./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_codestructure_normal_file-68.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_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/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_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_codestructure_normal_file-68.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/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_66b7d104-82af-42ba-8823-4ce388d8bd42/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 bdb04820b0552f240cac64f9b4eeb39d6636c8d16d50737ca938c89bab3fc009 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:56:14,277 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:56:14,395 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:56:14,402 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:56:14,403 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:56:14,440 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:56:14,441 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:56:14,442 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:56:14,443 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:56:14,447 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:56:14,448 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:56:14,449 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:56:14,450 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:56:14,451 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:56:14,452 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:56:14,452 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:56:14,452 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:56:14,453 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:56:14,453 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:56:14,454 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:56:14,454 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:56:14,455 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:56:14,456 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:56:14,456 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:56:14,457 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:56:14,457 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:56:14,458 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:56:14,458 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:56:14,458 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:56:14,459 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:56:14,460 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:56:14,460 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:56:14,460 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:56:14,460 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:56:14,461 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:56:14,461 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:56:14,461 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:56:14,461 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:56:14,461 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:56:14,461 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:56:14,462 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:56:14,464 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:56:14,465 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:56:14,465 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:56:14,465 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:56:14,466 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:56:14,466 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:56:14,466 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_66b7d104-82af-42ba-8823-4ce388d8bd42/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bdb04820b0552f240cac64f9b4eeb39d6636c8d16d50737ca938c89bab3fc009 [2023-11-24 23:56:14,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:56:14,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:56:14,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:56:14,804 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:56:14,804 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:56:14,806 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/hardness-nfm22/hardness_codestructure_normal_file-68.i [2023-11-24 23:56:17,889 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:56:18,119 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:56:18,122 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/sv-benchmarks/c/hardness-nfm22/hardness_codestructure_normal_file-68.i [2023-11-24 23:56:18,135 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/data/8c564edee/2ba6423868294ea7838ccdf9717588e5/FLAG4383c313a [2023-11-24 23:56:18,154 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/data/8c564edee/2ba6423868294ea7838ccdf9717588e5 [2023-11-24 23:56:18,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:56:18,162 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:56:18,166 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:56:18,166 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:56:18,172 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:56:18,173 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:56:18" (1/1) ... [2023-11-24 23:56:18,174 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66756b60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:18, skipping insertion in model container [2023-11-24 23:56:18,174 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:56:18" (1/1) ... [2023-11-24 23:56:18,222 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:56:18,424 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_66b7d104-82af-42ba-8823-4ce388d8bd42/sv-benchmarks/c/hardness-nfm22/hardness_codestructure_normal_file-68.i[913,926] [2023-11-24 23:56:18,493 