./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-lopstr16/base_case.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/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_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-lopstr16/base_case.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f9dd43881ccf56b8e6da6d28cc61ed7f891fae597b16e121f5ac65378400d596 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:39:16,855 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:39:16,918 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 20:39:16,922 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:39:16,923 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:39:16,949 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:39:16,950 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:39:16,950 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:39:16,951 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:39:16,951 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:39:16,952 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:39:16,952 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:39:16,953 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:39:16,954 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:39:16,954 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:39:16,955 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:39:16,955 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 20:39:16,956 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:39:16,956 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:39:16,957 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:39:16,957 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:39:16,958 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 20:39:16,959 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:39:16,959 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 20:39:16,960 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:39:16,960 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 20:39:16,961 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:39:16,961 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:39:16,962 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:39:16,962 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:39:16,963 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:39:16,963 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:39:16,963 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:39:16,964 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:39:16,964 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 20:39:16,964 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:39:16,964 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:39:16,964 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:39:16,964 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:39:16,965 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 20:39:16,965 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:39:16,965 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:39:16,965 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_fd123032-9b0b-4f6d-af7f-1f7e36d39251/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9dd43881ccf56b8e6da6d28cc61ed7f891fae597b16e121f5ac65378400d596 [2023-11-28 20:39:17,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:39:17,178 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:39:17,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:39:17,182 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:39:17,183 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:39:17,184 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-lopstr16/base_case.i [2023-11-28 20:39:19,970 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:39:20,171 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:39:20,171 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/sv-benchmarks/c/array-lopstr16/base_case.i [2023-11-28 20:39:20,177 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya/data/d0ed50fb2/a657f7805b254a588b46d29307edb98b/FLAG9eeb5ddf0 [2023-11-28 20:39:20,187 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya/data/d0ed50fb2/a657f7805b254a588b46d29307edb98b [2023-11-28 20:39:20,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:39:20,190 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:39:20,191 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:39:20,191 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:39:20,195 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:39:20,196 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:39:20" (1/1) ... [2023-11-28 20:39:20,197 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68eda8e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:20, skipping insertion in model container [2023-11-28 20:39:20,197 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:39:20" (1/1) ... [2023-11-28 20:39:20,217 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:39:20,340 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/sv-benchmarks/c/array-lopstr16/base_case.i[802,815] [2023-11-28 20:39:20,357 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:39:20,366 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:39:20,375 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/sv-benchmarks/c/array-lopstr16/base_case.i[802,815] [2023-11-28 20:39:20,381 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:39:20,396 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:39:20,397 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:20 WrapperNode [2023-11-28 20:39:20,397 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:39:20,398 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:39:20,398 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:39:20,398 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:39:20,403 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:20" (1/1) ... [2023-11-28 20:39:20,411 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:20" (1/1) ... [2023-11-28 20:39:20,427 INFO L138 Inliner]: procedures = 19, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2023-11-28 20:39:20,427 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:39:20,428 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:39:20,428 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:39:20,428 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:39:20,436 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:20" (1/1) ... [2023-11-28 20:39:20,437 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:20" (1/1) ... [2023-11-28 20:39:20,439 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:20" (1/1) ... [2023-11-28 20:39:20,454 INFO L175 MemorySlicer]: Split 11 memory accesses to 3 slices as follows [2, 3, 6]. 55 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 5 writes are split as follows [0, 2, 3]. [2023-11-28 20:39:20,455 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:20" (1/1) ... [2023-11-28 20:39:20,455 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:20" (1/1) ... [2023-11-28 20:39:20,461 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:20" (1/1) ... [2023-11-28 20:39:20,464 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:20" (1/1) ... [2023-11-28 20:39:20,466 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:20" (1/1) ... [2023-11-28 20:39:20,467 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:20" (1/1) ... [2023-11-28 20:39:20,470 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:39:20,471 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:39:20,471 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:39:20,471 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:39:20,472 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:20" (1/1) ... [2023-11-28 20:39:20,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:39:20,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:20,496 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:39:20,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:39:20,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-28 20:39:20,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-28 20:39:20,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-28 20:39:20,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:39:20,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 20:39:20,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-28 20:39:20,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-28 20:39:20,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-28 20:39:20,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-28 20:39:20,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-28 20:39:20,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 20:39:20,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 20:39:20,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-28 20:39:20,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-28 20:39:20,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:39:20,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:39:20,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-28 20:39:20,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-28 20:39:20,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-28 20:39:20,630 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:39:20,632 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:39:20,757 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:39:20,781 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:39:20,781 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-28 20:39:20,782 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:39:20 BoogieIcfgContainer [2023-11-28 20:39:20,782 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:39:20,784 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:39:20,785 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:39:20,788 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:39:20,788 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:39:20" (1/3) ... [2023-11-28 20:39:20,789 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@194a309 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:39:20, skipping insertion in model container [2023-11-28 20:39:20,789 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:20" (2/3) ... [2023-11-28 20:39:20,789 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@194a309 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:39:20, skipping insertion in model container [2023-11-28 20:39:20,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:39:20" (3/3) ... [2023-11-28 20:39:20,791 INFO L112 eAbstractionObserver]: Analyzing ICFG base_case.i [2023-11-28 20:39:20,805 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:39:20,805 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 20:39:20,844 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:39:20,850 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@766d7685, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:39:20,850 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-28 20:39:20,853 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:20,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-28 20:39:20,866 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:20,867 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:39:20,867 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:39:20,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:20,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1414323135, now seen corresponding path program 1 times [2023-11-28 20:39:20,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:20,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518892192] [2023-11-28 20:39:20,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:20,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:21,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:21,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:21,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518892192] [2023-11-28 20:39:21,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518892192] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:39:21,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:39:21,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:39:21,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80568335] [2023-11-28 20:39:21,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:39:21,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-28 20:39:21,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:21,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-28 20:39:21,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 20:39:21,063 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:21,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:21,086 INFO L93 Difference]: Finished difference Result 24 states and 33 transitions. [2023-11-28 20:39:21,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-28 20:39:21,089 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-28 20:39:21,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:21,097 INFO L225 Difference]: With dead ends: 24 [2023-11-28 20:39:21,097 INFO L226 Difference]: Without dead ends: 12 [2023-11-28 20:39:21,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 20:39:21,103 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:21,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:39:21,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-28 20:39:21,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-28 20:39:21,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:21,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2023-11-28 20:39:21,135 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 7 [2023-11-28 20:39:21,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:21,135 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2023-11-28 20:39:21,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:21,136 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2023-11-28 20:39:21,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-28 20:39:21,136 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:21,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:39:21,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 20:39:21,137 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:39:21,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:21,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1042144172, now seen corresponding path program 1 times [2023-11-28 20:39:21,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:21,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230296486] [2023-11-28 20:39:21,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:21,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:21,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:21,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:21,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:21,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230296486] [2023-11-28 20:39:21,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230296486] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:39:21,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:39:21,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:39:21,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182531430] [2023-11-28 20:39:21,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:39:21,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:39:21,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:21,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:39:21,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:39:21,214 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:21,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:21,240 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2023-11-28 20:39:21,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:39:21,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-28 20:39:21,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:21,241 INFO L225 Difference]: With dead ends: 30 [2023-11-28 20:39:21,241 INFO L226 Difference]: Without dead ends: 22 [2023-11-28 20:39:21,242 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 [2023-11-28 20:39:21,243 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:21,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 18 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:39:21,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-28 20:39:21,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 13. [2023-11-28 20:39:21,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:21,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2023-11-28 20:39:21,249 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 7 [2023-11-28 20:39:21,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:21,249 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2023-11-28 20:39:21,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:21,250 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2023-11-28 20:39:21,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-28 20:39:21,251 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:21,251 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:39:21,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 20:39:21,251 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:39:21,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:21,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1248044372, now seen corresponding path program 1 times [2023-11-28 20:39:21,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:21,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293532665] [2023-11-28 20:39:21,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:21,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:21,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:21,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:21,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293532665] [2023-11-28 20:39:21,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293532665] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:21,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860807973] [2023-11-28 20:39:21,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:21,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:21,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:21,395 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:21,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:39:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:21,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:39:21,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:21,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:21,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:39:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:21,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860807973] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:39:21,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:39:21,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-28 20:39:21,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993187815] [2023-11-28 20:39:21,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:39:21,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:39:21,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:21,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:39:21,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:39:21,579 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:21,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:21,641 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2023-11-28 20:39:21,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:39:21,642 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-28 20:39:21,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:21,643 INFO L225 Difference]: With dead ends: 52 [2023-11-28 20:39:21,643 INFO L226 Difference]: Without dead ends: 44 [2023-11-28 20:39:21,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:39:21,645 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 60 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:21,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 42 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:39:21,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-28 20:39:21,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 22. [2023-11-28 