./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/string-1.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_8d26229e-9868-4069-bcf0-63b167e58c32/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d26229e-9868-4069-bcf0-63b167e58c32/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d26229e-9868-4069-bcf0-63b167e58c32/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d26229e-9868-4069-bcf0-63b167e58c32/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/string-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d26229e-9868-4069-bcf0-63b167e58c32/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d26229e-9868-4069-bcf0-63b167e58c32/bin/uautomizer-verify-VRDe98Ueme --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 7c71ebd98a3b6e7de0397eeeb86fda8d96b2d4c8ea0b8e1766ce392ff80613de --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:49:38,605 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:49:38,671 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d26229e-9868-4069-bcf0-63b167e58c32/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:49:38,677 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:49:38,677 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:49:38,701 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:49:38,702 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:49:38,703 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:49:38,704 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:49:38,704 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:49:38,705 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:49:38,705 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:49:38,706 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:49:38,707 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:49:38,707 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:49:38,708 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:49:38,708 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:49:38,709 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:49:38,709 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:49:38,710 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:49:38,710 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:49:38,711 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:49:38,711 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:49:38,712 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:49:38,712 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:49:38,712 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:49:38,713 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:49:38,713 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:49:38,714 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:49:38,714 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:49:38,714 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:49:38,715 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:49:38,715 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:49:38,715 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:49:38,716 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:49:38,716 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:49:38,716 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:49:38,716 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:49:38,717 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:49:38,717 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:49:38,717 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:49:38,717 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:49:38,718 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_8d26229e-9868-4069-bcf0-63b167e58c32/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d26229e-9868-4069-bcf0-63b167e58c32/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c71ebd98a3b6e7de0397eeeb86fda8d96b2d4c8ea0b8e1766ce392ff80613de [2023-11-26 10:49:38,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:49:39,028 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:49:39,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:49:39,033 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:49:39,033 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:49:39,034 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d26229e-9868-4069-bcf0-63b167e58c32/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/loops/string-1.i [2023-11-26 10:49:42,194 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:49:42,535 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:49:42,537 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d26229e-9868-4069-bcf0-63b167e58c32/sv-benchmarks/c/loops/string-1.i [2023-11-26 10:49:42,547 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d26229e-9868-4069-bcf0-63b167e58c32/bin/uautomizer-verify-VRDe98Ueme/data/ed8ff4f2c/a6497096c4ec4e3c9662a711f7c05fa7/FLAGb995db2b1 [2023-11-26 10:49:42,569 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d26229e-9868-4069-bcf0-63b167e58c32/bin/uautomizer-verify-VRDe98Ueme/data/ed8ff4f2c/a6497096c4ec4e3c9662a711f7c05fa7 [2023-11-26 10:49:42,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:49:42,578 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:49:42,580 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:49:42,580 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:49:42,586 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:49:42,589 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:49:42" (1/1) ... [2023-11-26 10:49:42,590 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36747d78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:42, skipping insertion in model container [2023-11-26 10:49:42,591 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:49:42" (1/1) ... [2023-11-26 10:49:42,618 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:49:42,813 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_8d26229e-9868-4069-bcf0-63b167e58c32/sv-benchmarks/c/loops/string-1.i[896,909] [2023-11-26 10:49:42,852 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:49:42,863 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:49:42,876 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_8d26229e-9868-4069-bcf0-63b167e58c32/sv-benchmarks/c/loops/string-1.i[896,909] [2023-11-26 10:49:42,895 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:49:42,910 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:49:42,911 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:42 WrapperNode [2023-11-26 10:49:42,911 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:49:42,912 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:49:42,913 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:49:42,913 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:49:42,920 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:42" (1/1) ... [2023-11-26 10:49:42,942 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:42" (1/1) ... [2023-11-26 10:49:42,966 INFO L138 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 127 [2023-11-26 10:49:42,966 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:49:42,967 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:49:42,967 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:49:42,968 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:49:42,978 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:42" (1/1) ... [2023-11-26 10:49:42,979 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:42" (1/1) ... [2023-11-26 10:49:42,982 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:42" (1/1) ... [2023-11-26 10:49:42,995 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 4, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-26 10:49:42,995 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:42" (1/1) ... [2023-11-26 10:49:42,996 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:42" (1/1) ... [2023-11-26 10:49:43,007 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:42" (1/1) ... [2023-11-26 10:49:43,011 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:42" (1/1) ... [2023-11-26 10:49:43,022 