./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-61.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_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-61.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91 --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 361ad7309330d0980d27cf62f0ef032c1e20901880e67356d6799ee9da9467a8 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:49:44,426 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:49:44,556 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:49:44,562 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:49:44,563 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:49:44,590 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:49:44,591 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:49:44,592 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:49:44,593 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:49:44,593 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:49:44,594 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:49:44,594 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:49:44,595 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:49:44,596 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:49:44,596 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:49:44,597 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:49:44,597 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:49:44,598 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:49:44,599 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:49:44,599 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:49:44,600 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:49:44,609 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:49:44,609 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:49:44,611 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:49:44,612 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:49:44,612 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:49:44,613 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:49:44,613 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:49:44,614 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:49:44,614 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:49:44,615 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:49:44,616 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:49:44,617 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:49:44,617 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:49:44,617 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:49:44,617 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:49:44,618 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:49:44,618 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:49:44,618 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:49:44,619 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:49:44,619 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:49:44,619 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:49:44,620 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:49:44,620 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:49:44,620 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:49:44,620 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:49:44,620 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:49:44,621 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_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 361ad7309330d0980d27cf62f0ef032c1e20901880e67356d6799ee9da9467a8 [2023-11-24 23:49:44,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:49:44,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:49:44,932 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:49:44,934 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:49:44,935 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:49:44,936 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-61.i [2023-11-24 23:49:48,695 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:49:49,011 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:49:49,012 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-61.i [2023-11-24 23:49:49,023 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/data/435d80f79/ba21650ec8fb4279b183eabea12523ca/FLAG03bbd8fab [2023-11-24 23:49:49,040 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/data/435d80f79/ba21650ec8fb4279b183eabea12523ca [2023-11-24 23:49:49,044 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:49:49,046 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:49:49,048 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:49:49,048 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:49:49,054 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:49:49,055 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:49:49" (1/1) ... [2023-11-24 23:49:49,057 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7921f569 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:49, skipping insertion in model container [2023-11-24 23:49:49,057 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:49:49" (1/1) ... [2023-11-24 23:49:49,089 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:49:49,263 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_04ce933c-31fb-43b7-b747-ffd13889c73d/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-61.i[915,928] [2023-11-24 23:49:49,318 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:49:49,332 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:49:49,349 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_04ce933c-31fb-43b7-b747-ffd13889c73d/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-61.i[915,928] [2023-11-24 23:49:49,375 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:49:49,395 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:49:49,396 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:49 WrapperNode [2023-11-24 23:49:49,396 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:49:49,398 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:49:49,398 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:49:49,398 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:49:49,407 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:49" (1/1) ... [2023-11-24 23:49:49,418 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:49" (1/1) ... [2023-11-24 23:49:49,469 INFO L138 Inliner]: procedures = 26, calls = 25, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 107 [2023-11-24 23:49:49,470 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:49:49,471 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:49:49,471 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:49:49,471 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:49:49,483 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:49" (1/1) ... [2023-11-24 23:49:49,483 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:49" (1/1) ... [2023-11-24 23:49:49,487 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:49" (1/1) ... [2023-11-24 23:49:49,488 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:49" (1/1) ... [2023-11-24 23:49:49,506 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:49" (1/1) ... [2023-11-24 23:49:49,527 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:49" (1/1) ... [2023-11-24 23:49:49,530 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:49" (1/1) ... [2023-11-24 23:49:49,533 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:49" (1/1) ... [2023-11-24 23:49:49,538 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:49:49,541 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:49:49,541 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:49:49,541 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:49:49,544 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:49" (1/1) ... [2023-11-24 23:49:49,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:49:49,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:49:49,586 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:49:49,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:49:49,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:49:49,629 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-24 23:49:49,629 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-24 23:49:49,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:49:49,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:49:49,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:49:49,747 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:49:49,750 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:49:50,177 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:49:50,499 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:49:50,504 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 23:49:50,507 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:49:50 BoogieIcfgContainer [2023-11-24 23:49:50,507 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:49:50,511 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:49:50,512 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:49:50,516 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:49:50,516 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:49:49" (1/3) ... [2023-11-24 23:49:50,518 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f61d74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:49:50, skipping insertion in model container [2023-11-24 23:49:50,519 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:49" (2/3) ... [2023-11-24 23:49:50,522 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f61d74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:49:50, skipping insertion in model container [2023-11-24 23:49:50,522 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:49:50" (3/3) ... [2023-11-24 23:49:50,524 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_25-while_file-61.i [2023-11-24 23:49:50,543 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:49:50,543 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:49:50,629 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:49:50,638 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;@2fb40692, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:49:50,639 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:49:50,645 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-24 23:49:50,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-24 23:49:50,655 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:50,656 INFO L195 NwaCegarLoop]: trace histogram [12, 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] [2023-11-24 23:49:50,656 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:49:50,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:50,662 INFO L85 PathProgramCache]: Analyzing trace with hash 183663600, now seen corresponding path program 1 times [2023-11-24 23:49:50,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:50,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153721343] [2023-11-24 23:49:50,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:50,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:51,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 23:49:51,102 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 23:49:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 23:49:51,341 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-24 23:49:51,343 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 23:49:51,344 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-24 23:49:51,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:49:51,353 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-24 23:49:51,358 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-24 23:49:51,409 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 11:49:51 BoogieIcfgContainer [2023-11-24 23:49:51,409 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-24 23:49:51,410 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-24 23:49:51,411 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-24 23:49:51,411 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-24 23:49:51,412 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:49:50" (3/4) ... [2023-11-24 23:49:51,414 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-24 23:49:51,416 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-24 23:49:51,417 INFO L158 Benchmark]: Toolchain (without parser) took 2371.44ms. Allocated memory is still 167.8MB. Free memory was 122.1MB in the beginning and 98.0MB in the end (delta: 24.2MB). Peak memory consumption was 22.8MB. Max. memory is 16.1GB. [2023-11-24 23:49:51,418 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 123.7MB. Free memory is still 67.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 23:49:51,419 INFO L158 Benchmark]: CACSL2BoogieTranslator took 349.22ms. Allocated memory is still 167.8MB. Free memory was 122.1MB in the beginning and 110.3MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-24 23:49:51,420 INFO L158 Benchmark]: Boogie Procedure Inliner took 72.25ms. Allocated memory is still 167.8MB. Free memory was 110.3MB in the beginning and 106.8MB in the end (delta: 3.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-24 23:49:51,420 INFO L158 Benchmark]: Boogie Preprocessor took 68.87ms. Allocated memory is still 167.8MB. Free memory was 106.8MB in the beginning and 105.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 23:49:51,421 INFO L158 Benchmark]: RCFGBuilder took 966.60ms. Allocated memory is still 167.8MB. Free memory was 105.4MB in the beginning and 132.5MB in the end (delta: -27.1MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2023-11-24 23:49:51,422 INFO L158 Benchmark]: TraceAbstraction took 898.19ms. Allocated memory is still 167.8MB. Free memory was 131.5MB in the beginning and 98.0MB in the end (delta: 33.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2023-11-24 23:49:51,423 INFO L158 Benchmark]: Witness Printer took 5.72ms. Allocated memory is still 167.8MB. Free memory is still 98.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 23:49:51,427 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 123.7MB. Free memory is still 67.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 349.22ms. Allocated memory is still 167.8MB. Free memory was 122.1MB in the beginning and 110.3MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 72.25ms. Allocated memory is still 167.8MB. Free memory was 110.3MB in the beginning and 106.8MB in the end (delta: 3.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 68.87ms. Allocated memory is still 167.8MB. Free memory was 106.8MB in the beginning and 105.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 966.60ms. Allocated memory is still 167.8MB. Free memory was 105.4MB in the beginning and 132.5MB in the end (delta: -27.1MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * TraceAbstraction took 898.19ms. Allocated memory is still 167.8MB. Free memory was 131.5MB in the beginning and 98.0MB in the end (delta: 33.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Witness Printer took 5.72ms. Allocated memory is still 167.8MB. Free memory is still 98.0MB. 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 35, overapproximation of shiftLeft at line 53. Possible FailurePath: [L21] unsigned char isInitial = 0; [L22] unsigned char var_1_1 = 0; [L23] float var_1_2 = 128.6; [L24] float var_1_3 = 49.4; [L25] unsigned char var_1_4 = 0; [L26] unsigned char var_1_5 = 0; [L27] unsigned char var_1_6 = 0; [L28] unsigned char var_1_7 = 8; [L29] unsigned char var_1_8 = 128; [L30] unsigned char var_1_9 = 64; [L31] signed short int var_1_10 = 5; [L88] isInitial = 1 [L89] FCALL initially() [L90] COND TRUE 1 [L91] FCALL updateLastVariables() [L92] CALL updateVariables() [L61] var_1_2 = __VERIFIER_nondet_float() [L62] CALL assume_abort_if_not((var_1_2 >= -922337.2036854776000e+13F && var_1_2 <= -1.0e-20F) || (var_1_2 <= 9223372.036854776000e+12F && var_1_2 >= 1.0e-20F )) VAL [\old(cond)=1, isInitial=1, var_1_10=5, var_1_1=0, var_1_3=247/5, var_1_4=0, var_1_5=0, var_1_6=0, var_1_7=8, var_1_8=128, var_1_9=64] [L20] COND FALSE !(!cond) [L62] RET assume_abort_if_not((var_1_2 >= -922337.2036854776000e+13F && var_1_2 <= -1.0e-20F) || (var_1_2 <= 9223372.036854776000e+12F && var_1_2 >= 1.0e-20F )) VAL [isInitial=1, var_1_10=5, var_1_1=0, var_1_3=247/5, var_1_4=0, var_1_5=0, var_1_6=0, var_1_7=8, var_1_8=128, var_1_9=64] [L63] var_1_3 = __VERIFIER_nondet_float() [L64] CALL assume_abort_if_not((var_1_3 >= -922337.2036854776000e+13F && var_1_3 <= -1.0e-20F) || (var_1_3 <= 9223372.036854776000e+12F && var_1_3 >= 1.0e-20F )) VAL [\old(cond)=1, isInitial=1, var_1_10=5, var_1_1=0, var_1_4=0, var_1_5=0, var_1_6=0, var_1_7=8, var_1_8=128, var_1_9=64] [L20] COND FALSE !(!cond) [L64] RET assume_abort_if_not((var_1_3 >= -922337.2036854776000e+13F && var_1_3 <= -1.0e-20F) || (var_1_3 <= 9223372.036854776000e+12F && var_1_3 >= 1.0e-20F )) VAL [isInitial=1, var_1_10=5, var_1_1=0, var_1_4=0, var_1_5=0, var_1_6=0, var_1_7=8, var_1_8=128, var_1_9=64] [L65] var_1_4 = __VERIFIER_nondet_uchar() [L66] CALL assume_abort_if_not(var_1_4 >= 0) VAL [\old(cond)=1, isInitial=1, var_1_10=5, var_1_1=0, var_1_5=0, var_1_6=0, var_1_7=8, var_1_8=128, var_1_9=64] [L20] COND FALSE !(!cond) [L66] RET assume_abort_if_not(var_1_4 >= 0) VAL [isInitial=1, var_1_10=5, var_1_1=0, var_1_5=0, var_1_6=0, var_1_7=8, var_1_8=128, var_1_9=64] [L67] CALL assume_abort_if_not(var_1_4 <= 0) VAL [\old(cond)=1, isInitial=1, var_1_10=5, var_1_1=0, var_1_4=0, var_1_5=0, var_1_6=0, var_1_7=8, var_1_8=128, var_1_9=64] [L20] COND FALSE !(!cond) [L67] RET assume_abort_if_not(var_1_4 <= 0) VAL [isInitial=1, var_1_10=5, var_1_1=0, var_1_4=0, var_1_5=0, var_1_6=0, var_1_7=8, var_1_8=128, var_1_9=64] [L68] var_1_5 = __VERIFIER_nondet_uchar() [L69] CALL assume_abort_if_not(var_1_5 >= 0) VAL [\old(cond)=1, isInitial=1, var_1_10=5, var_1_1=0, var_1_4=0, var_1_6=0, var_1_7=8, var_1_8=128, var_1_9=64] [L20] COND FALSE !(!cond) [L69] RET assume_abort_if_not(var_1_5 >= 0) VAL [isInitial=1, var_1_10=5, var_1_1=0, var_1_4=0, var_1_6=0, var_1_7=8, var_1_8=128, var_1_9=64] [L70] CALL assume_abort_if_not(var_1_5 <= 0) VAL [\old(cond)=1, isInitial=1, var_1_10=5, var_1_1=0, var_1_4=0, var_1_5=0, var_1_6=0, var_1_7=8, var_1_8=128, var_1_9=64] [L20] COND FALSE !(!cond) [L70] RET assume_abort_if_not(var_1_5 <= 0) VAL [isInitial=1, var_1_10=5, var_1_1=0, var_1_4=0, var_1_5=0, var_1_6=0, var_1_7=8, var_1_8=128, var_1_9=64] [L71] var_1_6 = __VERIFIER_nondet_uchar() [L72] CALL assume_abort_if_not(var_1_6 >= 1) VAL [\old(cond)=1, isInitial=1, var_1_10=5, var_1_1=0, var_1_4=0, var_1_5=0, var_1_6=1, var_1_7=8, var_1_8=128, var_1_9=64] [L20] COND FALSE !(!cond) [L72] RET assume_abort_if_not(var_1_6 >= 1) VAL [isInitial=1, var_1_10=5, var_1_1=0, var_1_4=0, var_1_5=0, var_1_6=1, var_1_7=8, var_1_8=128, var_1_9=64] [L73] CALL assume_abort_if_not(var_1_6 <= 1) VAL [\old(cond)=1, isInitial=1, var_1_10=5, var_1_1=0, var_1_4=0, var_1_5=0, var_1_6=1, var_1_7=8, var_1_8=128, var_1_9=64] [L20] COND FALSE !(!cond) [L73] RET assume_abort_if_not(var_1_6 <= 1) VAL [isInitial=1, var_1_10=5, var_1_1=0, var_1_4=0, var_1_5=0, var_1_6=1, var_1_7=8, var_1_8=128, var_1_9=64] [L74] var_1_8 = __VERIFIER_nondet_uchar() [L75] CALL assume_abort_if_not(var_1_8 >= 127) VAL [\old(cond)=1, isInitial=1, var_1_10=5, var_1_1=0, var_1_4=0, var_1_5=0, var_1_6=1, var_1_7=8, var_1_8=254, var_1_9=64] [L20] COND FALSE !