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:56:18,505 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:56:18,519 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_66b7d104-82af-42ba-8823-4ce388d8bd42/sv-benchmarks/c/hardness-nfm22/hardness_codestructure_normal_file-68.i[913,926] [2023-11-24 23:56:18,550 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:56:18,568 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:56:18,569 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:18 WrapperNode [2023-11-24 23:56:18,570 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:56:18,571 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:56:18,571 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:56:18,571 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:56:18,579 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:18" (1/1) ... [2023-11-24 23:56:18,591 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:18" (1/1) ... [2023-11-24 23:56:18,643 INFO L138 Inliner]: procedures = 26, calls = 29, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 143 [2023-11-24 23:56:18,644 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:56:18,645 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:56:18,645 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:56:18,645 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:56:18,656 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:18" (1/1) ... [2023-11-24 23:56:18,656 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:18" (1/1) ... [2023-11-24 23:56:18,660 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:18" (1/1) ... [2023-11-24 23:56:18,661 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:18" (1/1) ... [2023-11-24 23:56:18,674 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:18" (1/1) ... [2023-11-24 23:56:18,692 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:18" (1/1) ... [2023-11-24 23:56:18,699 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:18" (1/1) ... [2023-11-24 23:56:18,715 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:18" (1/1) ... [2023-11-24 23:56:18,721 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:56:18,725 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:56:18,725 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:56:18,726 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:56:18,727 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:18" (1/1) ... [2023-11-24 23:56:18,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:56:18,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:56:18,771 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:56:18,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:56:18,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:56:18,815 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-24 23:56:18,815 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-24 23:56:18,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:56:18,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:56:18,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:56:18,899 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:56:18,902 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:56:19,446 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:56:19,664 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:56:19,664 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 23:56:19,666 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:56:19 BoogieIcfgContainer [2023-11-24 23:56:19,666 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:56:19,669 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:56:19,669 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:56:19,674 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:56:19,674 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:56:18" (1/3) ... [2023-11-24 23:56:19,676 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e84908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:56:19, skipping insertion in model container [2023-11-24 23:56:19,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:18" (2/3) ... [2023-11-24 23:56:19,678 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e84908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:56:19, skipping insertion in model container [2023-11-24 23:56:19,678 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:56:19" (3/3) ... [2023-11-24 23:56:19,680 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_codestructure_normal_file-68.i [2023-11-24 23:56:19,702 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:56:19,703 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:56:19,760 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:56:19,767 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;@4b45b2e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:56:19,768 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:56:19,772 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-24 23:56:19,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-24 23:56:19,783 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:19,784 INFO L195 NwaCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:56:19,785 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:19,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:19,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1052562644, now seen corresponding path program 1 times [2023-11-24 23:56:19,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:19,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396385739] [2023-11-24 23:56:19,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:19,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:19,941 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:56:19,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1578707364] [2023-11-24 