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:42" (1/1) ... [2023-11-26 10:49:43,032 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:42" (1/1) ... [2023-11-26 10:49:43,035 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:49:43,036 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:49:43,036 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:49:43,037 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:49:43,038 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:42" (1/1) ... [2023-11-26 10:49:43,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:49:43,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d26229e-9868-4069-bcf0-63b167e58c32/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:43,072 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d26229e-9868-4069-bcf0-63b167e58c32/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:49:43,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d26229e-9868-4069-bcf0-63b167e58c32/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:49:43,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:49:43,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:49:43,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:49:43,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:49:43,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:49:43,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:49:43,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:49:43,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:49:43,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:49:43,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:49:43,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:49:43,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:49:43,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:49:43,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:49:43,197 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:49:43,207 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:49:43,473 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:49:43,502 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:49:43,503 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-26 10:49:43,504 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:49:43 BoogieIcfgContainer [2023-11-26 10:49:43,504 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:49:43,507 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:49:43,507 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:49:43,510 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:49:43,512 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:49:42" (1/3) ... [2023-11-26 10:49:43,513 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b158c29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:49:43, skipping insertion in model container [2023-11-26 10:49:43,513 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:42" (2/3) ... [2023-11-26 10:49:43,514 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b158c29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:49:43, skipping insertion in model container [2023-11-26 10:49:43,514 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:49:43" (3/3) ... [2023-11-26 10:49:43,515 INFO L112 eAbstractionObserver]: Analyzing ICFG string-1.i [2023-11-26 10:49:43,533 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:49:43,534 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:49:43,583 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:49:43,590 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;@703df9f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:49:43,591 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:49:43,595 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.8) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:43,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 10:49:43,601 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:43,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:43,603 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:43,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:43,608 INFO L85 PathProgramCache]: Analyzing trace with hash 677504398, now seen corresponding path program 1 times [2023-11-26 10:49:43,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:43,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420187137] [2023-11-26 10:49:43,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:43,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:43,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:43,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:43,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420187137] [2023-11-26 10:49:43,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420187137] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:43,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:43,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:49:43,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405395208] [2023-11-26 10:49:43,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:43,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:49:43,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:43,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:49:43,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:49:43,926 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.8) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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) [2023-11-26 10:49:44,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:44,016 INFO L93 Difference]: Finished difference Result 52 states and 86 transitions. [2023-11-26 10:49:44,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:49:44,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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) Word has length 15 [2023-11-26 10:49:44,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:44,028 INFO L225 Difference]: With dead ends: 52 [2023-11-26 10:49:44,028 INFO L226 Difference]: Without dead ends: 27 [2023-11-26 10:49:44,031 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 [2023-11-26 10:49:44,038 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:44,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 40 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:49:44,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-26 10:49:44,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2023-11-26 10:49:44,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:44,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2023-11-26 10:49:44,078 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 15 [2023-11-26 10:49:44,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:44,079 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2023-11-26 10:49:44,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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) [2023-11-26 10:49:44,079 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-11-26 10:49:44,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-26 10:49:44,080 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:44,080 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:44,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:49:44,081 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:44,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:44,082 INFO L85 PathProgramCache]: Analyzing trace with hash -933915459, now seen corresponding path program 1 times [2023-11-26 10:49:44,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:44,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153103272] [2023-11-26 10:49:44,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:44,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:44,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:44,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:49:44,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:44,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153103272] [2023-11-26 