34:10,781 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:34:10,781 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:34:10,786 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:34:10,786 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:34:10" (1/1) ... [2023-11-29 05:34:10,787 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a998e72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:34:10, skipping insertion in model container [2023-11-29 05:34:10,788 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:34:10" (1/1) ... [2023-11-29 05:34:10,829 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:34:11,082 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:34:11,090 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:34:11,140 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:34:11,167 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:34:11,168 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:34:11 WrapperNode [2023-11-29 05:34:11,168 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:34:11,169 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:34:11,169 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:34:11,169 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:34:11,175 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:34:11" (1/1) ... [2023-11-29 05:34:11,193 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:34:11" (1/1) ... [2023-11-29 05:34:11,226 INFO L138 Inliner]: procedures = 125, calls = 95, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 313 [2023-11-29 05:34:11,227 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:34:11,228 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:34:11,228 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:34:11,228 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:34:11,241 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:34:11" (1/1) ... [2023-11-29 05:34:11,241 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:34:11" (1/1) ... [2023-11-29 05:34:11,248 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:34:11" (1/1) ... [2023-11-29 05:34:11,283 INFO L175 MemorySlicer]: Split 66 memory accesses to 3 slices as follows [2, 10, 54]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 11 writes are split as follows [0, 5, 6]. [2023-11-29 05:34:11,284 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:34:11" (1/1) ... [2023-11-29 05:34:11,284 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:34:11" (1/1) ... [2023-11-29 05:34:11,302 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:34:11" (1/1) ... [2023-11-29 05:34:11,306 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:34:11" (1/1) ... [2023-11-29 05:34:11,308 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:34:11" (1/1) ... [2023-11-29 05:34:11,310 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:34:11" (1/1) ... [2023-11-29 05:34:11,314 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:34:11,314 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:34:11,314 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:34:11,315 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:34:11,315 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:34:11" (1/1) ... [2023-11-29 05:34:11,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:34:11,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:34:11,342 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:34:11,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:34:11,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 05:34:11,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 05:34:11,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 05:34:11,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 05:34:11,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 05:34:11,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 05:34:11,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 05:34:11,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:34:11,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-29 05:34:11,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-29 05:34:11,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-29 05:34:11,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-29 05:34:11,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-29 05:34:11,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-29 05:34:11,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:34:11,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:34:11,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 05:34:11,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 05:34:11,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:34:11,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:34:11,374 INFO L130 BoogieDeclarations]: Found specification of procedure append [2023-11-29 05:34:11,374 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2023-11-29 05:34:11,496 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:34:11,497 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:34:12,155 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:34:12,220 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:34:12,220 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-29 05:34:12,221 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:34:12 BoogieIcfgContainer [2023-11-29 05:34:12,221 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:34:12,224 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:34:12,224 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:34:12,227 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:34:12,228 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:34:10" (1/3) ... [2023-11-29 05:34:12,228 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@737ed95a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:34:12, skipping insertion in model container [2023-11-29 05:34:12,229 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:34:11" (2/3) ... [2023-11-29 05:34:12,229 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@737ed95a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:34:12, skipping insertion in model container [2023-11-29 05:34:12,229 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:34:12" (3/3) ... [2023-11-29 05:34:12,230 INFO L112 eAbstractionObserver]: Analyzing ICFG split_list_test05-2.i [2023-11-29 05:34:12,249 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:34:12,250 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 147 error locations. [2023-11-29 05:34:12,304 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:34:12,311 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;@2ec9c304, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:34:12,311 INFO L358 AbstractCegarLoop]: Starting to check reachability of 147 error locations. [2023-11-29 05:34:12,316 INFO L276 IsEmpty]: Start isEmpty. Operand has 293 states, 129 states have (on average 2.4031007751937983) internal successors, (310), 278 states have internal predecessors, (310), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-29 05:34:12,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-29 05:34:12,322 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:34:12,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-29 05:34:12,323 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-29 05:34:12,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:34:12,329 INFO L85 PathProgramCache]: Analyzing trace with hash 18387, now seen corresponding path program 1 times [2023-11-29 05:34:12,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:34:12,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885394399] [2023-11-29 05:34:12,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:34:12,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:34:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:12,513 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 05:34:12,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:34:12,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885394399] [2023-11-29 05:34:12,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885394399] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:34:12,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:34:12,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:34:12,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414196822] [2023-11-29 05:34:12,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:34:12,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:34:12,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:34:12,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:34:12,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:34:12,556 INFO L87 Difference]: Start difference. First operand has 293 states, 129 states have (on average 2.4031007751937983) internal successors, (310), 278 states have internal predecessors, (310), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:13,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:34:13,001 INFO L93 Difference]: Finished difference Result 499 states and 552 transitions. [2023-11-29 05:34:13,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:34:13,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-29 05:34:13,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:34:13,016 INFO L225 Difference]: With dead ends: 499 [2023-11-29 05:34:13,016 INFO L226 Difference]: Without dead ends: 498 [2023-11-29 05:34:13,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 05:34:13,022 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 224 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:34:13,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 374 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:34:13,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2023-11-29 05:34:13,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 364. [2023-11-29 05:34:13,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 203 states have (on average 2.3201970443349755) internal successors, (471), 349 states have internal predecessors, (471), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-29 05:34:13,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 501 transitions. [2023-11-29 05:34:13,087 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 501 transitions. Word has length 2 [2023-11-29 05:34:13,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:34:13,088 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 501 transitions. [2023-11-29 05:34:13,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:13,088 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 501 transitions. [2023-11-29 05:34:13,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-29 05:34:13,088 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:34:13,089 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-29 05:34:13,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:34:13,089 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-29 05:34:13,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:34:13,090 INFO L85 PathProgramCache]: Analyzing trace with hash 18388, now seen corresponding path program 1 times [2023-11-29 05:34:13,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:34:13,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472059104] [2023-11-29 05:34:13,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:34:13,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:34:13,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:13,175 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 05:34:13,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:34:13,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472059104] [2023-11-29 05:34:13,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472059104] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:34:13,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:34:13,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:34:13,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021555052] [2023-11-29 05:34:13,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:34:13,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:34:13,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:34:13,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:34:13,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:34:13,179 INFO L87 Difference]: Start difference. First operand 364 states and 501 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:13,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:34:13,416 INFO L93 Difference]: Finished difference Result 365 states and 504 transitions. [2023-11-29 05:34:13,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:34:13,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-29 05:34:13,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:34:13,419 INFO L225 Difference]: With dead ends: 365 [2023-11-29 05:34:13,419 INFO L226 Difference]: Without dead ends: 365 [2023-11-29 05:34:13,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 05:34:13,421 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 5 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:34:13,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 471 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:34:13,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2023-11-29 05:34:13,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 362. [2023-11-29 05:34:13,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 203 states have (on average 2.310344827586207) internal successors, (469), 347 states have internal predecessors, (469), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-29 05:34:13,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 499 transitions. [2023-11-29 05:34:13,445 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 499 transitions. Word has length 2 [2023-11-29 05:34:13,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:34:13,446 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 499 transitions. [2023-11-29 05:34:13,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:13,446 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 499 transitions. [2023-11-29 05:34:13,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 05:34:13,446 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:34:13,447 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:34:13,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 05:34:13,447 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-29 05:34:13,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:34:13,448 INFO L85 PathProgramCache]: Analyzing trace with hash -702363284, now seen corresponding path program 1 times [2023-11-29 05:34:13,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:34:13,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150750932] [2023-11-29 05:34:13,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:34:13,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:34:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:13,530 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 05:34:13,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:34:13,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150750932] [2023-11-29 05:34:13,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150750932] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:34:13,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:34:13,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:34:13,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574490438] [2023-11-29 05:34:13,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:34:13,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:34:13,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:34:13,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:34:13,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:34:13,533 INFO L87 Difference]: Start difference. First operand 362 states and 499 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 05:34:13,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:34:13,762 INFO L93 Difference]: Finished difference Result 357 states and 494 transitions. [2023-11-29 05:34:13,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:34:13,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 8 [2023-11-29 05:34:13,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:34:13,766 INFO L225 Difference]: With dead ends: 357 [2023-11-29 05:34:13,766 INFO L226 Difference]: Without dead ends: 357 [2023-11-29 05:34:13,767 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 05:34:13,768 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 39 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:34:13,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 410 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:34:13,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2023-11-29 05:34:13,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 357. [2023-11-29 05:34:13,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 203 states have (on average 2.2857142857142856) internal successors, (464), 342 states have internal predecessors, (464), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-29 05:34:13,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 494 transitions. [2023-11-29 05:34:13,785 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 494 transitions. Word has length 8 [2023-11-29 05:34:13,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:34:13,785 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 494 transitions. [2023-11-29 05:34:13,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 05:34:13,786 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 494 transitions. [2023-11-29 05:34:13,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 05:34:13,786 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:34:13,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:34:13,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 05:34:13,787 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-29 05:34:13,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:34:13,787 INFO L85 PathProgramCache]: Analyzing trace with hash -702363283, now seen corresponding path program 1 times [2023-11-29 05:34:13,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:34:13,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335306811] [2023-11-29 05:34:13,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:34:13,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:34:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:13,887 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 05:34:13,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:34:13,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335306811] [2023-11-29 05:34:13,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335306811] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:34:13,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:34:13,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:34:13,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105501644] [2023-11-29 05:34:13,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:34:13,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:34:13,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:34:13,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:34:13,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:34:13,890 INFO L87 Difference]: Start difference. First operand 357 states and 494 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 05:34:14,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:34:14,103 INFO L93 Difference]: Finished difference Result 352 states and 489 transitions. [2023-11-29 05:34:14,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:34:14,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 8 [2023-11-29 05:34:14,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:34:14,105 INFO L225 Difference]: With dead ends: 352 [2023-11-29 05:34:14,105 INFO L226 Difference]: Without dead ends: 352 [2023-11-29 05:34:14,106 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 05:34:14,107 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 34 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:34:14,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 421 