(!cond) [L75] RET assume_abort_if_not(var_1_8 >= 127) VAL [isInitial=1, var_1_10=5, var_1_1=0, var_1_4=0, var_1_5=0, var_1_6=1, var_1_7=8, var_1_8=254, var_1_9=64] [L76] CALL assume_abort_if_not(var_1_8 <= 254) VAL [\old(cond)=1, isInitial=1, var_1_10=5, var_1_1=0, var_1_4=0, var_1_5=0, var_1_6=1, var_1_7=8, var_1_8=254, var_1_9=64] [L20] COND FALSE !(!cond) [L76] RET assume_abort_if_not(var_1_8 <= 254) VAL [isInitial=1, var_1_10=5, var_1_1=0, var_1_4=0, var_1_5=0, var_1_6=1, var_1_7=8, var_1_8=254, var_1_9=64] [L77] var_1_9 = __VERIFIER_nondet_uchar() [L78] CALL assume_abort_if_not(var_1_9 >= 0) VAL [\old(cond)=1, isInitial=1, var_1_10=5, var_1_1=0, var_1_4=0, var_1_5=0, var_1_6=1, var_1_7=8, var_1_8=254] [L20] COND FALSE !(!cond) [L78] RET assume_abort_if_not(var_1_9 >= 0) VAL [isInitial=1, var_1_10=5, var_1_1=0, var_1_4=0, var_1_5=0, var_1_6=1, var_1_7=8, var_1_8=254] [L79] CALL assume_abort_if_not(var_1_9 <= 127) VAL [\old(cond)=1, isInitial=1, var_1_10=5, var_1_1=0, var_1_4=0, var_1_5=0, var_1_6=1, var_1_7=8, var_1_8=254, var_1_9=64] [L20] COND FALSE !(!cond) [L79] RET assume_abort_if_not(var_1_9 <= 127) VAL [isInitial=1, var_1_10=5, var_1_1=0, var_1_4=0, var_1_5=0, var_1_6=1, var_1_7=8, var_1_8=254, var_1_9=64] [L92] RET updateVariables() [L93] CALL step() [L35] COND TRUE var_1_2 < var_1_3 [L36] var_1_1 = (var_1_4 || var_1_5) [L44] COND TRUE \read(var_1_6) [L45] COND FALSE !(var_1_3 != 15.8f) [L48] var_1_7 = ((((var_1_8) > (var_1_9)) ? (var_1_8) : (var_1_9))) [L53] EXPR (var_1_9 / 32) << var_1_8 [L53] signed long int stepLocal_0 = (var_1_9 / 32) << var_1_8; [L54] COND FALSE !(! (var_1_3 < var_1_2)) [L93] RET step() [L94] CALL, EXPR property() [L84] EXPR (((var_1_2 < var_1_3) ? (var_1_1 == ((unsigned char) (var_1_4 || var_1_5))) : ((var_1_3 >= var_1_2) ? (var_1_1 == ((unsigned char) var_1_5)) : (var_1_1 == ((unsigned char) var_1_6)))) && (var_1_6 ? ((var_1_3 != 15.8f) ? (var_1_7 == ((unsigned char) (var_1_8 - var_1_9))) : (var_1_7 == ((unsigned char) ((((var_1_8) > (var_1_9)) ? (var_1_8) : (var_1_9)))))) : (var_1_7 == ((unsigned char) var_1_8)))) && ((! (var_1_3 < var_1_2)) ? ((((var_1_9 / 32) << var_1_8) == var_1_7) ? (var_1_10 == ((signed short int) (var_1_7 - var_1_8))) : 1) : 1) [L84] EXPR (! (var_1_3 < var_1_2)) ? ((((var_1_9 / 32) << var_1_8) == var_1_7) ? (var_1_10 == ((signed short int) (var_1_7 - var_1_8))) : 1) : 1 [L84] EXPR (var_1_9 / 32) << var_1_8 [L84] EXPR (! (var_1_3 < var_1_2)) ? ((((var_1_9 / 32) << var_1_8) == var_1_7) ? (var_1_10 == ((signed short int) (var_1_7 - var_1_8))) : 1) : 1 [L84] EXPR (((var_1_2 < var_1_3) ? (var_1_1 == ((unsigned char) (var_1_4 || var_1_5))) : ((var_1_3 >= var_1_2) ? (var_1_1 == ((unsigned char) var_1_5)) : (var_1_1 == ((unsigned char) var_1_6)))) && (var_1_6 ? ((var_1_3 != 15.8f) ? (var_1_7 == ((unsigned char) (var_1_8 - var_1_9))) : (var_1_7 == ((unsigned char) ((((var_1_8) > (var_1_9)) ? (var_1_8) : (var_1_9)))))) : (var_1_7 == ((unsigned char) var_1_8)))) && ((! (var_1_3 < var_1_2)) ? ((((var_1_9 / 32) << var_1_8) == var_1_7) ? (var_1_10 == ((signed short int) (var_1_7 - var_1_8))) : 1) : 1) [L84-L85] return (((var_1_2 < var_1_3) ? (var_1_1 == ((unsigned char) (var_1_4 || var_1_5))) : ((var_1_3 >= var_1_2) ? (var_1_1 == ((unsigned char) var_1_5)) : (var_1_1 == ((unsigned char) var_1_6)))) && (var_1_6 ? ((var_1_3 != 15.8f) ? (var_1_7 == ((unsigned char) (var_1_8 - var_1_9))) : (var_1_7 == ((unsigned char) ((((var_1_8) > (var_1_9)) ? (var_1_8) : (var_1_9)))))) : (var_1_7 == ((unsigned char) var_1_8)))) && ((! (var_1_3 < var_1_2)) ? ((((var_1_9 / 32) << var_1_8) == var_1_7) ? (var_1_10 == ((signed short int) (var_1_7 - var_1_8))) : 1) : 1) ; [L94] RET, EXPR property() [L94] CALL __VERIFIER_assert(property()) [L19] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, isInitial=1, var_1_10=5, var_1_1=0, var_1_4=0, var_1_5=0, var_1_6=1, var_1_7=254, var_1_8=254, var_1_9=64] [L19] reach_error() VAL [\old(cond)=0, cond=0, isInitial=1, var_1_10=5, var_1_1=0, var_1_4=0, var_1_5=0, var_1_6=1, var_1_7=254, var_1_8=254, var_1_9=64] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 1, TraceHistogramMax: 12, 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=28occurred 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, 47 NumberOfCodeBlocks, 47 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 [2023-11-24 23:49:51,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-61.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91 --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 361ad7309330d0980d27cf62f0ef032c1e20901880e67356d6799ee9da9467a8 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:49:54,315 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:49:54,446 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-11-24 23:49:54,454 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:49:54,455 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:49:54,509 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:49:54,509 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:49:54,510 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:49:54,511 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:49:54,516 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:49:54,516 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:49:54,517 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:49:54,517 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:49:54,519 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:49:54,520 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:49:54,520 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:49:54,521 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:49:54,522 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:49:54,522 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:49:54,523 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:49:54,524 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:49:54,525 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:49:54,525 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:49:54,525 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:49:54,526 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 23:49:54,526 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-24 23:49:54,527 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-24 23:49:54,527 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:49:54,528 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:49:54,528 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:49:54,530 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:49:54,530 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 23:49:54,530 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:49:54,531 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:49:54,531 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:49:54,531 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:49:54,532 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:49:54,532 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:49:54,532 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-24 23:49:54,533 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-24 23:49:54,534 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:49:54,534 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:49:54,534 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:49:54,534 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:49:54,535 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_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 361ad7309330d0980d27cf62f0ef032c1e20901880e67356d6799ee9da9467a8 [2023-11-24 23:49:54,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:49:54,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:49:54,985 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:49:54,986 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:49:54,987 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:49:54,988 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-61.i [2023-11-24 23:49:58,386 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:49:58,746 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:49:58,747 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-61.i [2023-11-24 23:49:58,757 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/data/1dca97a9f/d80c8a204cf940d994fceae92b819d57/FLAG148671801 [2023-11-24 23:49:58,772 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/data/1dca97a9f/d80c8a204cf940d994fceae92b819d57 [2023-11-24 23:49:58,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:49:58,777 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:49:58,779 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:49:58,779 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:49:58,789 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:49:58,790 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:49:58" (1/1) ... [2023-11-24 23:49:58,792 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eac4330 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:58, skipping insertion in model container [2023-11-24 23:49:58,792 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:49:58" (1/1) ... [2023-11-24 23:49:58,824 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:49:59,020 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_04ce933c-31fb-43b7-b747-ffd13889c73d/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-61.i[915,928] [2023-11-24 23:49:59,067 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:49:59,089 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:49:59,121 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_04ce933c-31fb-43b7-b747-ffd13889c73d/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-61.i[915,928] [2023-11-24 23:49:59,172 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:49:59,199 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:49:59,200 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:59 WrapperNode [2023-11-24 23:49:59,201 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:49:59,204 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:49:59,204 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:49:59,204 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:49:59,215 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:59" (1/1) ... [2023-11-24 23:49:59,247 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:59" (1/1) ... [2023-11-24 23:49:59,299 INFO L138 Inliner]: procedures = 27, calls = 25, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 91 [2023-11-24 23:49:59,299 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:49:59,300 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:49:59,301 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:49:59,301 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:49:59,315 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:59" (1/1) ... [2023-11-24 23:49:59,316 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:59" (1/1) ... [2023-11-24 23:49:59,331 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:59" (1/1) ... [2023-11-24 23:49:59,331 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:59" (1/1) ... [2023-11-24 23:49:59,351 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:59" (1/1) ... [2023-11-24 23:49:59,356 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:59" (1/1) ... [2023-11-24 23:49:59,360 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:59" (1/1) ... [2023-11-24 23:49:59,362 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:59" (1/1) ... [2023-11-24 23:49:59,367 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:49:59,368 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:49:59,369 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:49:59,369 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:49:59,370 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:59" (1/1) ... [2023-11-24 23:49:59,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:49:59,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:49:59,417 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:49:59,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:49:59,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:49:59,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-24 23:49:59,474 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-24 23:49:59,475 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-24 23:49:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:49:59,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:49:59,622 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:49:59,627 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:50:00,079 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:50:00,169 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:50:00,169 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 23:50:00,170 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:50:00 BoogieIcfgContainer [2023-11-24 23:50:00,170 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:50:00,175 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:50:00,175 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:50:00,179 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:50:00,179 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:49:58" (1/3) ... [2023-11-24 23:50:00,180 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@176bd590 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:50:00, skipping insertion in model container [2023-11-24 23:50:00,181 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:59" (2/3) ... [2023-11-24 23:50:00,183 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@176bd590 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:50:00, skipping insertion in model container [2023-11-24 23:50:00,184 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:50:00" (3/3) ... [2023-11-24 23:50:00,186 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_25-while_file-61.i [2023-11-24 23:50:00,209 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:50:00,209 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:50:00,284 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:50:00,293 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;@871d798, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:50:00,294 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:50:00,299 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-24 23:50:00,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-24 23:50:00,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:50:00,316 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:50:00,318 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:50:00,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:50:00,326 INFO L85 PathProgramCache]: Analyzing trace with hash 186350007, now seen corresponding path program 1 times [2023-11-24 23:50:00,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-24 23:50:00,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [205416821] [2023-11-24 23:50:00,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:00,345 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 [2023-11-24 23:50:00,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/mathsat [2023-11-24 23:50:00,352 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/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) [2023-11-24 23:50:00,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/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 [2023-11-24 23:50:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:00,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-24 23:50:00,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:50:00,675 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2023-11-24 23:50:00,677 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:50:00,678 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-24 23:50:00,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [205416821] [2023-11-24 23:50:00,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [205416821] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:50:00,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:50:00,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:50:00,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951588808] [2023-11-24 23:50:00,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:50:00,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 23:50:00,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-24 23:50:00,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 23:50:00,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 23:50:00,744 INFO L87 Difference]: Start difference. First operand has 39 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-24 23:50:00,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:50:00,847 INFO L93 Difference]: Finished difference Result 75 states and 128 transitions. [2023-11-24 23:50:00,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 23:50:00,851 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 76 [2023-11-24 23:50:00,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:50:00,861 INFO L225 Difference]: With dead ends: 75 [2023-11-24 23:50:00,862 INFO L226 Difference]: Without dead ends: 37 [2023-11-24 23:50:00,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 23:50:00,872 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:50:00,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:50:00,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-24 23:50:00,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-11-24 23:50:00,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-24 23:50:00,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 54 transitions. [2023-11-24 23:50:00,940 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 54 transitions. Word has length 76 [2023-11-24 23:50:00,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:50:00,941 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 54 transitions. [2023-11-24 23:50:00,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-24 23:50:00,942 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 54 transitions. [2023-11-24 23:50:00,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-24 23:50:00,950 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:50:00,951 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:50:00,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/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 [2023-11-24 23:50:01,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/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 [2023-11-24 23:50:01,158 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:50:01,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:50:01,159 INFO L85 PathProgramCache]: Analyzing trace with hash -224680717, now seen corresponding path program 1 times [2023-11-24 23:50:01,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-24 23:50:01,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366775869] [2023-11-24 23:50:01,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:01,161 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 [2023-11-24 23:50:01,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/mathsat [2023-11-24 23:50:01,164 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/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) [2023-11-24 23:50:01,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/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 [2023-11-24 23:50:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:01,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 23:50:01,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:50:01,545 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 143 proven. 15 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-11-24 23:50:01,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:50:01,703 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-11-24 23:50:01,703 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-24 23:50:01,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366775869] [2023-11-24 23:50:01,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366775869] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:50:01,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [934116281] [2023-11-24 23:50:01,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:01,705 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-24 23:50:01,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/cvc4 [2023-11-24 23:50:01,734 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-24 23:50:01,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2023-11-24 23:50:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:02,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:50:02,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:50:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 143 proven. 15 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-11-24 23:50:02,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:50:02,469 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-11-24 23:50:02,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [934116281] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:50:02,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325660623] [2023-11-24 23:50:02,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:02,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:50:02,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:50:02,476 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:50:02,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:50:02,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:02,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 23:50:02,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:50:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-24 23:50:03,136 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:50:03,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325660623] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:50:03,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-11-24 23:50:03,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 5, 5] total 9 [2023-11-24 23:50:03,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553399213] [2023-11-24 23:50:03,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:50:03,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:50:03,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-24 23:50:03,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:50:03,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:50:03,140 INFO L87 Difference]: Start difference. First operand 37 states and 54 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-24 23:50:03,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:50:03,405 INFO L93 Difference]: Finished difference Result 93 states and 133 transitions. [2023-11-24 23:50:03,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:50:03,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 76 [2023-11-24 23:50:03,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:50:03,409 INFO L225 Difference]: With dead ends: 93 [2023-11-24 23:50:03,409 INFO L226 Difference]: Without dead ends: 57 [2023-11-24 23:50:03,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 366 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:50:03,411 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 20 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:50:03,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 106 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:50:03,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-24 23:50:03,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2023-11-24 23:50:03,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-24 23:50:03,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 60 transitions. [2023-11-24 23:50:03,422 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 60 transitions. Word has length 76 [2023-11-24 23:50:03,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:50:03,424 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 60 transitions. [2023-11-24 23:50:03,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-24 23:50:03,424 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 60 transitions. [2023-11-24 23:50:03,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-24 23:50:03,426 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:50:03,426 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:50:03,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2023-11-24 23:50:03,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/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)] Forceful destruction successful, exit code 0 [2023-11-24 23:50:03,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 23:50:04,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:50:04,031 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:50:04,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:50:04,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1615558732, now seen corresponding path program 1 times [2023-11-24 23:50:04,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-24 23:50:04,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [607293792] [2023-11-24 23:50:04,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:04,032 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 [2023-11-24 23:50:04,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/mathsat [2023-11-24 23:50:04,034 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/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) [2023-11-24 23:50:04,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-24 23:50:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:04,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 23:50:04,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:50:04,301 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 143 proven. 15 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-11-24 23:50:04,301 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:50:04,434 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-11-24 23:50:04,435 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-24 23:50:04,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [607293792] [2023-11-24 23:50:04,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [607293792] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:50:04,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1250525373] [2023-11-24 23:50:04,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:04,436 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-24 23:50:04,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/cvc4 [2023-11-24 23:50:04,441 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-24 23:50:04,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2023-11-24 23:50:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:04,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:50:04,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:50:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 143 proven. 15 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-11-24 23:50:04,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:50:05,135 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-11-24 23:50:05,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1250525373] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:50:05,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274155766] [2023-11-24 23:50:05,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:05,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:50:05,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:50:05,145 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:50:05,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 23:50:05,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:05,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 23:50:05,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:50:05,312 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 143 proven. 15 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-11-24 23:50:05,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:50:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-11-24 23:50:05,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274155766] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:50:05,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-24 23:50:05,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 7 [2023-11-24 23:50:05,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222212273] [2023-11-24 23:50:05,422 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-24 23:50:05,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:50:05,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-24 23:50:05,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:50:05,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:50:05,425 INFO L87 Difference]: Start difference. First operand 41 states and 60 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-24 23:50:05,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:50:05,768 INFO L93 Difference]: Finished difference Result 100 states and 143 transitions. [2023-11-24 23:50:05,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:50:05,769 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 77 [2023-11-24 23:50:05,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:50:05,771 INFO L225 Difference]: With dead ends: 100 [2023-11-24 23:50:05,771 INFO L226 Difference]: Without dead ends: 60 [2023-11-24 23:50:05,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 448 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-24 23:50:05,774 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 70 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:50:05,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 98 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:50:05,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-24 23:50:05,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2023-11-24 23:50:05,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 35 states have internal predecessors, (41), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-24 23:50:05,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 77 transitions. [2023-11-24 23:50:05,820 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 77 transitions. Word has length 77 [2023-11-24 23:50:05,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:50:05,821 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 77 transitions. [2023-11-24 23:50:05,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-24 23:50:05,822 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 77 transitions. [2023-11-24 23:50:05,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-24 23:50:05,826 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:50:05,826 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:50:05,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-24 23:50:06,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2023-11-24 23:50:06,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 23:50:06,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:50:06,428 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:50:06,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:50:06,429 INFO L85 PathProgramCache]: Analyzing trace with hash -228002308, now seen corresponding path program 1 times [2023-11-24 23:50:06,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-24 23:50:06,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057675610] [2023-11-24 23:50:06,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:06,430 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 [2023-11-24 23:50:06,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/mathsat [2023-11-24 23:50:06,431 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/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) [2023-11-24 23:50:06,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04ce933c-31fb-43b7-b747-ffd13889c73d/bin/utaipan-verify-SwPr7d2a91/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-24 23:50:06,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:06,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-24 23:50:06,596 INFO L285 TraceCheckSpWp]: Computing forward predicates...