20:39:21,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:21,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2023-11-28 20:39:21,652 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 10 [2023-11-28 20:39:21,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:21,652 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2023-11-28 20:39:21,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:21,653 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2023-11-28 20:39:21,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-28 20:39:21,653 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:21,654 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:39:21,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 20:39:21,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:21,859 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:39:21,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:21,860 INFO L85 PathProgramCache]: Analyzing trace with hash -483780180, now seen corresponding path program 2 times [2023-11-28 20:39:21,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:21,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330113285] [2023-11-28 20:39:21,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:21,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:22,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:22,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330113285] [2023-11-28 20:39:22,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330113285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:22,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652553757] [2023-11-28 20:39:22,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:39:22,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:22,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:22,107 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:22,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:39:22,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:39:22,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:39:22,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 20:39:22,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:22,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:39:22,399 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:22,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652553757] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:39:22,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:39:22,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-28 20:39:22,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805572996] [2023-11-28 20:39:22,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:39:22,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-28 20:39:22,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:22,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-28 20:39:22,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-28 20:39:22,402 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:22,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:22,547 INFO L93 Difference]: Finished difference Result 112 states and 140 transitions. [2023-11-28 20:39:22,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 20:39:22,547 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-28 20:39:22,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:22,549 INFO L225 Difference]: With dead ends: 112 [2023-11-28 20:39:22,549 INFO L226 Difference]: Without dead ends: 104 [2023-11-28 20:39:22,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-28 20:39:22,550 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 196 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:22,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 90 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:39:22,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-28 20:39:22,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 40. [2023-11-28 20:39:22,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:22,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2023-11-28 20:39:22,559 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 19 [2023-11-28 20:39:22,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:22,559 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2023-11-28 20:39:22,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:22,559 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2023-11-28 20:39:22,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-28 20:39:22,560 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:22,560 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:39:22,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 20:39:22,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:22,761 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:39:22,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:22,762 INFO L85 PathProgramCache]: Analyzing trace with hash 600315564, now seen corresponding path program 3 times [2023-11-28 20:39:22,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:22,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660526840] [2023-11-28 20:39:22,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:22,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:23,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:23,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660526840] [2023-11-28 20:39:23,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660526840] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:23,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472971811] [2023-11-28 20:39:23,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:39:23,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:23,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:23,281 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:23,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:39:57,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-28 20:39:57,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:39:57,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:39:57,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:57,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:39:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:58,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472971811] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:39:58,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:39:58,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-28 20:39:58,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888272574] [2023-11-28 20:39:58,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:39:58,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-28 20:39:58,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:58,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-28 20:39:58,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-28 20:39:58,243 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:58,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:58,504 INFO L93 Difference]: Finished difference Result 232 states and 290 transitions. [2023-11-28 20:39:58,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-28 20:39:58,509 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-28 20:39:58,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:58,512 INFO L225 Difference]: With dead ends: 232 [2023-11-28 20:39:58,512 INFO L226 Difference]: Without dead ends: 224 [2023-11-28 20:39:58,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-28 20:39:58,513 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 460 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:58,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 186 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:39:58,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-11-28 20:39:58,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 76. [2023-11-28 20:39:58,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.3333333333333333) internal successors, (100), 75 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:58,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 100 transitions. [2023-11-28 20:39:58,526 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 100 transitions. Word has length 37 [2023-11-28 20:39:58,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:58,526 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 100 transitions. [2023-11-28 20:39:58,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:58,527 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 100 transitions. [2023-11-28 20:39:58,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-28 20:39:58,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:58,529 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:39:58,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 20:39:58,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:58,735 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:39:58,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:58,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1947971412, now seen corresponding path program 4 times [2023-11-28 20:39:58,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:58,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201990813] [2023-11-28 20:39:58,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:58,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:58,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:00,297 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:40:00,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:40:00,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201990813] [2023-11-28 20:40:00,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201990813] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:40:00,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403133194] [2023-11-28 20:40:00,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:40:00,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:40:00,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:40:00,298 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:40:00,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd123032-9b0b-4f6d-af7f-1f7e36d39251/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process