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:34:14,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2023-11-29 05:34:14,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2023-11-29 05:34:14,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 203 states have (on average 2.2610837438423643) internal successors, (459), 337 states have internal predecessors, (459), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-29 05:34:14,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 489 transitions. [2023-11-29 05:34:14,120 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 489 transitions. Word has length 8 [2023-11-29 05:34:14,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:34:14,120 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 489 transitions. [2023-11-29 05:34:14,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 05:34:14,121 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 489 transitions. [2023-11-29 05:34:14,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 05:34:14,121 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:34:14,121 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:34:14,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 05:34:14,122 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-29 05:34:14,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:34:14,122 INFO L85 PathProgramCache]: Analyzing trace with hash -298424900, now seen corresponding path program 1 times [2023-11-29 05:34:14,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:34:14,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100015379] [2023-11-29 05:34:14,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:34:14,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:34:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:14,272 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 05:34:14,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:34:14,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100015379] [2023-11-29 05:34:14,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100015379] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:34:14,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:34:14,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:34:14,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495865856] [2023-11-29 05:34:14,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:34:14,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:34:14,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:34:14,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:34:14,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:34:14,275 INFO L87 Difference]: Start difference. First operand 352 states and 489 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 05:34:14,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:34:14,841 INFO L93 Difference]: Finished difference Result 475 states and 526 transitions. [2023-11-29 05:34:14,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:34:14,841 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 9 [2023-11-29 05:34:14,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:34:14,844 INFO L225 Difference]: With dead ends: 475 [2023-11-29 05:34:14,844 INFO L226 Difference]: Without dead ends: 475 [2023-11-29 05:34:14,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:34:14,846 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 288 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:34:14,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 648 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 05:34:14,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2023-11-29 05:34:14,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 344. [2023-11-29 05:34:14,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 203 states have (on average 2.2216748768472905) internal successors, (451), 329 states have internal predecessors, (451), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-29 05:34:14,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 481 transitions. [2023-11-29 05:34:14,859 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 481 transitions. Word has length 9 [2023-11-29 05:34:14,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:34:14,860 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 481 transitions. [2023-11-29 05:34:14,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 05:34:14,860 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 481 transitions. [2023-11-29 05:34:14,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 05:34:14,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:34:14,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:34:14,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 05:34:14,861 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-29 05:34:14,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:34:14,862 INFO L85 PathProgramCache]: Analyzing trace with hash -298424899, now seen corresponding path program 1 times [2023-11-29 05:34:14,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:34:14,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466812327] [2023-11-29 05:34:14,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:34:14,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:34:14,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:15,052 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 05:34:15,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:34:15,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466812327] [2023-11-29 05:34:15,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466812327] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:34:15,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:34:15,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:34:15,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481670698] [2023-11-29 05:34:15,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:34:15,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:34:15,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:34:15,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:34:15,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:34:15,055 INFO L87 Difference]: Start difference. First operand 344 states and 481 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 05:34:15,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:34:15,762 INFO L93 Difference]: Finished difference Result 465 states and 516 transitions. [2023-11-29 05:34:15,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:34:15,764 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 9 [2023-11-29 05:34:15,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:34:15,766 INFO L225 Difference]: With dead ends: 465 [2023-11-29 05:34:15,767 INFO L226 Difference]: Without dead ends: 465 [2023-11-29 05:34:15,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:34:15,768 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 732 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 05:34:15,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [732 Valid, 320 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 05:34:15,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2023-11-29 05:34:15,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 335. [2023-11-29 05:34:15,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 203 states have (on average 2.1724137931034484) internal successors, (441), 320 states have internal predecessors, (441), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-29 05:34:15,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 471 transitions. [2023-11-29 05:34:15,782 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 471 transitions. Word has length 9 [2023-11-29 05:34:15,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:34:15,782 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 471 transitions. [2023-11-29 05:34:15,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 05:34:15,782 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 471 transitions. [2023-11-29 05:34:15,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 05:34:15,783 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:34:15,783 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:34:15,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 05:34:15,783 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-29 05:34:15,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:34:15,784 INFO L85 PathProgramCache]: Analyzing trace with hash 718604548, now seen corresponding path program 1 times [2023-11-29 05:34:15,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:34:15,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267658939] [2023-11-29 05:34:15,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:34:15,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:34:15,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:16,072 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 05:34:16,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:34:16,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267658939] [2023-11-29 05:34:16,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267658939] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:34:16,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:34:16,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 05:34:16,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642171187] [2023-11-29 05:34:16,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:34:16,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:34:16,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:34:16,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:34:16,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:34:16,074 INFO L87 Difference]: Start difference. First operand 335 states and 471 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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 05:34:16,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:34:16,278 INFO L93 Difference]: Finished difference Result 355 states and 494 transitions. [2023-11-29 05:34:16,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:34:16,278 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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 16 [2023-11-29 05:34:16,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:34:16,281 INFO L225 Difference]: With dead ends: 355 [2023-11-29 05:34:16,281 INFO L226 Difference]: Without dead ends: 355 [2023-11-29 05:34:16,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:34:16,282 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 29 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1271 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:34:16,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 1271 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:34:16,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2023-11-29 05:34:16,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 352. [2023-11-29 05:34:16,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 218 states have (on average 2.110091743119266) internal successors, (460), 336 states have internal predecessors, (460), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2023-11-29 05:34:16,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 493 transitions. [2023-11-29 05:34:16,297 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 493 transitions. Word has length 16 [2023-11-29 05:34:16,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:34:16,297 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 493 transitions. [2023-11-29 05:34:16,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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 05:34:16,298 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 493 transitions. [2023-11-29 05:34:16,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 05:34:16,298 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:34:16,298 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:34:16,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 05:34:16,299 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-29 05:34:16,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:34:16,299 INFO L85 PathProgramCache]: Analyzing trace with hash -517000016, now seen corresponding path program 1 times [2023-11-29 05:34:16,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:34:16,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176508344] [2023-11-29 05:34:16,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:34:16,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:34:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:16,630 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 05:34:16,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:34:16,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176508344] [2023-11-29 05:34:16,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176508344] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:34:16,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:34:16,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 05:34:16,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581183486] [2023-11-29 05:34:16,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:34:16,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:34:16,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:34:16,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:34:16,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:34:16,632 INFO L87 Difference]: Start difference. First operand 352 states and 493 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 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 05:34:16,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:34:16,914 INFO L93 Difference]: Finished difference Result 346 states and 484 transitions. [2023-11-29 05:34:16,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:34:16,914 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 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 17 [2023-11-29 05:34:16,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:34:16,917 INFO L225 Difference]: With dead ends: 346 [2023-11-29 05:34:16,917 INFO L226 Difference]: Without dead ends: 346 [2023-11-29 05:34:16,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:34:16,918 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 252 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:34:16,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 1274 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:34:16,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-11-29 05:34:16,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 344. [2023-11-29 05:34:16,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 211 states have (on average 2.132701421800948) internal successors, (450), 328 states have internal predecessors, (450), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 05:34:16,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 482 transitions. [2023-11-29 05:34:16,931 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 482 transitions. Word has length 17 [2023-11-29 05:34:16,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:34:16,931 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 482 transitions. [2023-11-29 05:34:16,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 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 05:34:16,931 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 482 transitions. [2023-11-29 05:34:16,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 05:34:16,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:34:16,932 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:34:16,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 05:34:16,933 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-29 05:34:16,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:34:16,933 INFO L85 PathProgramCache]: Analyzing trace with hash -342667833, now seen corresponding path program 1 times [2023-11-29 05:34:16,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:34:16,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074471664] [2023-11-29 05:34:16,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:34:16,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:34:16,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:17,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 05:34:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:17,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:34:17,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:34:17,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074471664] [2023-11-29 05:34:17,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074471664] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:34:17,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531814790] [2023-11-29 05:34:17,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:34:17,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:34:17,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:34:17,795 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:34:17,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:34:17,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:17,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 05:34:17,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:34:18,071 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 05:34:18,197 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 05:34:18,375 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-11-29 05:34:18,375 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 23 treesize of output 24 [2023-11-29 05:34:18,439 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 17 treesize of output 9 [2023-11-29 05:34:18,443 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 05:34:18,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:34:18,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-11-29 05:34:18,801 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:34:18,802 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 112 treesize of output 116 [2023-11-29 05:34:18,815 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 136 treesize of output 112 [2023-11-29 05:34:18,990 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 38 treesize of output 34 [2023-11-29 05:34:19,627 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 05:34:19,627 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 52 treesize of output 1 [2023-11-29 05:34:19,633 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 05:34:19,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531814790] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:34:19,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:34:19,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2023-11-29 05:34:19,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426914566] [2023-11-29 05:34:19,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:34:19,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 05:34:19,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:34:19,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 05:34:19,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2023-11-29 05:34:19,637 INFO L87 Difference]: Start difference. First operand 344 states and 482 transitions. Second operand has 26 states, 25 states have (on average 2.76) internal successors, (69), 21 states have internal predecessors, (69), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 05:34:21,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:34:21,964 INFO L93 Difference]: Finished difference Result 479 states and 531 transitions. [2023-11-29 05:34:21,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 05:34:21,965 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.76) internal successors, (69), 21 states have internal predecessors, (69), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-11-29 05:34:21,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:34:21,969 INFO L225 Difference]: With dead ends: 479 [2023-11-29 05:34:21,969 INFO L226 Difference]: Without dead ends: 479 [2023-11-29 05:34:21,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 05:34:21,970 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 578 mSDsluCounter, 1950 mSDsCounter, 0 mSdLazyCounter, 2584 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 2104 SdHoareTripleChecker+Invalid, 2658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:34:21,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [578 Valid, 2104 Invalid, 2658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2584 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 05:34:21,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2023-11-29 05:34:21,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 349. [2023-11-29 05:34:21,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 216 states have (on average 2.1018518518518516) internal successors, (454), 333 states have internal predecessors, (454), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 05:34:21,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 486 transitions. [2023-11-29 05:34:21,984 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 486 transitions. Word has length 31 [2023-11-29 05:34:21,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:34:21,985 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 486 transitions. [2023-11-29 05:34:21,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.76) internal successors, (69), 21 states have internal predecessors, (69), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 05:34:21,985 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 486 transitions. [2023-11-29 05:34:21,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 05:34:21,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:34:21,986 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:34:21,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-29 05:34:22,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:34:22,187 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-29 05:34:22,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:34:22,188 INFO L85 PathProgramCache]: Analyzing trace with hash -342667832, now seen corresponding path program 1 times [2023-11-29 05:34:22,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:34:22,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164404313] [2023-11-29 05:34:22,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:34:22,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:34:22,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:23,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 05:34:23,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:34:23,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:34:23,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164404313] [2023-11-29 05:34:23,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164404313] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:34:23,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700756733] [2023-11-29 05:34:23,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:34:23,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:34:23,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:34:23,324 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:34:23,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:34:23,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:23,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 05:34:23,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:34:23,508 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 05:34:23,616 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 05:34:23,622 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 05:34:23,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:34:23,844 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 28 treesize of output 23 [2023-11-29 05:34:23,853 INFO L349 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2023-11-29 05:34:23,854 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 17 treesize of output 17 [2023-11-29 05:34:24,050 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:34:24,051 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-11-29 05:34:24,055 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:34:24,058 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:34:24,058 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 32 treesize of output 17 [2023-11-29 05:34:24,085 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 05:34:24,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:34:24,703 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 81 treesize of output 79 [2023-11-29 05:34:24,710 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 104 treesize of output 100 [2023-11-29 05:34:24,716 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 100 treesize of output 94 [2023-11-29 05:34:24,729 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:34:24,730 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 133 treesize of output 130 [2023-11-29 05:34:24,745 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:34:24,746 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 102 treesize of output 104 [2023-11-29 05:34:24,763 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:34:24,764 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 80 treesize of output 85 [2023-11-29 05:34:25,105 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:34:25,105 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 97 treesize of output 101 [2023-11-29 05:34:25,524 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 63 treesize of output 51 [2023-11-29 05:34:25,563 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 34 treesize of output 28 [2023-11-29 05:34:25,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2023-11-29 05:34:25,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2023-11-29 05:34:25,625 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 34 treesize of output 28 [2023-11-29 05:34:25,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2023-11-29 05:34:25,651 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 36 treesize of output 30 [2023-11-29 05:34:26,644 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 05:34:26,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700756733] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:34:26,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:34:26,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 30 [2023-11-29 05:34:26,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205385186] [2023-11-29 05:34:26,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:34:26,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 05:34:26,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:34:26,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 05:34:26,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2023-11-29 05:34:26,647 INFO L87 Difference]: Start difference. First operand 349 states and 486 transitions. Second operand has 31 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 26 states have internal predecessors, (79), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 05:34:30,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:34:30,012 INFO L93 Difference]: Finished difference Result 478 states and 530 transitions. [2023-11-29 05:34:30,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:34:30,013 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 26 states have internal predecessors, (79), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-11-29 05:34:30,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:34:30,016 INFO L225 Difference]: With dead ends: 478 [2023-11-29 05:34:30,017 INFO L226 Difference]: Without dead ends: 478 [2023-11-29 05:34:30,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=225, Invalid=1257, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 05:34:30,018 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 1220 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 3774 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 1567 SdHoareTripleChecker+Invalid, 3863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 3774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:34:30,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1220 Valid, 1567 Invalid, 3863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 3774 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-29 05:34:30,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2023-11-29 05:34:30,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 348. [2023-11-29 05:34:30,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 216 states have (on average 2.0972222222222223) internal successors, (453), 332 states have internal predecessors, (453), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 05:34:30,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 485 transitions. [2023-11-29 05:34:30,034 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 485 transitions. Word has length 31 [2023-11-29 05:34:30,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:34:30,034 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 485 transitions. [2023-11-29 05:34:30,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 26 states have internal predecessors, (79), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 05:34:30,035 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 485 transitions. [2023-11-29 05:34:30,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-11-29 05:34:30,043 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:34:30,043 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:34:30,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:34:30,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 05:34:30,248 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-29 05:34:30,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:34:30,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1640282576, now seen corresponding path program 1 times [2023-11-29 05:34:30,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:34:30,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829250822] [2023-11-29 05:34:30,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:34:30,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:34:30,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:30,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 05:34:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:30,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:34:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:30,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-29 05:34:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:30,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-29 05:34:30,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:30,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-29 05:34:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:30,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-29 05:34:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:30,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2023-11-29 05:34:30,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:30,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2023-11-29 05:34:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:30,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-11-29 05:34:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:30,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2023-11-29 05:34:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:30,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2023-11-29 05:34:30,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:30,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2023-11-29 05:34:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:30,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2023-11-29 05:34:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:30,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2023-11-29 05:34:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:30,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2023-11-29 05:34:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:30,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 49 proven. 133 refuted. 0 times theorem prover too weak. 973 trivial. 0 not checked. [2023-11-29 05:34:30,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:34:30,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829250822] [2023-11-29 05:34:30,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829250822] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:34:30,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321043100] [2023-11-29 05:34:30,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:34:30,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:34:30,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:34:30,661 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:34:30,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:34:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:31,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 2099 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:34:31,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:34:31,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 215 proven. 0 refuted. 0 times theorem prover too weak. 940 trivial. 0 not checked. [2023-11-29 05:34:31,121 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:34:31,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321043100] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:34:31,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:34:31,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-11-29 05:34:31,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751756943] [2023-11-29 05:34:31,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:34:31,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:34:31,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:34:31,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:34:31,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:34:31,123 INFO L87 Difference]: Start difference. First operand 348 states and 485 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-29 05:34:31,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:34:31,180 INFO L93 Difference]: Finished difference Result 349 states and 486 transitions. [2023-11-29 05:34:31,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:34:31,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 198 [2023-11-29 05:34:31,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:34:31,185 INFO L225 Difference]: With dead ends: 349 [2023-11-29 05:34:31,185 INFO L226 Difference]: Without dead ends: 349 [2023-11-29 05:34:31,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:34:31,186 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 0 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:34:31,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 521 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:34:31,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2023-11-29 05:34:31,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2023-11-29 05:34:31,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 217 states have (on average 2.0921658986175116) internal successors, (454), 333 states have internal predecessors, (454), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 05:34:31,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 486 transitions. [2023-11-29 05:34:31,198 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 486 transitions. Word has length 198 [2023-11-29 05:34:31,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:34:31,199 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 486 transitions. [2023-11-29 05:34:31,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-29 05:34:31,199 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 486 transitions. [2023-11-29 05:34:31,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-11-29 05:34:31,202 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:34:31,203 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:34:31,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 05:34:31,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:34:31,408 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-29 05:34:31,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:34:31,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1786983992, now seen corresponding path program 1 times [2023-11-29 05:34:31,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:34:31,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642665897] [2023-11-29 05:34:31,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:34:31,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:34:31,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:32,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 05:34:32,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:32,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:34:32,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:32,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-29 05:34:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:32,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-29 05:34:32,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:32,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-29 05:34:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:32,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2023-11-29 05:34:32,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:32,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-11-29 05:34:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:32,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2023-11-29 05:34:33,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:33,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2023-11-29 05:34:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:33,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-11-29 05:34:33,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:33,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2023-11-29 05:34:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:33,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2023-11-29 05:34:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:33,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2023-11-29 05:34:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:33,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2023-11-29 05:34:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:33,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2023-11-29 05:34:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 963 trivial. 0 not checked. [2023-11-29 05:34:33,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:34:33,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642665897] [2023-11-29 05:34:33,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642665897] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:34:33,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174919723] [2023-11-29 05:34:33,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:34:33,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:34:33,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:34:33,140 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:34:33,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:34:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:33,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 2225 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 05:34:33,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:34:33,819 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 11 treesize of output 7 [2023-11-29 05:34:33,828 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-11-29 05:34:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 456 proven. 11 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2023-11-29 05:34:33,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:34:34,183 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 82 treesize of output 78 [2023-11-29 05:34:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 24 proven. 287 refuted. 0 times theorem prover too weak. 949 trivial. 0 not checked. [2023-11-29 05:34:34,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174919723] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:34:34,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:34:34,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 22 [2023-11-29 05:34:34,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114560519] [2023-11-29 05:34:34,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:34:34,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 05:34:34,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:34:34,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 05:34:34,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2023-11-29 05:34:34,299 INFO L87 Difference]: Start difference. First operand 349 states and 486 transitions. Second operand has 22 states, 21 states have (on average 4.571428571428571) internal successors, (96), 18 states have internal predecessors, (96), 5 states have call successors, (45), 5 states have call predecessors, (45), 5 states have return successors, (33), 5 states have call predecessors, (33), 5 states have call successors, (33) [2023-11-29 05:34:35,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:34:35,162 INFO L93 Difference]: Finished difference Result 360 states and 499 transitions. [2023-11-29 05:34:35,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 05:34:35,162 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.571428571428571) internal successors, (96), 18 states have internal predecessors, (96), 5 states have call successors, (45), 5 states have call predecessors, (45), 5 states have return successors, (33), 5 states have call predecessors, (33), 5 states have call successors, (33) Word has length 212 [2023-11-29 05:34:35,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:34:35,164 INFO L225 Difference]: With dead ends: 360 [2023-11-29 05:34:35,164 INFO L226 Difference]: Without dead ends: 360 [2023-11-29 05:34:35,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=232, Invalid=958, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 05:34:35,166 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 618 mSDsluCounter, 2400 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 2633 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:34:35,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 2633 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 05:34:35,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2023-11-29 05:34:35,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 343. [2023-11-29 05:34:35,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 211 states have (on average 2.1137440758293837) internal successors, (446), 327 states have internal predecessors, (446), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 05:34:35,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 478 transitions. [2023-11-29 05:34:35,177 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 478 transitions. Word has length 212 [2023-11-29 05:34:35,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:34:35,178 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 478 transitions. [2023-11-29 05:34:35,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.571428571428571) internal successors, (96), 18 states have internal predecessors, (96), 5 states have call successors, (45), 5 states have call predecessors, (45), 5 states have return successors, (33), 5 states have call predecessors, (33), 5 states have call successors, (33) [2023-11-29 05:34:35,178 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 478 transitions. [2023-11-29 05:34:35,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2023-11-29 05:34:35,180 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:34:35,181 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:34:35,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:34:35,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:34:35,384 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-29 05:34:35,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:34:35,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1766237952, now seen corresponding path program 1 times [2023-11-29 05:34:35,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:34:35,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231471636] [2023-11-29 05:34:35,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:34:35,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:34:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:49,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 05:34:49,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:49,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:34:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:50,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-29 05:34:50,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:50,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-29 05:34:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:50,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-11-29 05:34:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:50,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-11-29 05:34:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:50,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2023-11-29 05:34:50,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:51,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2023-11-29 05:34:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:51,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2023-11-29 05:34:51,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:51,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2023-11-29 05:34:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:51,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2023-11-29 05:34:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:51,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2023-11-29 05:34:51,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:51,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2023-11-29 05:34:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:51,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2023-11-29 05:34:51,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:51,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-11-29 05:34:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:52,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 504 refuted. 0 times theorem prover too weak. 777 trivial. 0 not checked. [2023-11-29 05:34:52,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:34:52,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231471636] [2023-11-29 05:34:52,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231471636] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:34:52,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74264572] [2023-11-29 05:34:52,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:34:52,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:34:52,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:34:52,119 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:34:52,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:34:52,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:52,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 2323 conjuncts, 485 conjunts are in the unsatisfiable core [2023-11-29 05:34:52,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:34:53,075 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 05:34:53,081 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 05:34:53,122 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 21 treesize of output 20 [2023-11-29 05:34:53,129 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 17 treesize of output 17 [2023-11-29 05:34:53,613 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:34:53,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2023-11-29 05:34:53,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 21 [2023-11-29 05:34:54,066 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:34:54,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2023-11-29 05:34:54,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:34:54,076 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 26 treesize of output 13 [2023-11-29 05:34:54,095 INFO L349 Elim1Store]: treesize reduction 38, result has 36.7 percent of original size [2023-11-29 05:34:54,095 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 29 treesize of output 37 [2023-11-29 05:34:54,101 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 46 treesize of output 26 [2023-11-29 05:34:54,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:34:54,697 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 26 treesize of output 13 [2023-11-29 05:34:54,704 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:34:54,725 INFO L349 Elim1Store]: treesize reduction 63, result has 35.1 percent of original size [2023-11-29 05:34:54,725 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 38 treesize of output 52 [2023-11-29 05:34:54,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 43 [2023-11-29 05:34:54,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-11-29 05:34:55,121 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:34:55,151 INFO L349 Elim1Store]: treesize reduction 89, result has 34.6 percent of original size [2023-11-29 05:34:55,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 68 [2023-11-29 05:34:55,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2023-11-29 05:34:55,181 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 95 treesize of output 51 [2023-11-29 05:34:55,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-11-29 05:34:55,697 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:34:55,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 43 [2023-11-29 05:34:55,727 INFO L349 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-11-29 05:34:55,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 36 [2023-11-29 05:34:55,731 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 18 treesize of output 13 [2023-11-29 05:34:55,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-11-29 05:34:56,137 INFO L349 Elim1Store]: treesize reduction 29, result has 42.0 percent of original size [2023-11-29 05:34:56,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 26 treesize of output 25 [2023-11-29 05:34:56,140 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 37 treesize of output 21 [2023-11-29 05:34:56,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-11-29 05:34:56,553 INFO L349 Elim1Store]: treesize reduction 29, result has 42.0 percent of original size [2023-11-29 05:34:56,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 38 treesize of output 37 [2023-11-29 05:34:56,557 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:34:56,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2023-11-29 05:34:56,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-11-29 05:34:57,021 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:34:57,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2023-11-29 05:34:57,055 INFO L349 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2023-11-29 05:34:57,055 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 3 case distinctions, treesize of input 43 treesize of output 65 [2023-11-29 05:34:57,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 41 [2023-11-29 05:34:57,374 INFO L349 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2023-11-29 05:34:57,374 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 3 case distinctions, treesize of input 43 treesize of output 65 [2023-11-29 05:34:57,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 41 [2023-11-29 05:34:57,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-11-29 05:34:58,047 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:34:58,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2023-11-29 05:34:58,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2023-11-29 05:34:58,087 INFO L349 Elim1Store]: treesize reduction 32, result has 54.9 percent of original size [2023-11-29 05:34:58,088 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 3 case distinctions, treesize of input 31 treesize of output 53 [2023-11-29 05:34:58,346 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:34:58,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2023-11-29 05:34:58,363 INFO L349 Elim1Store]: treesize reduction 29, result has 42.0 percent of original size [2023-11-29 05:34:58,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 26 treesize of output 25 [2023-11-29 05:34:58,366 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 37 treesize of output 21 [2023-11-29 05:34:58,593 INFO L349 Elim1Store]: treesize reduction 29, result has 42.0 percent of original size [2023-11-29 05:34:58,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 38 treesize of output 37 [2023-11-29 05:34:58,597 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:34:58,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2023-11-29 05:34:58,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-11-29 05:34:58,841 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:34:58,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2023-11-29 05:34:58,878 INFO L349 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2023-11-29 05:34:58,879 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 3 case distinctions, treesize of input 43 treesize of output 65 [2023-11-29 05:34:58,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 41 [2023-11-29 05:34:59,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2023-11-29 05:34:59,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2023-11-29 05:34:59,703 INFO L349 Elim1Store]: treesize reduction 32, result has 54.9 percent of original size [2023-11-29 05:34:59,703 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 3 case distinctions, treesize of input 31 treesize of output 53 [2023-11-29 05:34:59,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2023-11-29 05:34:59,877 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:34:59,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2023-11-29 05:34:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 224 proven. 832 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-11-29 05:34:59,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:35:00,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74264572] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:35:00,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:35:00,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 51] total 66 [2023-11-29 05:35:00,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102202664] [2023-11-29 05:35:00,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:35:00,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-11-29 05:35:00,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:35:00,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-11-29 05:35:00,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=4438, Unknown=1, NotChecked=0, Total=4830 [2023-11-29 05:35:00,335 INFO L87 Difference]: Start difference. First operand 343 states and 478 transitions. Second operand has 67 states, 61 states have (on average 2.9672131147540983) internal successors, (181), 58 states have internal predecessors, (181), 12 states have call successors, (30), 5 states have call predecessors, (30), 14 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) [2023-11-29 05:35:07,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:35:07,647 INFO L93 Difference]: Finished difference Result 494 states and 559 transitions. [2023-11-29 05:35:07,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 05:35:07,648 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 61 states have (on average 2.9672131147540983) internal successors, (181), 58 states have internal predecessors, (181), 12 states have call successors, (30), 5 states have call predecessors, (30), 14 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) Word has length 226 [2023-11-29 05:35:07,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:35:07,651 INFO L225 Difference]: With dead ends: 494 [2023-11-29 05:35:07,651 INFO L226 Difference]: Without dead ends: 494 [2023-11-29 05:35:07,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 228 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2719 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=786, Invalid=6869, Unknown=1, NotChecked=0, Total=7656 [2023-11-29 05:35:07,654 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 1768 mSDsluCounter, 2247 mSDsCounter, 0 mSdLazyCounter, 6555 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1768 SdHoareTripleChecker+Valid, 2355 SdHoareTripleChecker+Invalid, 6682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 6555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-11-29 05:35:07,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1768 Valid, 2355 Invalid, 6682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 6555 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-11-29 05:35:07,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2023-11-29 05:35:07,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 352. [2023-11-29 05:35:07,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 221 states have (on average 2.081447963800905) internal successors, (460), 336 states have internal predecessors, (460), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 05:35:07,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 492 transitions. [2023-11-29 05:35:07,665 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 492 transitions. Word has length 226 [2023-11-29 05:35:07,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:35:07,666 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 492 transitions. [2023-11-29 05:35:07,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 61 states have (on average 2.9672131147540983) internal successors, (181), 58 states have internal predecessors, (181), 12 states have call successors, (30), 5 states have call predecessors, (30), 14 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) [2023-11-29 05:35:07,667 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 492 transitions. [2023-11-29 05:35:07,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2023-11-29 05:35:07,669 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:35:07,670 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:35:07,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:35:07,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 05:35:07,870 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-29 05:35:07,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:35:07,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1766237953, now seen corresponding path program 1 times [2023-11-29 05:35:07,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:35:07,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469648704] [2023-11-29 05:35:07,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:35:07,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:35:08,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:35:15,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-29 05:35:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:35:15,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:35:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:35:15,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-29 05:35:15,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:35:15,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-29 05:35:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:35:16,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-11-29 05:35:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:35:16,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-11-29 05:35:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:35:16,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2023-11-29 05:35:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:35:16,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2023-11-29 05:35:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:35:16,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2023-11-29 05:35:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:35:16,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2023-11-29 05:35:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:35:16,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2023-11-29 05:35:16,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:35:16,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2023-11-29 05:35:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:35:16,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2023-11-29 05:35:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:35:16,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2023-11-29 05:35:16,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:35:16,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-11-29 05:35:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:35:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 14 proven. 