10:49:44,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153103272] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:49:44,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139537550] [2023-11-26 10:49:44,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:44,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:44,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d26229e-9868-4069-bcf0-63b167e58c32/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:44,256 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d26229e-9868-4069-bcf0-63b167e58c32/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:44,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d26229e-9868-4069-bcf0-63b167e58c32/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:49:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:44,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:49:44,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:44,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:49:44,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:44,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:49:44,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139537550] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:44,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:49:44,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-26 10:49:44,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517446496] [2023-11-26 10:49:44,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:44,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:49:44,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:44,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:49:44,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:49:44,427 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:44,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:44,509 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2023-11-26 10:49:44,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:49:44,509 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-26 10:49:44,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:44,511 INFO L225 Difference]: With dead ends: 69 [2023-11-26 10:49:44,511 INFO L226 Difference]: Without dead ends: 51 [2023-11-26 10:49:44,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:49:44,513 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 20 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:44,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 78 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:49:44,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-26 10:49:44,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 27. [2023-11-26 10:49:44,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:44,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-11-26 10:49:44,522 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 19 [2023-11-26 10:49:44,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:44,522 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-11-26 10:49:44,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:44,523 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-11-26 10:49:44,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 10:49:44,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:44,524 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:44,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d26229e-9868-4069-bcf0-63b167e58c32/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:44,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d26229e-9868-4069-bcf0-63b167e58c32/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:44,731 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:44,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:44,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1614794180, now seen corresponding path program 2 times [2023-11-26 10:49:44,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:44,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194206935] [2023-11-26 10:49:44,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:44,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:44,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:45,021 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 10:49:45,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:45,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194206935] [2023-11-26 10:49:45,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194206935] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:49:45,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660851870] [2023-11-26 10:49:45,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:49:45,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:45,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d26229e-9868-4069-bcf0-63b167e58c32/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:45,034 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d26229e-9868-4069-bcf0-63b167e58c32/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:45,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d26229e-9868-4069-bcf0-63b167e58c32/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:49:45,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 10:49:45,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:49:45,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 10:49:45,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-26 10:49:45,367 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:49:45,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660851870] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:45,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:49:45,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2023-11-26 10:49:45,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751199318] [2023-11-26 10:49:45,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:45,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:49:45,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:45,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:49:45,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:49:45,372 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2023-11-26 10:49:45,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:45,439 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2023-11-26 10:49:45,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:49:45,440 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 25 [2023-11-26 10:49:45,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:45,441 INFO L225 Difference]: With dead ends: 37 [2023-11-26 10:49:45,441 INFO L226 Difference]: Without dead ends: 0 [2023-11-26 10:49:45,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:49:45,446 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:45,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 50 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:49:45,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-26 10:49:45,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-26 10:49:45,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:49:45,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-26 10:49:45,450 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2023-11-26 10:49:45,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:45,450 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-26 10:49:45,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2023-11-26 10:49:45,451 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-26 10:49:45,451 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-26 10:49:45,456 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-26 10:49:45,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d26229e-9868-4069-bcf0-63b167e58c32/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-26 10:49:45,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d26229e-9868-4069-bcf0-63b167e58c32/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:45,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-26 10:49:45,676 INFO L899 garLoopResultBuilder]: For program point L19(lines 19 21) no Hoare annotation was computed. [2023-11-26 10:49:45,677 INFO L899 garLoopResultBuilder]: For program point L19-2(lines 18 23) no Hoare annotation was computed. [2023-11-26 10:49:45,677 INFO L899 garLoopResultBuilder]: For program point main_returnLabel#1(lines 28 72) no Hoare annotation was computed. [2023-11-26 10:49:45,677 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 20) no Hoare annotation was computed. [2023-11-26 10:49:45,677 INFO L899 garLoopResultBuilder]: For program point L20(line 20) no Hoare annotation was computed. [2023-11-26 10:49:45,678 INFO L899 garLoopResultBuilder]: For program point L53-2(lines 53 65) no Hoare annotation was computed. [2023-11-26 10:49:45,678 INFO L902 garLoopResultBuilder]: At program point L37-3(lines 37 38) the Hoare annotation is: true [2023-11-26 10:49:45,678 INFO L899 garLoopResultBuilder]: For program point L37-4(lines 37 38) no Hoare annotation was computed. [2023-11-26 10:49:45,678 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-26 10:49:45,679 INFO L902 garLoopResultBuilder]: At program point L33-3(lines 33 34) the Hoare annotation is: true [2023-11-26 10:49:45,679 INFO L899 garLoopResultBuilder]: For program point L33-4(lines 33 34) no Hoare annotation was computed. [2023-11-26 10:49:45,679 INFO L899 garLoopResultBuilder]: For program point L46-1(lines 46 47) no Hoare annotation was computed. [2023-11-26 10:49:45,679 INFO L902 garLoopResultBuilder]: At program point L46-3(lines 46 47) the Hoare annotation is: true [2023-11-26 10:49:45,680 INFO L899 garLoopResultBuilder]: For program point L46-4(lines 29 72) no Hoare annotation was computed. [2023-11-26 10:49:45,680 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-26 10:49:45,680 INFO L899 garLoopResultBuilder]: For program point L42-1(lines 42 43) no Hoare annotation was computed. [2023-11-26 10:49:45,684 INFO L902 garLoopResultBuilder]: At program point L42-3(lines 42 43) the Hoare annotation is: true [2023-11-26 10:49:45,685 INFO L899 garLoopResultBuilder]: For program point L42-4(lines 42 43) no Hoare annotation was computed. [2023-11-26 10:49:45,685 INFO L899 garLoopResultBuilder]: For program point L55(lines 55 64) no Hoare annotation was computed. [2023-11-26 10:49:45,685 INFO L902 garLoopResultBuilder]: At program point L55-2(lines 53 65) the Hoare annotation is: true [2023-11-26 10:49:45,685 INFO L899 garLoopResultBuilder]: For program point L39(line 39) no Hoare annotation was computed. [2023-11-26 10:49:45,686 INFO L899 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2023-11-26 10:49:45,689 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-11-26 10:49:45,691 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-26 10:49:45,703 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 10:49:45 BoogieIcfgContainer [2023-11-26 10:49:45,703 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-26 10:49:45,704 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-26 10:49:45,704 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-26 10:49:45,705 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-26 10:49:45,705 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:49:43" (3/4) ... [2023-11-26 10:49:45,707 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-26 10:49:45,719 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2023-11-26 10:49:45,720 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-26 10:49:45,720 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-26 10:49:45,721 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-26 10:49:45,831 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d26229e-9868-4069-bcf0-63b167e58c32/bin/uautomizer-verify-VRDe98Ueme/witness.graphml [2023-11-26 10:49:45,832 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d26229e-9868-4069-bcf0-63b167e58c32/bin/uautomizer-verify-VRDe98Ueme/witness.yml [2023-11-26 10:49:45,832 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-26 10:49:45,833 INFO L158 Benchmark]: Toolchain (without parser) took 3254.60ms. Allocated memory was 140.5MB in the beginning and 218.1MB in the end (delta: 77.6MB). Free memory was 108.4MB in the beginning and 122.3MB in the end (delta: -13.9MB). Peak memory consumption was 67.2MB. Max. memory is 16.1GB. [2023-11-26 10:49:45,833 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 111.1MB. Free memory is still 67.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 10:49:45,834 INFO L158 Benchmark]: CACSL2BoogieTranslator took 331.44ms. Allocated memory is still 140.5MB. Free memory was 108.2MB in the beginning and 97.0MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-26 10:49:45,834 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.31ms. Allocated memory is still 140.5MB. Free memory was 97.0MB in the beginning and 95.2MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 10:49:45,835 INFO L158 Benchmark]: Boogie Preprocessor took 68.31ms. Allocated memory is still 140.5MB. Free memory was 95.2MB in the beginning and 93.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 10:49:45,835 INFO L158 Benchmark]: RCFGBuilder took 467.84ms. Allocated memory is still 140.5MB. Free memory was 92.9MB in the beginning and 78.9MB in the end (delta: 14.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-26 10:49:45,836 INFO L158 Benchmark]: TraceAbstraction took 2197.03ms. Allocated memory was 140.5MB in the beginning and 218.1MB in the end (delta: 77.6MB). Free memory was 78.2MB in the beginning and 127.4MB in the end (delta: -49.2MB). Peak memory consumption was 29.5MB. Max. memory is 16.1GB. [2023-11-26 10:49:45,836 INFO L158 Benchmark]: Witness Printer took 128.02ms. Allocated memory is still 218.1MB. Free memory was 126.5MB in the beginning and 122.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-26 10:49:45,838 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 111.1MB. Free memory is still 67.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 331.44ms. Allocated memory is still 140.5MB. Free memory was 108.2MB in the beginning and 97.0MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 54.31ms. Allocated memory is still 140.5MB. Free memory was 97.0MB in the beginning and 95.2MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 68.31ms. Allocated memory is still 140.5MB. Free memory was 95.2MB in the beginning and 93.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 467.84ms. Allocated memory is still 140.5MB. Free memory was 92.9MB in the beginning and 78.9MB in the end (delta: 14.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 2197.03ms. Allocated memory was 140.5MB in the beginning and 218.1MB in the end (delta: 77.6MB). Free memory was 78.2MB in the beginning and 127.4MB in the end (delta: -49.2MB). Peak memory consumption was 29.5MB. Max. memory is 16.1GB. * Witness Printer took 128.02ms. Allocated memory is still 218.1MB. Free memory was 126.5MB in the beginning and 122.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 20]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.1s, OverallIterations: 3, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 28 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 28 mSDsluCounter, 168 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 115 mSDsCounter, 17 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 105 IncrementalHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 17 mSolverCounterUnsat, 53 mSDtfsCounter, 105 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=2, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 30 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 19 NumberOfFragments, 5 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 103 NumberOfCodeBlocks, 95 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 116 ConstructedInterpolants, 0 QuantifiedInterpolants, 160 SizeOfPredicates, 4 NumberOfNonLiveVariables, 182 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 33/46 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 53]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2023-11-26 10:49:45,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d26229e-9868-4069-bcf0-63b167e58c32/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE