./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-47.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-47.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash adf480f71c98f97b1e3553d7ccd07596f803ed516785c8ed007d232ae0455bf0 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:12:49,352 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:12:49,477 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:12:49,488 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:12:49,489 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:12:49,529 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:12:49,530 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:12:49,530 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:12:49,531 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:12:49,537 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:12:49,537 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:12:49,538 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:12:49,538 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:12:49,540 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:12:49,540 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:12:49,540 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:12:49,541 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:12:49,541 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:12:49,542 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:12:49,542 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:12:49,542 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:12:49,543 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:12:49,544 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:12:49,544 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:12:49,545 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:12:49,545 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:12:49,547 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:12:49,547 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:12:49,548 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:12:49,548 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:12:49,549 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:12:49,550 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:12:49,550 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:12:49,550 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:12:49,550 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:12:49,551 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:12:49,551 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:12:49,551 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:12:49,551 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:12:49,552 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:12:49,552 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:12:49,552 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:12:49,552 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:12:49,552 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:12:49,553 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:12:49,553 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adf480f71c98f97b1e3553d7ccd07596f803ed516785c8ed007d232ae0455bf0 [2023-11-19 05:12:49,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:12:49,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:12:49,964 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:12:49,966 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:12:49,966 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:12:49,969 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-47.i [2023-11-19 05:12:53,111 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:12:53,307 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:12:53,307 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-47.i [2023-11-19 05:12:53,317 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/data/e0e09c6ce/cb336419f5b94ac6a8d8edf1bbcc2a0a/FLAG66294659b [2023-11-19 05:12:53,331 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/data/e0e09c6ce/cb336419f5b94ac6a8d8edf1bbcc2a0a [2023-11-19 05:12:53,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:12:53,335 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:12:53,336 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:12:53,337 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:12:53,342 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:12:53,343 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:12:53" (1/1) ... [2023-11-19 05:12:53,344 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7599637f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:53, skipping insertion in model container [2023-11-19 05:12:53,344 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:12:53" (1/1) ... [2023-11-19 05:12:53,374 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:12:53,577 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_d533bf52-1820-42a3-bf9d-de0dacc03d78/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-47.i[915,928] [2023-11-19 05:12:53,656 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:12:53,677 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:12:53,697 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_d533bf52-1820-42a3-bf9d-de0dacc03d78/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-47.i[915,928] [2023-11-19 05:12:53,731 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:12:53,756 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:12:53,757 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:53 WrapperNode [2023-11-19 05:12:53,757 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:12:53,759 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:12:53,760 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:12:53,760 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:12:53,768 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:53" (1/1) ... [2023-11-19 05:12:53,789 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:53" (1/1) ... [2023-11-19 05:12:53,832 INFO L138 Inliner]: procedures = 26, calls = 23, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 90 [2023-11-19 05:12:53,833 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:12:53,834 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:12:53,834 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:12:53,834 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:12:53,844 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:53" (1/1) ... [2023-11-19 05:12:53,845 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:53" (1/1) ... [2023-11-19 05:12:53,853 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:53" (1/1) ... [2023-11-19 05:12:53,853 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:53" (1/1) ... [2023-11-19 05:12:53,867 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:53" (1/1) ... [2023-11-19 05:12:53,879 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:53" (1/1) ... [2023-11-19 05:12:53,886 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:53" (1/1) ... [2023-11-19 05:12:53,887 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:53" (1/1) ... [2023-11-19 05:12:53,890 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:12:53,897 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:12:53,897 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:12:53,898 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:12:53,898 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:53" (1/1) ... [2023-11-19 05:12:53,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:12:53,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:53,932 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:12:53,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:12:53,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:12:53,968 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 05:12:53,968 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 05:12:53,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:12:53,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:12:53,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:12:54,070 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:12:54,073 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:12:54,389 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:12:54,558 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:12:54,559 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 05:12:54,564 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:12:54 BoogieIcfgContainer [2023-11-19 05:12:54,564 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:12:54,567 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:12:54,567 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:12:54,571 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:12:54,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:12:53" (1/3) ... [2023-11-19 05:12:54,572 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e9150f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:12:54, skipping insertion in model container [2023-11-19 05:12:54,573 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:53" (2/3) ... [2023-11-19 05:12:54,573 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e9150f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:12:54, skipping insertion in model container [2023-11-19 05:12:54,573 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:12:54" (3/3) ... [2023-11-19 05:12:54,575 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_25-while_file-47.i [2023-11-19 05:12:54,596 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:12:54,597 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:12:54,651 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:12:54,659 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=FINITE_AUTOMATA, 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;@7531cd36, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:12:54,659 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:12:54,664 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-19 05:12:54,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-19 05:12:54,674 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:54,674 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:54,675 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:54,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:54,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1066912942, now seen corresponding path program 1 times [2023-11-19 05:12:54,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:54,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762525137] [2023-11-19 05:12:54,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:54,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:55,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 05:12:55,064 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 05:12:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 05:12:55,281 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-19 05:12:55,285 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 05:12:55,286 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-19 05:12:55,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:12:55,293 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-19 05:12:55,297 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-19 05:12:55,373 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 05:12:55 BoogieIcfgContainer [2023-11-19 05:12:55,374 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-19 05:12:55,376 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 05:12:55,376 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 05:12:55,376 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 05:12:55,377 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:12:54" (3/4) ... [2023-11-19 05:12:55,383 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-19 05:12:55,384 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 05:12:55,386 INFO L158 Benchmark]: Toolchain (without parser) took 2050.22ms. Allocated memory is still 130.0MB. Free memory was 94.3MB in the beginning and 82.9MB in the end (delta: 11.4MB). Peak memory consumption was 13.1MB. Max. memory is 16.1GB. [2023-11-19 05:12:55,386 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 130.0MB. Free memory is still 102.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 05:12:55,387 INFO L158 Benchmark]: CACSL2BoogieTranslator took 421.07ms. Allocated memory is still 130.0MB. Free memory was 94.3MB in the beginning and 82.1MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-19 05:12:55,389 INFO L158 Benchmark]: Boogie Procedure Inliner took 74.27ms. Allocated memory is still 130.0MB. Free memory was 82.1MB in the beginning and 80.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 05:12:55,389 INFO L158 Benchmark]: Boogie Preprocessor took 62.21ms. Allocated memory is still 130.0MB. Free memory was 80.1MB in the beginning and 78.9MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 05:12:55,395 INFO L158 Benchmark]: RCFGBuilder took 667.20ms. Allocated memory is still 130.0MB. Free memory was 78.9MB in the beginning and 56.1MB in the end (delta: 22.8MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2023-11-19 05:12:55,396 INFO L158 Benchmark]: TraceAbstraction took 806.81ms. Allocated memory is still 130.0MB. Free memory was 55.4MB in the beginning and 83.7MB in the end (delta: -28.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 05:12:55,397 INFO L158 Benchmark]: Witness Printer took 8.31ms. Allocated memory is still 130.0MB. Free memory was 83.7MB in the beginning and 82.9MB in the end (delta: 815.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 05:12:55,406 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 130.0MB. Free memory is still 102.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 421.07ms. Allocated memory is still 130.0MB. Free memory was 94.3MB in the beginning and 82.1MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 74.27ms. Allocated memory is still 130.0MB. Free memory was 82.1MB in the beginning and 80.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 62.21ms. Allocated memory is still 130.0MB. Free memory was 80.1MB in the beginning and 78.9MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 667.20ms. Allocated memory is still 130.0MB. Free memory was 78.9MB in the beginning and 56.1MB in the end (delta: 22.8MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 806.81ms. Allocated memory is still 130.0MB. Free memory was 55.4MB in the beginning and 83.7MB in the end (delta: -28.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 8.31ms. Allocated memory is still 130.0MB. Free memory was 83.7MB in the beginning and 82.9MB in the end (delta: 815.8kB). There was no memory consumed. 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 - UnprovableResult [Line: 19]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 49, overapproximation of someUnaryDOUBLEoperation at line 24, overapproximation of someBinaryDOUBLEComparisonOperation at line 37, overapproximation of someUnaryFLOAToperation at line 49, overapproximation of someBinaryArithmeticFLOAToperation at line 49. Possible FailurePath: [L21] unsigned char isInitial = 0; [L22] double var_1_1 = 24.575; [L23] double var_1_8 = 128.5; [L24] float var_1_9 = -0.5; [L25] float var_1_10 = 200.4; [L26] unsigned long int var_1_11 = 4; [L27] unsigned char var_1_12 = 1; [L28] unsigned long int var_1_13 = 3607105345; [L29] signed char var_1_14 = 0; [L30] signed char var_1_15 = 0; [L31] signed char var_1_16 = 16; [L32] double last_1_var_1_1 = 24.575; [L33] float last_1_var_1_9 = -0.5; [L85] isInitial = 1 [L86] FCALL initially() [L87] COND TRUE 1 [L88] CALL updateLastVariables() [L77] last_1_var_1_1 = var_1_1 [L78] last_1_var_1_9 = var_1_9 [L88] RET updateLastVariables() [L89] CALL updateVariables() [L59] var_1_8 = __VERIFIER_nondet_double() [L60] CALL assume_abort_if_not((var_1_8 >= -922337.2036854765600e+13F && var_1_8 <= -1.0e-20F) || (var_1_8 <= 9223372.036854765600e+12F && var_1_8 >= 1.0e-20F )) VAL [\old(cond)=1, isInitial=1, last_1_var_1_1=983/40, last_1_var_1_9=4294967301, var_1_10=1002/5, var_1_11=4, var_1_12=1, var_1_13=3607105345, var_1_14=0, var_1_15=0, var_1_16=16, var_1_1=983/40, var_1_9=4294967301] [L20] COND FALSE !(!cond) [L60] RET assume_abort_if_not((var_1_8 >= -922337.2036854765600e+13F && var_1_8 <= -1.0e-20F) || (var_1_8 <= 9223372.036854765600e+12F && var_1_8 >= 1.0e-20F )) VAL [isInitial=1, last_1_var_1_1=983/40, last_1_var_1_9=4294967301, var_1_10=1002/5, var_1_11=4, var_1_12=1, var_1_13=3607105345, var_1_14=0, var_1_15=0, var_1_16=16, var_1_1=983/40, var_1_9=4294967301] [L61] var_1_10 = __VERIFIER_nondet_float() [L62] CALL assume_abort_if_not((var_1_10 >= 0.0F && var_1_10 <= -1.0e-20F) || (var_1_10 <= 9223372.036854765600e+12F && var_1_10 >= 1.0e-20F )) VAL [\old(cond)=1, isInitial=1, last_1_var_1_1=983/40, last_1_var_1_9=4294967301, var_1_10=4294967300, var_1_11=4, var_1_12=1, var_1_13=3607105345, var_1_14=0, var_1_15=0, var_1_16=16, var_1_1=983/40, var_1_9=4294967301] [L20] COND FALSE !(!cond) [L62] RET assume_abort_if_not((var_1_10 >= 0.0F && var_1_10 <= -1.0e-20F) || (var_1_10 <= 9223372.036854765600e+12F && var_1_10 >= 1.0e-20F )) VAL [isInitial=1, last_1_var_1_1=983/40, last_1_var_1_9=4294967301, var_1_10=4294967300, var_1_11=4, var_1_12=1, var_1_13=3607105345, var_1_14=0, var_1_15=0, var_1_16=16, var_1_1=983/40, var_1_9=4294967301] [L63] var_1_12 = __VERIFIER_nondet_uchar() [L64] CALL assume_abort_if_not(var_1_12 >= 0) VAL [\old(cond)=1, isInitial=1, last_1_var_1_1=983/40, last_1_var_1_9=4294967301, var_1_10=4294967300, var_1_11=4, var_1_12=1, var_1_13=3607105345, var_1_14=0, var_1_15=0, var_1_16=16, var_1_1=983/40, var_1_9=4294967301] [L20] COND FALSE !(!cond) [L64] RET assume_abort_if_not(var_1_12 >= 0) VAL [isInitial=1, last_1_var_1_1=983/40, last_1_var_1_9=4294967301, var_1_10=4294967300, var_1_11=4, var_1_12=1, var_1_13=3607105345, var_1_14=0, var_1_15=0, var_1_16=16, var_1_1=983/40, var_1_9=4294967301] [L65] CALL assume_abort_if_not(var_1_12 <= 1) VAL [\old(cond)=1, isInitial=1, last_1_var_1_1=983/40, last_1_var_1_9=4294967301, var_1_10=4294967300, var_1_11=4, var_1_12=1, var_1_13=3607105345, var_1_14=0, var_1_15=0, var_1_16=16, var_1_1=983/40, var_1_9=4294967301] [L20] COND FALSE !(!cond) [L65] RET assume_abort_if_not(var_1_12 <= 1) VAL [isInitial=1, last_1_var_1_1=983/40, last_1_var_1_9=4294967301, var_1_10=4294967300, var_1_11=4, var_1_12=1, var_1_13=3607105345, var_1_14=0, var_1_15=0, var_1_16=16, var_1_1=983/40, var_1_9=4294967301] [L66] var_1_13 = __VERIFIER_nondet_ulong() [L67] CALL assume_abort_if_not(var_1_13 >= 2147483647) VAL [\old(cond)=1, isInitial=1, last_1_var_1_1=983/40, last_1_var_1_9=4294967301, var_1_10=4294967300, var_1_11=4, var_1_12=1, var_1_13=4294967294, var_1_14=0, var_1_15=0, var_1_16=16, var_1_1=983/40, var_1_9=4294967301] [L20] COND FALSE !(!cond) [L67] RET assume_abort_if_not(var_1_13 >= 2147483647) VAL [isInitial=1, last_1_var_1_1=983/40, last_1_var_1_9=4294967301, var_1_10=4294967300, var_1_11=4, var_1_12=1, var_1_13=4294967294, var_1_14=0, var_1_15=0, var_1_16=16, var_1_1=983/40, var_1_9=4294967301] [L68] CALL assume_abort_if_not(var_1_13 <= 4294967294) VAL [\old(cond)=1, isInitial=1, last_1_var_1_1=983/40, last_1_var_1_9=4294967301, var_1_10=4294967300, var_1_11=4, var_1_12=1, var_1_13=4294967294, var_1_14=0, var_1_15=0, var_1_16=16, var_1_1=983/40, var_1_9=4294967301] [L20] COND FALSE !(!cond) [L68] RET assume_abort_if_not(var_1_13 <= 4294967294) VAL [isInitial=1, last_1_var_1_1=983/40, last_1_var_1_9=4294967301, var_1_10=4294967300, var_1_11=4, var_1_12=1, var_1_13=4294967294, var_1_14=0, var_1_15=0, var_1_16=16, var_1_1=983/40, var_1_9=4294967301] [L69] var_1_15 = __VERIFIER_nondet_char() [L70] CALL assume_abort_if_not(var_1_15 >= -1) VAL [\old(cond)=1, isInitial=1, last_1_var_1_1=983/40, last_1_var_1_9=4294967301, var_1_10=4294967300, var_1_11=4, var_1_12=1, var_1_13=4294967294, var_1_14=0, var_1_15=0, var_1_16=16, var_1_1=983/40, var_1_9=4294967301] [L20] COND FALSE !(!cond) [L70] RET assume_abort_if_not(var_1_15 >= -1) VAL [isInitial=1, last_1_var_1_1=983/40, last_1_var_1_9=4294967301, var_1_10=4294967300, var_1_11=4, var_1_12=1, var_1_13=4294967294, var_1_14=0, var_1_15=0, var_1_16=16, var_1_1=983/40, var_1_9=4294967301] [L71] CALL assume_abort_if_not(var_1_15 <= 126) VAL [\old(cond)=1, isInitial=1, last_1_var_1_1=983/40, last_1_var_1_9=4294967301, var_1_10=4294967300, var_1_11=4, var_1_12=1, var_1_13=4294967294, var_1_14=0, var_1_15=0, var_1_16=16, var_1_1=983/40, var_1_9=4294967301] [L20] COND FALSE !(!cond) [L71] RET assume_abort_if_not(var_1_15 <= 126) VAL [isInitial=1, last_1_var_1_1=983/40, last_1_var_1_9=4294967301, var_1_10=4294967300, var_1_11=4, var_1_12=1, var_1_13=4294967294, var_1_14=0, var_1_15=0, var_1_16=16, var_1_1=983/40, var_1_9=4294967301] [L72] var_1_16 = __VERIFIER_nondet_char() [L73] CALL assume_abort_if_not(var_1_16 >= 0) VAL [\old(cond)=1, isInitial=1, last_1_var_1_1=983/40, last_1_var_1_9=4294967301, var_1_10=4294967300, var_1_11=4, var_1_12=1, var_1_13=4294967294, var_1_14=0, var_1_15=0, var_1_16=126, var_1_1=983/40, var_1_9=4294967301] [L20] COND FALSE !(!cond) [L73] RET assume_abort_if_not(var_1_16 >= 0) VAL [isInitial=1, last_1_var_1_1=983/40, last_1_var_1_9=4294967301, var_1_10=4294967300, var_1_11=4, var_1_12=1, var_1_13=4294967294, var_1_14=0, var_1_15=0, var_1_16=126, var_1_1=983/40, var_1_9=4294967301] [L74] CALL assume_abort_if_not(var_1_16 <= 126) VAL [\old(cond)=1, isInitial=1, last_1_var_1_1=983/40, last_1_var_1_9=4294967301, var_1_10=4294967300, var_1_11=4, var_1_12=1, var_1_13=4294967294, var_1_14=0, var_1_15=0, var_1_16=126, var_1_1=983/40, var_1_9=4294967301] [L20] COND FALSE !(!cond) [L74] RET assume_abort_if_not(var_1_16 <= 126) VAL [isInitial=1, last_1_var_1_1=983/40, last_1_var_1_9=4294967301, var_1_10=4294967300, var_1_11=4, var_1_12=1, var_1_13=4294967294, var_1_14=0, var_1_15=0, var_1_16=126, var_1_1=983/40, var_1_9=4294967301] [L89] RET updateVariables() [L90] CALL step() [L37] COND FALSE !(((((last_1_var_1_9) > (last_1_var_1_9)) ? (last_1_var_1_9) : (last_1_var_1_9))) >= last_1_var_1_1) [L42] var_1_14 = var_1_15 [L44] COND TRUE \read(var_1_12) [L45] var_1_11 = ((((var_1_14) < (var_1_14)) ? (var_1_14) : (var_1_14))) [L49] var_1_9 = ((((var_1_10 - ((((10000.4f) < 0 ) ? -(10000.4f) : (10000.4f)))) < 0 ) ? -(var_1_10 - ((((10000.4f) < 0 ) ? -(10000.4f) : (10000.4f)))) : (var_1_10 - ((((10000.4f) < 0 ) ? -(10000.4f) : (10000.4f)))))) [L50] COND TRUE var_1_9 <= var_1_9 [L51] COND TRUE (var_1_11 + var_1_11) >= (var_1_14 + var_1_14) [L52] var_1_1 = var_1_8 [L90] RET step() [L91] CALL, EXPR property() [L81-L82] return ((((var_1_9 <= var_1_9) ? (((var_1_11 + var_1_11) >= (var_1_14 + var_1_14)) ? (var_1_1 == ((double) var_1_8)) : 1) : (var_1_1 == ((double) var_1_8))) && (var_1_9 == ((float) ((((var_1_10 - ((((10000.4f) < 0 ) ? -(10000.4f) : (10000.4f)))) < 0 ) ? -(var_1_10 - ((((10000.4f) < 0 ) ? -(10000.4f) : (10000.4f)))) : (var_1_10 - ((((10000.4f) < 0 ) ? -(10000.4f) : (10000.4f))))))))) && (var_1_12 ? (var_1_11 == ((unsigned long int) ((((var_1_14) < (var_1_14)) ? (var_1_14) : (var_1_14))))) : (var_1_11 == ((unsigned long int) ((((var_1_14) > ((var_1_13 - (var_1_14 + 32u)))) ? (var_1_14) : ((var_1_13 - (var_1_14 + 32u))))))))) && ((((((last_1_var_1_9) > (last_1_var_1_9)) ? (last_1_var_1_9) : (last_1_var_1_9))) >= last_1_var_1_1) ? (var_1_12 ? (var_1_14 == ((signed char) (var_1_15 - var_1_16))) : 1) : (var_1_14 == ((signed char) var_1_15))) ; [L91] RET, EXPR property() [L91] CALL __VERIFIER_assert(property()) [L19] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, isInitial=1, last_1_var_1_1=983/40, last_1_var_1_9=4294967301, var_1_10=4294967300, var_1_11=0, var_1_12=1, var_1_13=4294967294, var_1_14=0, var_1_15=0, var_1_16=126, var_1_1=983/40, var_1_8=983/40, var_1_9=4294967299] [L19] reach_error() VAL [\old(cond)=0, cond=0, isInitial=1, last_1_var_1_1=983/40, last_1_var_1_9=4294967301, var_1_10=4294967300, var_1_11=0, var_1_12=1, var_1_13=4294967294, var_1_14=0, var_1_15=0, var_1_16=126, var_1_1=983/40, var_1_8=983/40, var_1_9=4294967299] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 1, TraceHistogramMax: 10, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-19 05:12:55,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-47.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash adf480f71c98f97b1e3553d7ccd07596f803ed516785c8ed007d232ae0455bf0 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:12:58,154 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:12:58,300 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-11-19 05:12:58,309 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:12:58,310 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:12:58,353 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:12:58,354 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:12:58,355 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:12:58,356 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:12:58,361 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:12:58,361 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:12:58,362 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:12:58,362 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:12:58,364 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:12:58,364 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:12:58,365 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:12:58,368 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:12:58,369 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:12:58,369 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:12:58,370 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:12:58,371 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:12:58,371 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:12:58,372 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:12:58,372 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:12:58,372 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 05:12:58,373 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-19 05:12:58,373 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-19 05:12:58,373 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:12:58,374 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:12:58,374 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:12:58,376 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:12:58,376 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 05:12:58,376 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:12:58,377 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:12:58,377 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:12:58,377 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:12:58,377 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:12:58,378 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-19 05:12:58,378 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-19 05:12:58,379 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:12:58,379 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:12:58,379 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:12:58,380 INFO L153 SettingsManager]: * Logic for external solver=AUFBV 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_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adf480f71c98f97b1e3553d7ccd07596f803ed516785c8ed007d232ae0455bf0 [2023-11-19 05:12:58,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:12:58,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:12:58,845 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:12:58,846 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:12:58,847 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:12:58,849 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-47.i [2023-11-19 05:13:02,006 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:13:02,336 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:13:02,338 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-47.i [2023-11-19 05:13:02,351 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/data/9b90ac897/c8231bc0fbdf4ce28b4a29248d9707da/FLAG7427bc344 [2023-11-19 05:13:02,376 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/data/9b90ac897/c8231bc0fbdf4ce28b4a29248d9707da [2023-11-19 05:13:02,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:13:02,385 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:13:02,388 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:13:02,388 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:13:02,394 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:13:02,395 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:13:02" (1/1) ... [2023-11-19 05:13:02,396 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10394e21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:02, skipping insertion in model container [2023-11-19 05:13:02,396 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:13:02" (1/1) ... [2023-11-19 05:13:02,438 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:13:02,650 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_d533bf52-1820-42a3-bf9d-de0dacc03d78/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-47.i[915,928] [2023-11-19 05:13:02,728 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:13:02,753 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:13:02,775 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_d533bf52-1820-42a3-bf9d-de0dacc03d78/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-47.i[915,928] [2023-11-19 05:13:02,801 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:13:02,819 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:13:02,819 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:02 WrapperNode [2023-11-19 05:13:02,820 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:13:02,821 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:13:02,821 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:13:02,821 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:13:02,828 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:02" (1/1) ... [2023-11-19 05:13:02,841 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:02" (1/1) ... [2023-11-19 05:13:02,870 INFO L138 Inliner]: procedures = 27, calls = 23, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 88 [2023-11-19 05:13:02,871 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:13:02,871 