70 refuted. 0 times theorem prover too weak. 1197 trivial. 0 not checked. [2023-11-29 05:35:17,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:35:17,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469648704] [2023-11-29 05:35:17,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469648704] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:35:17,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610336697] [2023-11-29 05:35:17,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:35:17,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:35:17,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:35:17,058 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:35:17,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:35:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:35:17,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 2323 conjuncts, 334 conjunts are in the unsatisfiable core [2023-11-29 05:35:17,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:35:17,883 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 05:35:17,909 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 17 treesize of output 17 [2023-11-29 05:35:18,119 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:35:18,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2023-11-29 05:35:18,330 INFO L349 Elim1Store]: treesize reduction 44, result has 33.3 percent of original size [2023-11-29 05:35:18,331 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 35 treesize of output 28 [2023-11-29 05:35:18,333 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 37 treesize of output 21 [2023-11-29 05:35:18,667 INFO L349 Elim1Store]: treesize reduction 38, result has 36.7 percent of original size [2023-11-29 05:35:18,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 37 [2023-11-29 05:35:18,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 30 [2023-11-29 05:35:18,893 INFO L349 Elim1Store]: treesize reduction 132, result has 29.8 percent of original size [2023-11-29 05:35:18,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 68 [2023-11-29 05:35:18,899 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 78 treesize of output 42 [2023-11-29 05:35:19,235 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:35:19,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 33 [2023-11-29 05:35:19,266 INFO L349 Elim1Store]: treesize reduction 74, result has 32.7 percent of original size [2023-11-29 05:35:19,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 31 treesize of output 53 [2023-11-29 05:35:19,616 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 25 [2023-11-29 05:35:19,661 INFO L349 Elim1Store]: treesize reduction 100, result has 31.0 percent of original size [2023-11-29 05:35:19,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 38 treesize of output 60 [2023-11-29 05:35:19,965 INFO L349 Elim1Store]: treesize reduction 148, result has 29.2 percent of original size [2023-11-29 05:35:19,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 50 treesize of output 76 [2023-11-29 05:35:19,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 33 [2023-11-29 05:35:20,328 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:35:20,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 41 [2023-11-29 05:35:20,385 INFO L349 Elim1Store]: treesize reduction 92, result has 32.8 percent of original size [2023-11-29 05:35:20,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 36 treesize of output 65 [2023-11-29 05:35:20,703 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 57 treesize of output 29 [2023-11-29 05:35:20,761 INFO L349 Elim1Store]: treesize reduction 110, result has 32.9 percent of original size [2023-11-29 05:35:20,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 41 treesize of output 77 [2023-11-29 05:35:21,264 INFO L349 Elim1Store]: treesize reduction 176, result has 33.1 percent of original size [2023-11-29 05:35:21,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 54 treesize of output 117 [2023-11-29 05:35:21,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 41 [2023-11-29 05:35:21,971 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:35:21,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 67 [2023-11-29 05:35:21,987 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:35:22,040 INFO L349 Elim1Store]: treesize reduction 113, result has 23.6 percent of original size [2023-11-29 05:35:22,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 46 treesize of output 61 [2023-11-29 05:35:23,058 INFO L349 Elim1Store]: treesize reduction 236, result has 32.4 percent of original size [2023-11-29 05:35:23,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 61 treesize of output 137 [2023-11-29 05:35:23,079 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 85 treesize of output 45 [2023-11-29 05:36:55,898 WARN L293 SmtUtils]: Spent 1.48m on a formula simplification. DAG size of input: 3660 DAG size of output: 3536 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-11-29 05:36:55,900 INFO L349 Elim1Store]: treesize reduction 828, result has 89.8 percent of original size [2023-11-29 05:36:55,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 41 select indices, 41 select index equivalence classes, 0 disjoint index pairs (out of 820 index pairs), introduced 41 new quantified variables, introduced 861 case distinctions, treesize of input 1201 treesize of output 8360 [2023-11-29 05:36:57,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1624 treesize of output 1100 [2023-11-29 05:43:59,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 101 [2023-11-29 05:43:59,576 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-11-29 05:43:59,577 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2023-11-29 05:43:59,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 05:43:59,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 05:43:59,778 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:268) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:410) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:394) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:500) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:252) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:324) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:731) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:338) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:338) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:298) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:184) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:110) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 77 more [2023-11-29 05:43:59,781 INFO L158 Benchmark]: Toolchain (without parser) took 589001.16ms. Allocated memory was 146.8MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 104.9MB in the beginning and 649.4MB in the end (delta: -544.5MB). Peak memory consumption was 802.9MB. Max. memory is 16.1GB. [2023-11-29 05:43:59,781 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 146.8MB. Free memory was 113.6MB in the beginning and 113.6MB in the end (delta: 25.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 05:43:59,781 INFO L158 Benchmark]: CACSL2BoogieTranslator took 387.35ms. Allocated memory is still 146.8MB. Free memory was 104.4MB in the beginning and 85.6MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-11-29 05:43:59,781 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.99ms. Allocated memory is still 146.8MB. Free memory was 85.6MB in the beginning and 82.4MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-29 05:43:59,782 INFO L158 Benchmark]: Boogie Preprocessor took 86.17ms. Allocated memory is still 146.8MB. Free memory was 82.4MB in the beginning and 77.2MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-29 05:43:59,782 INFO L158 Benchmark]: RCFGBuilder took 906.70ms. Allocated memory was 146.8MB in the beginning and 188.7MB in the end (delta: 41.9MB). Free memory was 77.2MB in the beginning and 133.6MB in the end (delta: -56.4MB). Peak memory consumption was 44.7MB. Max. memory is 16.1GB. [2023-11-29 05:43:59,782 INFO L158 Benchmark]: TraceAbstraction took 587556.12ms. Allocated memory was 188.7MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 133.6MB in the beginning and 649.4MB in the end (delta: -515.9MB). Peak memory consumption was 787.5MB. Max. memory is 16.1GB. [2023-11-29 05:43:59,784 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 146.8MB. Free memory was 113.6MB in the beginning and 113.6MB in the end (delta: 25.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 387.35ms. Allocated memory is still 146.8MB. Free memory was 104.4MB in the beginning and 85.6MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.99ms. Allocated memory is still 146.8MB. Free memory was 85.6MB in the beginning and 82.4MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 86.17ms. Allocated memory is still 146.8MB. Free memory was 82.4MB in the beginning and 77.2MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 906.70ms. Allocated memory was 146.8MB in the beginning and 188.7MB in the end (delta: 41.9MB). Free memory was 77.2MB in the beginning and 133.6MB in the end (delta: -56.4MB). Peak memory consumption was 44.7MB. Max. memory is 16.1GB. * TraceAbstraction took 587556.12ms. Allocated memory was 188.7MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 133.6MB in the beginning and 649.4MB in the end (delta: -515.9MB). Peak memory consumption was 787.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/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_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/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 32bit --witnessprinter.graph.data.programhash db322df1d89bf1549765f136e3e3b8000484c0c3108c31998992cf725d6dcc20 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:44:01,520 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:44:01,600 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-29 05:44:01,606 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:44:01,607 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:44:01,636 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:44:01,637 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:44:01,638 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:44:01,638 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:44:01,639 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:44:01,640 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:44:01,640 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:44:01,641 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:44:01,641 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:44:01,642 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:44:01,643 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:44:01,643 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:44:01,644 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:44:01,644 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:44:01,645 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:44:01,645 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 05:44:01,646 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 05:44:01,646 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 05:44:01,647 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:44:01,647 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 05:44:01,648 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-29 05:44:01,648 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-29 05:44:01,649 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 05:44:01,650 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:44:01,650 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:44:01,650 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:44:01,651 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:44:01,651 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:44:01,651 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:44:01,652 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:44:01,652 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:44:01,652 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:44:01,652 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-29 05:44:01,653 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-29 05:44:01,653 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:44:01,653 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:44:01,653 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:44:01,653 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:44:01,653 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-29 05:44:01,654 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_6841a496-e68c-4076-b4fb-edd70864f7fd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db322df1d89bf1549765f136e3e3b8000484c0c3108c31998992cf725d6dcc20 [2023-11-29 05:44:01,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:44:01,971 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:44:01,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:44:01,975 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:44:01,976 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:44:01,977 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i [2023-11-29 05:44:04,825 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:44:05,079 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:44:05,080 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i [2023-11-29 05:44:05,095 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/data/26357fcbe/3875f21cb293422383e2bac0aedd961a/FLAG01c23c202 [2023-11-29 05:44:05,109 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/data/26357fcbe/3875f21cb293422383e2bac0aedd961a [2023-11-29 05:44:05,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:44:05,114 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:44:05,115 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:44:05,115 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:44:05,120 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:44:05,121 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:44:05" (1/1) ... [2023-11-29 05:44:05,122 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a957c05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:05, skipping insertion in model container [2023-11-29 05:44:05,122 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:44:05" (1/1) ... [2023-11-29 05:44:05,169 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:44:05,468 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:44:05,491 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:44:05,572 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:44:05,606 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:44:05,606 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:05 WrapperNode [2023-11-29 05:44:05,607 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:44:05,608 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:44:05,608 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:44:05,608 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:44:05,616 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:05" (1/1) ... [2023-11-29 05:44:05,636 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:05" (1/1) ... [2023-11-29 05:44:05,668 INFO L138 Inliner]: procedures = 126, calls = 95, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 303 [2023-11-29 05:44:05,669 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:44:05,669 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:44:05,670 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:44:05,670 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:44:05,682 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:05" (1/1) ... [2023-11-29 05:44:05,682 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:05" (1/1) ... [2023-11-29 05:44:05,688 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:05" (1/1) ... [2023-11-29 05:44:05,719 INFO L175 MemorySlicer]: Split 66 memory accesses to 3 slices as follows [2, 54, 10]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 11 writes are split as follows [0, 6, 5]. [2023-11-29 05:44:05,719 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:05" (1/1) ... [2023-11-29 05:44:05,719 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:05" (1/1) ... [2023-11-29 05:44:05,742 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:05" (1/1) ... [2023-11-29 05:44:05,747 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:05" (1/1) ... [2023-11-29 05:44:05,751 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:05" (1/1) ... [2023-11-29 05:44:05,754 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:05" (1/1) ... [2023-11-29 05:44:05,760 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:44:05,761 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:44:05,761 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:44:05,762 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:44:05,762 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:05" (1/1) ... [2023-11-29 05:44:05,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:44:05,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:44:05,794 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:44:05,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:44:05,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2023-11-29 05:44:05,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2023-11-29 05:44:05,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#2 [2023-11-29 05:44:05,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 05:44:05,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:44:05,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-29 05:44:05,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-29 05:44:05,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-29 05:44:05,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-29 05:44:05,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-29 05:44:05,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-29 05:44:05,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#0 [2023-11-29 05:44:05,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#1 [2023-11-29 05:44:05,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#2 [2023-11-29 05:44:05,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:44:05,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-29 05:44:05,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-29 05:44:05,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-29 05:44:05,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:44:05,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:44:05,833 INFO L130 BoogieDeclarations]: Found specification of procedure append [2023-11-29 05:44:05,833 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2023-11-29 05:44:05,982 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:44:05,984 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:44:07,078 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:44:07,130 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:44:07,130 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-29 05:44:07,131 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:44:07 BoogieIcfgContainer [2023-11-29 05:44:07,131 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:44:07,133 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:44:07,134 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:44:07,136 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:44:07,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:44:05" (1/3) ... [2023-11-29 05:44:07,137 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b5812e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:44:07, skipping insertion in model container [2023-11-29 05:44:07,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:44:05" (2/3) ... [2023-11-29 05:44:07,138 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b5812e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:44:07, skipping insertion in model container [2023-11-29 05:44:07,138 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:44:07" (3/3) ... [2023-11-29 05:44:07,139 INFO L112 eAbstractionObserver]: Analyzing ICFG split_list_test05-2.i [2023-11-29 05:44:07,155 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:44:07,156 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 147 error locations. [2023-11-29 05:44:07,202 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:44:07,208 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;@f56f2e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:44:07,208 INFO L358 AbstractCegarLoop]: Starting to check reachability of 147 error locations. [2023-11-29 05:44:07,213 INFO L276 IsEmpty]: Start isEmpty. Operand has 293 states, 129 states have (on average 2.4031007751937983) internal successors, (310), 278 states have internal predecessors, (310), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-29 05:44:07,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-29 05:44:07,218 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:44:07,218 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-29 05:44:07,219 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-29 05:44:07,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:07,224 INFO L85 PathProgramCache]: Analyzing trace with hash 18387, now seen corresponding path program 1 times [2023-11-29 05:44:07,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:44:07,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40661864] [2023-11-29 05:44:07,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:07,244 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:44:07,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:44:07,246 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:44:07,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-29 05:44:07,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:07,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 05:44:07,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:44:07,378 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 7 [2023-11-29 05:44:07,389 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 05:44:07,389 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:44:07,390 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:44:07,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40661864] [2023-11-29 05:44:07,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40661864] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:44:07,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:44:07,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:44:07,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975852550] [2023-11-29 05:44:07,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:44:07,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:44:07,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:44:07,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:44:07,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:44:07,423 INFO L87 Difference]: Start difference. First operand has 293 states, 129 states have (on average 2.4031007751937983) internal successors, (310), 278 states have internal predecessors, (310), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:08,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:44:08,274 INFO L93 Difference]: Finished difference Result 499 states and 552 transitions. [2023-11-29 05:44:08,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:44:08,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-29 05:44:08,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:44:08,290 INFO L225 Difference]: With dead ends: 499 [2023-11-29 05:44:08,290 INFO L226 Difference]: Without dead ends: 498 [2023-11-29 05:44:08,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 05:44:08,295 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 224 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 05:44:08,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 374 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 05:44:08,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2023-11-29 05:44:08,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 364. [2023-11-29 05:44:08,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 203 states have (on average 2.3201970443349755) internal successors, (471), 349 states have internal predecessors, (471), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-29 05:44:08,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 501 transitions. [2023-11-29 05:44:08,360 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 501 transitions. Word has length 2 [2023-11-29 05:44:08,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:44:08,361 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 501 transitions. [2023-11-29 05:44:08,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:08,361 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 501 transitions. [2023-11-29 05:44:08,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-29 05:44:08,362 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:44:08,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-29 05:44:08,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:44:08,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:44:08,564 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-29 05:44:08,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:08,564 INFO L85 PathProgramCache]: Analyzing trace with hash 18388, now seen corresponding path program 1 times [2023-11-29 05:44:08,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:44:08,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297415386] [2023-11-29 05:44:08,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:08,565 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:44:08,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:44:08,566 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:44:08,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-29 05:44:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:08,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:44:08,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:44:08,632 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 05:44:08,642 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 05:44:08,642 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:44:08,642 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:44:08,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297415386] [2023-11-29 05:44:08,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297415386] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:44:08,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:44:08,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:44:08,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611979689] [2023-11-29 05:44:08,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:44:08,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:44:08,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:44:08,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:44:08,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:44:08,645 INFO L87 Difference]: Start difference. First operand 364 states and 501 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:09,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:44:09,186 INFO L93 Difference]: Finished difference Result 365 states and 504 transitions. [2023-11-29 05:44:09,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:44:09,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-29 05:44:09,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:44:09,189 INFO L225 Difference]: With dead ends: 365 [2023-11-29 05:44:09,190 INFO L226 Difference]: Without dead ends: 365 [2023-11-29 05:44:09,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 05:44:09,191 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 5 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:44:09,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 471 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 05:44:09,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2023-11-29 05:44:09,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 362. [2023-11-29 05:44:09,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 203 states have (on average 2.310344827586207) internal successors, (469), 347 states have internal predecessors, (469), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-29 05:44:09,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 499 transitions. [2023-11-29 05:44:09,216 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 499 transitions. Word has length 2 [2023-11-29 05:44:09,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:44:09,216 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 499 transitions. [2023-11-29 05:44:09,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:09,217 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 499 transitions. [2023-11-29 05:44:09,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 05:44:09,217 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:44:09,217 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:44:09,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-11-29 05:44:09,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:44:09,418 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-29 05:44:09,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:09,419 INFO L85 PathProgramCache]: Analyzing trace with hash -702363284, now seen corresponding path program 1 times [2023-11-29 05:44:09,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:44:09,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1965273648] [2023-11-29 05:44:09,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:09,420 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:44:09,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:44:09,427 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:44:09,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-29 05:44:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:09,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 05:44:09,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:44:09,511 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 7 [2023-11-29 05:44:09,518 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 05:44:09,518 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:44:09,518 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:44:09,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1965273648] [2023-11-29 05:44:09,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1965273648] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:44:09,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:44:09,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:44:09,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404959198] [2023-11-29 05:44:09,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:44:09,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:44:09,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:44:09,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:44:09,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:44:09,521 INFO L87 Difference]: Start difference. First operand 362 states and 499 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 05:44:09,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:44:09,965 INFO L93 Difference]: Finished difference Result 357 states and 494 transitions. [2023-11-29 05:44:09,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:44:09,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 8 [2023-11-29 05:44:09,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:44:09,968 INFO L225 Difference]: With dead ends: 357 [2023-11-29 05:44:09,968 INFO L226 Difference]: Without dead ends: 357 [2023-11-29 05:44:09,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 05:44:09,970 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 39 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:44:09,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 410 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:44:09,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2023-11-29 05:44:09,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 357. [2023-11-29 05:44:09,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 203 states have (on average 2.2857142857142856) internal successors, (464), 342 states have internal predecessors, (464), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-29 05:44:09,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 494 transitions. [2023-11-29 05:44:09,986 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 494 transitions. Word has length 8 [2023-11-29 05:44:09,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:44:09,986 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 494 transitions. [2023-11-29 05:44:09,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 05:44:09,987 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 494 transitions. [2023-11-29 05:44:09,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 05:44:09,987 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:44:09,987 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:44:09,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-11-29 05:44:10,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:44:10,188 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-29 05:44:10,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:10,189 INFO L85 PathProgramCache]: Analyzing trace with hash -702363283, now seen corresponding path program 1 times [2023-11-29 05:44:10,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:44:10,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380672938] [2023-11-29 05:44:10,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:10,189 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:44:10,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:44:10,190 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:44:10,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-29 05:44:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:10,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:44:10,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:44:10,284 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 05:44:10,295 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 05:44:10,295 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:44:10,295 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:44:10,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380672938] [2023-11-29 05:44:10,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1380672938] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:44:10,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:44:10,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:44:10,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624539565] [2023-11-29 05:44:10,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:44:10,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:44:10,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:44:10,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:44:10,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:44:10,297 INFO L87 Difference]: Start difference. First operand 357 states and 494 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 05:44:10,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:44:10,866 INFO L93 Difference]: Finished difference Result 352 states and 489 transitions. [2023-11-29 05:44:10,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:44:10,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 8 [2023-11-29 05:44:10,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:44:10,869 INFO L225 Difference]: With dead ends: 352 [2023-11-29 05:44:10,869 INFO L226 Difference]: Without dead ends: 352 [2023-11-29 05:44:10,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 05:44:10,870 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 34 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:44:10,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 421 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 05:44:10,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2023-11-29 05:44:10,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2023-11-29 05:44:10,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 203 states have (on average 2.2610837438423643) internal successors, (459), 337 states have internal predecessors, (459), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-29 05:44:10,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 489 transitions. [2023-11-29 05:44:10,881 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 489 transitions. Word has length 8 [2023-11-29 05:44:10,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:44:10,881 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 489 transitions. [2023-11-29 05:44:10,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 05:44:10,882 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 489 transitions. [2023-11-29 05:44:10,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 05:44:10,882 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:44:10,882 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:44:10,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-29 05:44:11,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:44:11,083 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-29 05:44:11,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:11,084 INFO L85 PathProgramCache]: Analyzing trace with hash -298424900, now seen corresponding path program 1 times [2023-11-29 05:44:11,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:44:11,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021379863] [2023-11-29 05:44:11,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:11,084 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:44:11,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:44:11,085 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:44:11,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-29 05:44:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:11,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:44:11,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:44:11,184 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 7 [2023-11-29 05:44:11,236 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:44:11,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 14 treesize of output 20 [2023-11-29 05:44:11,274 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 05:44:11,274 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:44:11,274 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:44:11,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021379863] [2023-11-29 05:44:11,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2021379863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:44:11,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:44:11,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:44:11,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867910884] [2023-11-29 05:44:11,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:44:11,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:44:11,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:44:11,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:44:11,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:44:11,277 INFO L87 Difference]: Start difference. First operand 352 states and 489 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 05:44:12,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:44:12,506 INFO L93 Difference]: Finished difference Result 475 states and 526 transitions. [2023-11-29 05:44:12,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:44:12,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 9 [2023-11-29 05:44:12,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:44:12,509 INFO L225 Difference]: With dead ends: 475 [2023-11-29 05:44:12,509 INFO L226 Difference]: Without dead ends: 475 [2023-11-29 05:44:12,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:44:12,510 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 288 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:44:12,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 521 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 05:44:12,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2023-11-29 05:44:12,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 344. [2023-11-29 05:44:12,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 203 states have (on average 2.2216748768472905) internal successors, (451), 329 states have internal predecessors, (451), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-29 05:44:12,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 481 transitions. [2023-11-29 05:44:12,523 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 481 transitions. Word has length 9 [2023-11-29 05:44:12,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:44:12,523 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 481 transitions. [2023-11-29 05:44:12,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 05:44:12,524 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 481 transitions. [2023-11-29 05:44:12,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 05:44:12,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:44:12,524 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:44:12,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-11-29 05:44:12,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:44:12,727 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-29 05:44:12,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:12,727 INFO L85 PathProgramCache]: Analyzing trace with hash -298424899, now seen corresponding path program 1 times [2023-11-29 05:44:12,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:44:12,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735414005] [2023-11-29 05:44:12,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:12,728 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:44:12,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:44:12,729 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:44:12,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-29 05:44:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:12,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 05:44:12,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:44:12,820 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 05:44:12,826 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 7 [2023-11-29 05:44:12,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:12,957 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 14 treesize of output 9 [2023-11-29 05:44:12,969 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 05:44:12,970 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 13 treesize of output 13 [2023-11-29 05:44:12,993 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 05:44:12,993 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:44:12,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:44:12,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735414005] [2023-11-29 05:44:12,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735414005] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:44:12,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:44:12,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:44:12,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649116789] [2023-11-29 05:44:12,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:44:12,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:44:12,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:44:12,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:44:12,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:44:12,996 INFO L87 Difference]: Start difference. First operand 344 states and 481 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 05:44:14,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:44:14,652 INFO L93 Difference]: Finished difference Result 466 states and 517 transitions. [2023-11-29 05:44:14,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:44:14,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 9 [2023-11-29 05:44:14,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:44:14,655 INFO L225 Difference]: With dead ends: 466 [2023-11-29 05:44:14,655 INFO L226 Difference]: Without dead ends: 466 [2023-11-29 05:44:14,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:44:14,656 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 272 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:44:14,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 325 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 05:44:14,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2023-11-29 05:44:14,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 336. [2023-11-29 05:44:14,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 203 states have (on average 2.1773399014778323) internal successors, (442), 321 states have internal predecessors, (442), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-29 05:44:14,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 472 transitions. [2023-11-29 05:44:14,668 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 472 transitions. Word has length 9 [2023-11-29 05:44:14,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:44:14,668 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 472 transitions. [2023-11-29 05:44:14,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 05:44:14,669 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 472 transitions. [2023-11-29 05:44:14,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 05:44:14,669 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:44:14,669 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:44:14,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-11-29 05:44:14,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:44:14,870 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-29 05:44:14,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:14,870 INFO L85 PathProgramCache]: Analyzing trace with hash 718604548, now seen corresponding path program 1 times [2023-11-29 05:44:14,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:44:14,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845915596] [2023-11-29 05:44:14,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:14,871 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:44:14,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:44:14,872 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:44:14,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-29 05:44:14,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:14,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 05:44:15,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:44:15,008 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 05:44:15,013 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 05:44:15,034 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-29 05:44:15,047 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 21 treesize of output 20 [2023-11-29 05:44:15,255 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 05:44:15,255 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:44:15,255 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:44:15,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845915596] [2023-11-29 05:44:15,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845915596] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:44:15,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:44:15,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:44:15,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633353967] [2023-11-29 05:44:15,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:44:15,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:44:15,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:44:15,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:44:15,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:44:15,257 INFO L87 Difference]: Start difference. First operand 336 states and 472 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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 05:44:15,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:44:15,945 INFO L93 Difference]: Finished difference Result 346 states and 484 transitions. [2023-11-29 05:44:15,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:44:15,946 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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 16 [2023-11-29 05:44:15,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:44:15,948 INFO L225 Difference]: With dead ends: 346 [2023-11-29 05:44:15,949 INFO L226 Difference]: Without dead ends: 346 [2023-11-29 05:44:15,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:44:15,950 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 13 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1273 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:44:15,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1273 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 05:44:15,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-11-29 05:44:15,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 345. [2023-11-29 05:44:15,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 211 states have (on average 2.137440758293839) internal successors, (451), 329 states have internal predecessors, (451), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 05:44:15,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 483 transitions. [2023-11-29 05:44:15,963 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 483 transitions. Word has length 16 [2023-11-29 05:44:15,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:44:15,963 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 483 transitions. [2023-11-29 05:44:15,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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 05:44:15,964 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 483 transitions. [2023-11-29 05:44:15,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 05:44:15,965 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:44:15,965 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:44:15,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-11-29 05:44:16,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:44:16,170 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-29 05:44:16,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:16,171 INFO L85 PathProgramCache]: Analyzing trace with hash -342667833, now seen corresponding path program 1 times [2023-11-29 05:44:16,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:44:16,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [457518649] [2023-11-29 05:44:16,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:16,172 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:44:16,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:44:16,172 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:44:16,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-29 05:44:16,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:16,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 05:44:16,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:44:16,382 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 7 [2023-11-29 05:44:16,473 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 05:44:16,554 INFO L349 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2023-11-29 05:44:16,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 20 treesize of output 26 [2023-11-29 05:44:16,677 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 23 treesize of output 11 [2023-11-29 05:44:16,703 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 05:44:16,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:44:16,940 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 38 treesize of output 32 [2023-11-29 05:44:17,169 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 05:44:17,170 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:44:17,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [457518649] [2023-11-29 05:44:17,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [457518649] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:44:17,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:44:17,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-29 05:44:17,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835317962] [2023-11-29 05:44:17,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:44:17,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:44:17,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:44:17,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:44:17,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:44:17,172 INFO L87 Difference]: Start difference. First operand 345 states and 483 transitions. Second operand has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 2 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 05:44:19,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:44:19,498 INFO L93 Difference]: Finished difference Result 476 states and 529 transitions. [2023-11-29 05:44:19,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:44:19,499 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 2 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 31 [2023-11-29 05:44:19,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:44:19,501 INFO L225 Difference]: With dead ends: 476 [2023-11-29 05:44:19,501 INFO L226 Difference]: Without dead ends: 476 [2023-11-29 05:44:19,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:44:19,502 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 269 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:44:19,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 934 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-29 05:44:19,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2023-11-29 05:44:19,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 344. [2023-11-29 05:44:19,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 211 states have (on average 2.132701421800948) internal successors, (450), 328 states have internal predecessors, (450), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 05:44:19,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 482 transitions. [2023-11-29 05:44:19,514 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 482 transitions. Word has length 31 [2023-11-29 05:44:19,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:44:19,514 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 482 transitions. [2023-11-29 05:44:19,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 2 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 05:44:19,515 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 482 transitions. [2023-11-29 05:44:19,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 05:44:19,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:44:19,516 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:44:19,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-11-29 05:44:19,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:44:19,717 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-29 05:44:19,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:19,717 INFO L85 PathProgramCache]: Analyzing trace with hash -342667832, now seen corresponding path program 1 times [2023-11-29 05:44:19,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:44:19,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036138172] [2023-11-29 05:44:19,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:19,718 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:44:19,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:44:19,719 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:44:19,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-29 05:44:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:19,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 05:44:19,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:44:19,988 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 05:44:20,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 05:44:20,105 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 05:44:20,208 INFO L349 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2023-11-29 05:44:20,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 18 treesize of output 20 [2023-11-29 05:44:20,339 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 21 treesize of output 9 [2023-11-29 05:44:20,373 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 05:44:20,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:44:21,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2023-11-29 05:44:21,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:21,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:21,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:21,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:44:21,357 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 05:44:21,358 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:44:21,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036138172] [2023-11-29 05:44:21,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036138172] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:44:21,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:44:21,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-11-29 05:44:21,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594684473] [2023-11-29 05:44:21,358 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:44:21,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:44:21,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:44:21,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:44:21,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:44:21,360 INFO L87 Difference]: Start difference. First operand 344 states and 482 transitions. Second operand has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 12 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 05:44:26,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:44:26,340 INFO L93 Difference]: Finished difference Result 345 states and 483 transitions. [2023-11-29 05:44:26,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:44:26,341 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 12 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2023-11-29 05:44:26,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:44:26,343 INFO L225 Difference]: With dead ends: 345 [2023-11-29 05:44:26,343 INFO L226 Difference]: Without dead ends: 345 [2023-11-29 05:44:26,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:44:26,344 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 286 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-11-29 05:44:26,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 1022 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-11-29 05:44:26,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2023-11-29 05:44:26,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 343. [2023-11-29 05:44:26,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 211 states have (on average 2.1279620853080567) internal successors, (449), 327 states have internal predecessors, (449), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 05:44:26,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 481 transitions. [2023-11-29 05:44:26,361 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 481 transitions. Word has length 31 [2023-11-29 05:44:26,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:44:26,361 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 481 transitions. [2023-11-29 05:44:26,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 12 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 05:44:26,361 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 481 transitions. [2023-11-29 05:44:26,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-11-29 05:44:26,369 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:44:26,369 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:44:26,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-11-29 05:44:26,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:44:26,572 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-29 05:44:26,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:26,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1640282576, now seen corresponding path program 1 times [2023-11-29 05:44:26,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:44:26,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752083716] [2023-11-29 05:44:26,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:26,574 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:44:26,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:44:26,575 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:44:26,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-29 05:44:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:27,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 1665 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:44:27,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:44:27,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 215 proven. 0 refuted. 0 times theorem prover too weak. 940 trivial. 0 not checked. [2023-11-29 05:44:27,239 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:44:27,239 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:44:27,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752083716] [2023-11-29 05:44:27,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752083716] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:44:27,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:44:27,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:44:27,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104341984] [2023-11-29 05:44:27,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:44:27,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:44:27,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:44:27,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:44:27,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:44:27,241 INFO L87 Difference]: Start difference. First operand 343 states and 481 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-29 05:44:27,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:44:27,383 INFO L93 Difference]: Finished difference Result 344 states and 482 transitions. [2023-11-29 05:44:27,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:44:27,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 198 [2023-11-29 05:44:27,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:44:27,387 INFO L225 Difference]: With dead ends: 344 [2023-11-29 05:44:27,387 INFO L226 Difference]: Without dead ends: 344 [2023-11-29 05:44:27,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 196 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 05:44:27,388 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 0 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:44:27,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 523 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:44:27,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2023-11-29 05:44:27,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2023-11-29 05:44:27,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 212 states have (on average 2.1226415094339623) internal successors, (450), 328 states have internal predecessors, (450), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 05:44:27,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 482 transitions. [2023-11-29 05:44:27,396 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 482 transitions. Word has length 198 [2023-11-29 05:44:27,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:44:27,397 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 482 transitions. [2023-11-29 05:44:27,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-29 05:44:27,397 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 482 transitions. [2023-11-29 05:44:27,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-11-29 05:44:27,401 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:44:27,401 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:44:27,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-11-29 05:44:27,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:44:27,603 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-29 05:44:27,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:27,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1786983992, now seen corresponding path program 1 times [2023-11-29 05:44:27,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:44:27,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1568757933] [2023-11-29 05:44:27,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:27,605 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:44:27,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:44:27,606 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:44:27,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-29 05:44:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:28,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 1763 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 05:44:28,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:44:28,337 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 05:44:28,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 313 proven. 11 refuted. 0 times theorem prover too weak. 936 trivial. 0 not checked. [2023-11-29 05:44:28,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:44:28,879 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 32 treesize of output 26 [2023-11-29 05:44:28,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 1 proven. 310 refuted. 0 times theorem prover too weak. 949 trivial. 0 not checked. [2023-11-29 05:44:28,951 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:44:28,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1568757933] [2023-11-29 05:44:28,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1568757933] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:44:28,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:44:28,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2023-11-29 05:44:28,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194069895] [2023-11-29 05:44:28,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:44:28,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:44:28,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:44:28,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:44:28,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:44:28,955 INFO L87 Difference]: Start difference. First operand 344 states and 482 transitions. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 9 states have internal predecessors, (66), 3 states have call successors, (29), 4 states have call predecessors, (29), 4 states have return successors, (28), 2 states have call predecessors, (28), 3 states have call successors, (28) [2023-11-29 05:44:30,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:44:30,176 INFO L93 Difference]: Finished difference Result 346 states and 482 transitions. [2023-11-29 05:44:30,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:44:30,177 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 9 states have internal predecessors, (66), 3 states have call successors, (29), 4 states have call predecessors, (29), 4 states have return successors, (28), 2 states have call predecessors, (28), 3 states have call successors, (28) Word has length 212 [2023-11-29 05:44:30,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:44:30,179 INFO L225 Difference]: With dead ends: 346 [2023-11-29 05:44:30,179 INFO L226 Difference]: Without dead ends: 346 [2023-11-29 05:44:30,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:44:30,179 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 294 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:44:30,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 1327 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 05:44:30,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-11-29 05:44:30,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 345. [2023-11-29 05:44:30,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 212 states have (on average 2.1179245283018866) internal successors, (449), 329 states have internal predecessors, (449), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-29 05:44:30,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 481 transitions. [2023-11-29 05:44:30,192 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 481 transitions. Word has length 212 [2023-11-29 05:44:30,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:44:30,192 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 481 transitions. [2023-11-29 05:44:30,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 9 states have internal predecessors, (66), 3 states have call successors, (29), 4 states have call predecessors, (29), 4 states have return successors, (28), 2 states have call predecessors, (28), 3 states have call successors, (28) [2023-11-29 05:44:30,193 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 481 transitions. [2023-11-29 05:44:30,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2023-11-29 05:44:30,196 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:44:30,196 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:44:30,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-11-29 05:44:30,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:44:30,397 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-29 05:44:30,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:30,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1766237952, now seen corresponding path program 1 times [2023-11-29 05:44:30,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:44:30,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329226419] [2023-11-29 05:44:30,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:30,398 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:44:30,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:44:30,399 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:44:30,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-29 05:47:01,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:02,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 1833 conjuncts, 328 conjunts are in the unsatisfiable core [2023-11-29 05:47:02,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:47:02,916 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 7 [2023-11-29 05:47:02,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 05:47:03,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 05:47:03,053 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 05:47:03,107 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2023-11-29 05:47:03,122 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 21 treesize of output 20 [2023-11-29 05:47:04,015 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:47:04,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2023-11-29 05:47:04,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:47:04,028 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 26 treesize of output 13 [2023-11-29 05:47:04,053 INFO L349 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2023-11-29 05:47:04,054 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 37 treesize of output 21 [2023-11-29 05:47:04,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 31 [2023-11-29 05:47:04,845 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 23 treesize of output 11 [2023-11-29 05:47:04,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:47:04,860 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 26 treesize of output 13 [2023-11-29 05:47:04,905 INFO L349 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2023-11-29 05:47:04,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 43 [2023-11-29 05:47:04,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 39 [2023-11-29 05:47:05,468 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 23 treesize of output 11 [2023-11-29 05:47:05,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:47:05,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2023-11-29 05:47:05,585 INFO L349 Elim1Store]: treesize reduction 157, result has 24.5 percent of original size [2023-11-29 05:47:05,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 69 [2023-11-29 05:47:05,595 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 91 treesize of output 51 [2023-11-29 05:47:06,309 INFO L349 Elim1Store]: treesize reduction 112, result has 32.5 percent of original size [2023-11-29 05:47:06,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 45 treesize of output 83 [2023-11-29 05:47:06,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2023-11-29 05:47:06,332 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 103 treesize of output 55 [2023-11-29 05:47:06,416 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 23 treesize of output 11 [2023-11-29 05:47:07,309 INFO L349 Elim1Store]: treesize reduction 239, result has 25.3 percent of original size [2023-11-29 05:47:07,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 69 treesize of output 109 [2023-11-29 05:47:07,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2023-11-29 05:47:07,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 67 [2023-11-29 05:47:07,510 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 23 treesize of output 11 [2023-11-29 05:47:08,594 INFO L349 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2023-11-29 05:47:08,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2023-11-29 05:47:08,727 INFO L349 Elim1Store]: treesize reduction 152, result has 20.8 percent of original size [2023-11-29 05:47:08,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 50 treesize of output 76 [2023-11-29 05:47:08,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 63 [2023-11-29 05:47:08,941 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 23 treesize of output 11 [2023-11-29 05:47:10,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:47:10,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:47:10,729 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-11-29 05:47:10,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 34 [2023-11-29 05:47:10,807 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:47:11,053 INFO L349 Elim1Store]: treesize reduction 329, result has 25.2 percent of original size [2023-11-29 05:47:11,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 77 treesize of output 160 [2023-11-29 05:47:11,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 68 [2023-11-29 05:47:11,391 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 23 treesize of output 11 [2023-11-29 05:47:13,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:47:13,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:47:13,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:47:13,338 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-29 05:47:13,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 15 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2023-11-29 05:47:13,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 80 [2023-11-29 05:47:13,533 INFO L349 Elim1Store]: treesize reduction 132, result has 34.3 percent of original size [2023-11-29 05:47:13,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 16 case distinctions, treesize of input 70 treesize of output 112 [2023-11-29 05:47:13,583 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 23 treesize of output 11 [2023-11-29 05:47:13,861 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 7 [2023-11-29 05:47:14,384 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 23 treesize of output 11 [2023-11-29 05:47:14,465 INFO L349 Elim1Store]: treesize reduction 90, result has 18.2 percent of original size [2023-11-29 05:47:14,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 38 [2023-11-29 05:47:14,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 29 [2023-11-29 05:47:15,278 INFO L349 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2023-11-29 05:47:15,278 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 31 treesize of output 43 [2023-11-29 05:47:15,353 INFO L349 Elim1Store]: treesize reduction 130, result has 13.3 percent of original size [2023-11-29 05:47:15,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 39 treesize of output 50 [2023-11-29 05:47:15,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 37 [2023-11-29 05:47:15,410 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 23 treesize of output 11 [2023-11-29 05:47:16,018 INFO L349 Elim1Store]: treesize reduction 72, result has 35.1 percent of original size [2023-11-29 05:47:16,019 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 38 treesize of output 63 [2023-11-29 05:47:16,099 INFO L349 Elim1Store]: treesize reduction 158, result has 11.2 percent of original size [2023-11-29 05:47:16,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 58 [2023-11-29 05:47:16,111 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 73 treesize of output 41 [2023-11-29 05:47:16,169 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 23 treesize of output 11 [2023-11-29 05:47:16,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:47:16,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:47:17,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:47:17,070 INFO L349 Elim1Store]: treesize reduction 186, result has 9.7 percent of original size [2023-11-29 05:47:17,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 49 treesize of output 66 [2023-11-29 05:47:17,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 37 [2023-11-29 05:47:17,143 INFO L349 Elim1Store]: treesize reduction 18, result has 58.1 percent of original size [2023-11-29 05:47:17,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 43 [2023-11-29 05:47:17,193 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 23 treesize of output 11 [2023-11-29 05:47:17,517 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 7 [2023-11-29 05:47:17,805 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 23 treesize of output 11 [2023-11-29 05:47:18,057 INFO L349 Elim1Store]: treesize reduction 314, result has 12.3 percent of original size [2023-11-29 05:47:18,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 54 treesize of output 74 [2023-11-29 05:47:18,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 34 [2023-11-29 05:47:19,468 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:47:19,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 29 [2023-11-29 05:47:19,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:47:19,679 INFO L349 Elim1Store]: treesize reduction 294, result has 12.0 percent of original size [2023-11-29 05:47:19,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 27 case distinctions, treesize of input 51 treesize of output 74 [2023-11-29 05:47:19,779 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 05:47:19,779 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 13 treesize of output 13 [2023-11-29 05:47:19,795 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 23 treesize of output 11 [2023-11-29 05:47:20,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 05:47:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 283 proven. 843 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-11-29 05:47:20,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:47:26,739 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:47:26,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329226419] [2023-11-29 05:47:26,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329226419] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:47:26,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [571250599] [2023-11-29 05:47:26,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:26,740 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-29 05:47:26,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 [2023-11-29 05:47:26,741 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-29 05:47:26,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6841a496-e68c-4076-b4fb-edd70864f7fd/bin/uautomizer-verify-BQ2R08f2Ya/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process