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:13:02,872 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:13:02,872 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:13:02,882 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:02" (1/1) ... [2023-11-19 05:13:02,883 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:02" (1/1) ... [2023-11-19 05:13:02,891 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:02" (1/1) ... [2023-11-19 05:13:02,893 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:02" (1/1) ... [2023-11-19 05:13:02,903 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:02" (1/1) ... [2023-11-19 05:13:02,921 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:02" (1/1) ... [2023-11-19 05:13:02,924 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:02" (1/1) ... [2023-11-19 05:13:02,933 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:02" (1/1) ... [2023-11-19 05:13:02,936 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:13:02,937 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:13:02,938 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:13:02,938 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:13:02,939 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:02" (1/1) ... [2023-11-19 05:13:02,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:13:02,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:13:02,979 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:13:02,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:13:03,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:13:03,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-19 05:13:03,020 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 05:13:03,020 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 05:13:03,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:13:03,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:13:03,097 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:13:03,100 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:13:04,093 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:13:04,103 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:13:04,103 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 05:13:04,106 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:13:04 BoogieIcfgContainer [2023-11-19 05:13:04,106 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:13:04,108 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:13:04,108 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:13:04,112 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:13:04,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:13:02" (1/3) ... [2023-11-19 05:13:04,113 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6021ffeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:13:04, skipping insertion in model container [2023-11-19 05:13:04,113 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:02" (2/3) ... [2023-11-19 05:13:04,114 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6021ffeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:13:04, skipping insertion in model container [2023-11-19 05:13:04,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:13:04" (3/3) ... [2023-11-19 05:13:04,115 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_25-while_file-47.i [2023-11-19 05:13:04,138 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:13:04,139 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:13:04,208 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:13:04,215 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=FINITE_AUTOMATA, 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;@3a126f34, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:13:04,216 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:13:04,223 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 29 states have internal predecessors, (38), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-19 05:13:04,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-19 05:13:04,237 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:13:04,239 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:13:04,242 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:13:04,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:13:04,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1342335269, now seen corresponding path program 1 times [2023-11-19 05:13:04,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 05:13:04,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647113398] [2023-11-19 05:13:04,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:04,262 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 05:13:04,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 05:13:04,265 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 05:13:04,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-19 05:13:04,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:04,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 05:13:04,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:13:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-11-19 05:13:04,641 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:13:04,642 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 05:13:04,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647113398] [2023-11-19 05:13:04,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647113398] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:13:04,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:13:04,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:13:04,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469633508] [2023-11-19 05:13:04,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:13:04,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 05:13:04,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 05:13:04,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 05:13:04,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:13:04,732 INFO L87 Difference]: Start difference. First operand has 41 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 29 states have internal predecessors, (38), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 1 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2023-11-19 05:13:04,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:13:04,766 INFO L93 Difference]: Finished difference Result 75 states and 120 transitions. [2023-11-19 05:13:04,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 05:13:04,768 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 1 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 69 [2023-11-19 05:13:04,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:13:04,775 INFO L225 Difference]: With dead ends: 75 [2023-11-19 05:13:04,776 INFO L226 Difference]: Without dead ends: 37 [2023-11-19 05:13:04,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:13:04,784 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:13:04,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:13:04,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-19 05:13:04,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-11-19 05:13:04,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-19 05:13:04,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2023-11-19 05:13:04,830 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 69 [2023-11-19 05:13:04,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:13:04,831 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2023-11-19 05:13:04,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 1 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2023-11-19 05:13:04,831 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2023-11-19 05:13:04,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-19 05:13:04,835 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:13:04,836 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:13:04,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:13:05,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 05:13:05,044 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:13:05,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:13:05,045 INFO L85 PathProgramCache]: Analyzing trace with hash 645508055, now seen corresponding path program 1 times [2023-11-19 05:13:05,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 05:13:05,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334234398] [2023-11-19 05:13:05,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:05,047 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 05:13:05,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 05:13:05,049 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-19 05:13:05,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-19 05:13:05,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:05,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 05:13:05,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:13:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 43 proven. 24 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-11-19 05:13:10,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:13:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-19 05:13:23,511 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 05:13:23,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334234398] [2023-11-19 05:13:23,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334234398] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:13:23,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [148455122] [2023-11-19 05:13:23,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:23,513 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-19 05:13:23,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/cvc4 [2023-11-19 05:13:23,522 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-19 05:13:23,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2023-11-19 05:13:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:24,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 05:13:24,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:13:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 43 proven. 24 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-11-19 05:13:27,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:13:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-19 05:13:35,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [148455122] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:13:35,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485282714] [2023-11-19 05:13:35,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:35,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:13:35,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:13:35,340 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:13:35,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d533bf52-1820-42a3-bf9d-de0dacc03d78/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:13:35,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:35,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 05:13:35,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:13:39,762 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 43 proven. 24 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-11-19 05:13:39,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:13:47,342 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-19 05:13:47,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485282714] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:13:47,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-19 05:13:47,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 7, 6] total 12 [2023-11-19 05:13:47,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010287748] [2023-11-19 05:13:47,344 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-19 05:13:47,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 05:13:47,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 05:13:47,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 05:13:47,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-19 05:13:47,349 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 4 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20)