23:56:19,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:19,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:56:19,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:56:19,946 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:56:19,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:56:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 23:56:20,137 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 23:56:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 23:56:20,278 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-24 23:56:20,281 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 23:56:20,282 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-24 23:56:20,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:56:20,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-24 23:56:20,497 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-24 23:56:20,501 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-24 23:56:20,601 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 11:56:20 BoogieIcfgContainer [2023-11-24 23:56:20,601 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-24 23:56:20,602 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-24 23:56:20,602 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-24 23:56:20,602 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-24 23:56:20,603 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:56:19" (3/4) ... [2023-11-24 23:56:20,615 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-24 23:56:20,616 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-24 23:56:20,618 INFO L158 Benchmark]: Toolchain (without parser) took 2455.12ms. Allocated memory was 138.4MB in the beginning and 188.7MB in the end (delta: 50.3MB). Free memory was 93.3MB in the beginning and 99.5MB in the end (delta: -6.2MB). Peak memory consumption was 47.2MB. Max. memory is 16.1GB. [2023-11-24 23:56:20,618 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 104.9MB. Free memory is still 58.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 23:56:20,619 INFO L158 Benchmark]: CACSL2BoogieTranslator took 403.89ms. Allocated memory is still 138.4MB. Free memory was 92.9MB in the beginning and 79.2MB in the end (delta: 13.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-24 23:56:20,620 INFO L158 Benchmark]: Boogie Procedure Inliner took 73.30ms. Allocated memory is still 138.4MB. Free memory was 79.2MB in the beginning and 75.4MB in the end (delta: 3.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-24 23:56:20,620 INFO L158 Benchmark]: Boogie Preprocessor took 79.75ms. Allocated memory is still 138.4MB. Free memory was 75.4MB in the beginning and 73.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 23:56:20,621 INFO L158 Benchmark]: RCFGBuilder took 941.38ms. Allocated memory was 138.4MB in the beginning and 188.7MB in the end (delta: 50.3MB). Free memory was 73.2MB in the beginning and 133.1MB in the end (delta: -59.8MB). Peak memory consumption was 28.4MB. Max. memory is 16.1GB. [2023-11-24 23:56:20,622 INFO L158 Benchmark]: TraceAbstraction took 932.20ms. Allocated memory is still 188.7MB. Free memory was 132.0MB in the beginning and 100.5MB in the end (delta: 31.5MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2023-11-24 23:56:20,623 INFO L158 Benchmark]: Witness Printer took 14.53ms. Allocated memory is still 188.7MB. Free memory was 100.5MB in the beginning and 99.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 23:56:20,626 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 104.9MB. Free memory is still 58.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 403.89ms. Allocated memory is still 138.4MB. Free memory was 92.9MB in the beginning and 79.2MB in the end (delta: 13.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 73.30ms. Allocated memory is still 138.4MB. Free memory was 79.2MB in the beginning and 75.4MB in the end (delta: 3.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 79.75ms. Allocated memory is still 138.4MB. Free memory was 75.4MB in the beginning and 73.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 941.38ms. Allocated memory was 138.4MB in the beginning and 188.7MB in the end (delta: 50.3MB). Free memory was 73.2MB in the beginning and 133.1MB in the end (delta: -59.8MB). Peak memory consumption was 28.4MB. Max. memory is 16.1GB. * TraceAbstraction took 932.20ms. Allocated memory is still 188.7MB. Free memory was 132.0MB in the beginning and 100.5MB in the end (delta: 31.5MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * Witness Printer took 14.53ms. Allocated memory is still 188.7MB. Free memory was 100.5MB in the beginning and 99.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. 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 someBinaryDOUBLEComparisonOperation at line 60, overapproximation of someBinaryFLOATComparisonOperation at line 111, overapproximation of bitwiseOr at line 41. Possible FailurePath: [L21] unsigned char isInitial = 0; [L22] unsigned char var_1_1 = 1; [L23] unsigned char var_1_2 = 10; [L24] unsigned char var_1_3 = 25; [L25] unsigned char var_1_4 = 16; [L26] unsigned char var_1_5 = 0; [L27] unsigned char var_1_6 = 0; [L28] unsigned char var_1_7 = 1; [L29] unsigned char var_1_8 = 32; [L30] double var_1_9 = 4.6; [L31] double var_1_10 = 9.25; [L32] double var_1_11 = 1.25; [L33] unsigned char var_1_12 = 100; [L34] unsigned char var_1_13 = 64; [L35] unsigned char var_1_14 = 0; [L36] float var_1_15 = 7.5; [L37] signed long int var_1_16 = 0; [L115] isInitial = 1 [L116] FCALL initially() [L117] COND TRUE 1 [L118] FCALL updateLastVariables() [L119] CALL updateVariables() [L83] var_1_2 = __VERIFIER_nondet_uchar() [L84] CALL assume_abort_if_not(var_1_2 >= 0) VAL [\old(cond)=1, isInitial=1, var_1_10=37/4, var_1_11=5/4, var_1_12=100, var_1_13=64, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_3=25, var_1_4=16, var_1_5=0, var_1_6=0, var_1_7=1, var_1_8=32, var_1_9=23/5] [L20] COND FALSE !(!cond) [L84] RET assume_abort_if_not(var_1_2 >= 0) VAL [isInitial=1, var_1_10=37/4, var_1_11=5/4, var_1_12=100, var_1_13=64, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_3=25, var_1_4=16, var_1_5=0, var_1_6=0, var_1_7=1, var_1_8=32, var_1_9=23/5] [L85] CALL assume_abort_if_not(var_1_2 <= 255) VAL [\old(cond)=1, isInitial=1, var_1_10=37/4, var_1_11=5/4, var_1_12=100, var_1_13=64, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_3=25, var_1_4=16, var_1_5=0, var_1_6=0, var_1_7=1, var_1_8=32, var_1_9=23/5] [L20] COND FALSE !(!cond) [L85] RET assume_abort_if_not(var_1_2 <= 255) VAL [isInitial=1, var_1_10=37/4, var_1_11=5/4, var_1_12=100, var_1_13=64, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_3=25, var_1_4=16, var_1_5=0, var_1_6=0, var_1_7=1, var_1_8=32, var_1_9=23/5] [L86] var_1_3 = __VERIFIER_nondet_uchar() [L87] CALL assume_abort_if_not(var_1_3 >= 0) VAL [\old(cond)=1, isInitial=1, var_1_10=37/4, var_1_11=5/4, var_1_12=100, var_1_13=64, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_4=16, var_1_5=0, var_1_6=0, var_1_7=1, var_1_8=32, var_1_9=23/5] [L20] COND FALSE !(!cond) [L87] RET assume_abort_if_not(var_1_3 >= 0) VAL [isInitial=1, var_1_10=37/4, var_1_11=5/4, var_1_12=100, var_1_13=64, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_4=16, var_1_5=0, var_1_6=0, var_1_7=1, var_1_8=32, var_1_9=23/5] [L88] CALL assume_abort_if_not(var_1_3 <= 255) VAL [\old(cond)=1, isInitial=1, var_1_10=37/4, var_1_11=5/4, var_1_12=100, var_1_13=64, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_4=16, var_1_5=0, var_1_6=0, var_1_7=1, var_1_8=32, var_1_9=23/5] [L20] COND FALSE !(!cond) [L88] RET assume_abort_if_not(var_1_3 <= 255) VAL [isInitial=1, var_1_10=37/4, var_1_11=5/4, var_1_12=100, var_1_13=64, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_4=16, var_1_5=0, var_1_6=0, var_1_7=1, var_1_8=32, var_1_9=23/5] [L89] var_1_4 = __VERIFIER_nondet_uchar() [L90] CALL assume_abort_if_not(var_1_4 >= 0) VAL [\old(cond)=1, isInitial=1, var_1_10=37/4, var_1_11=5/4, var_1_12=100, var_1_13=64, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_5=0, var_1_6=0, var_1_7=1, var_1_8=32, var_1_9=23/5] [L20] COND FALSE !(!cond) [L90] RET assume_abort_if_not(var_1_4 >= 0) VAL [isInitial=1, var_1_10=37/4, var_1_11=5/4, var_1_12=100, var_1_13=64, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_5=0, var_1_6=0, var_1_7=1, var_1_8=32, var_1_9=23/5] [L91] CALL assume_abort_if_not(var_1_4 <= 255) VAL [\old(cond)=1, isInitial=1, var_1_10=37/4, var_1_11=5/4, var_1_12=100, var_1_13=64, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_5=0, var_1_6=0, var_1_7=1, var_1_8=32, var_1_9=23/5] [L20] COND FALSE !(!cond) [L91] RET assume_abort_if_not(var_1_4 <= 255) VAL [isInitial=1, var_1_10=37/4, var_1_11=5/4, var_1_12=100, var_1_13=64, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_5=0, var_1_6=0, var_1_7=1, var_1_8=32, var_1_9=23/5] [L92] var_1_5 = __VERIFIER_nondet_uchar() [L93] CALL assume_abort_if_not(var_1_5 >= 0) VAL [\old(cond)=1, isInitial=1, var_1_10=37/4, var_1_11=5/4, var_1_12=100, var_1_13=64, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_6=0, var_1_7=1, var_1_8=32, var_1_9=23/5] [L20] COND FALSE !(!cond) [L93] RET assume_abort_if_not(var_1_5 >= 0) VAL [isInitial=1, var_1_10=37/4, var_1_11=5/4, var_1_12=100, var_1_13=64, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_6=0, var_1_7=1, var_1_8=32, var_1_9=23/5] [L94] CALL assume_abort_if_not(var_1_5 <= 0) VAL [\old(cond)=1, isInitial=1, var_1_10=37/4, var_1_11=5/4, var_1_12=100, var_1_13=64, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_5=0, var_1_6=0, var_1_7=1, var_1_8=32, var_1_9=23/5] [L20] COND FALSE !(!cond) [L94] RET assume_abort_if_not(var_1_5 <= 0) VAL [isInitial=1, var_1_10=37/4, var_1_11=5/4, var_1_12=100, var_1_13=64, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_5=0, var_1_6=0, var_1_7=1, var_1_8=32, var_1_9=23/5] [L95] var_1_7 = __VERIFIER_nondet_uchar() [L96] CALL assume_abort_if_not(var_1_7 >= 1) VAL [\old(cond)=1, isInitial=1, var_1_10=37/4, var_1_11=5/4, var_1_12=100, var_1_13=64, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_5=0, var_1_6=0, var_1_7=1, var_1_8=32, var_1_9=23/5] [L20] COND FALSE !(!cond) [L96] RET assume_abort_if_not(var_1_7 >= 1) VAL [isInitial=1, var_1_10=37/4, var_1_11=5/4, var_1_12=100, var_1_13=64, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_5=0, var_1_6=0, var_1_7=1, var_1_8=32, var_1_9=23/5] [L97] CALL assume_abort_if_not(var_1_7 <= 1) VAL [\old(cond)=1, isInitial=1, var_1_10=37/4, var_1_11=5/4, var_1_12=100, var_1_13=64, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_5=0, var_1_6=0, var_1_7=1, var_1_8=32, var_1_9=23/5] [L20] COND FALSE !(!cond) [L97] RET assume_abort_if_not(var_1_7 <= 1) VAL [isInitial=1, var_1_10=37/4, var_1_11=5/4, var_1_12=100, var_1_13=64, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_5=0, var_1_6=0, var_1_7=1, var_1_8=32, var_1_9=23/5] [L98] var_1_8 = __VERIFIER_nondet_uchar() [L99] CALL assume_abort_if_not(var_1_8 >= 0) VAL [\old(cond)=1, isInitial=1, var_1_10=37/4, var_1_11=5/4, var_1_12=100, var_1_13=64, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_5=0, var_1_6=0, var_1_7=1, var_1_9=23/5] [L20] COND FALSE !(!cond) [L99] RET assume_abort_if_not(var_1_8 >= 0) VAL [isInitial=1, var_1_10=37/4, var_1_11=5/4, var_1_12=100, var_1_13=64, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_5=0, var_1_6=0, var_1_7=1, var_1_9=23/5] [L100] CALL assume_abort_if_not(var_1_8 <= 255) VAL [\old(cond)=1, isInitial=1, var_1_10=37/4, var_1_11=5/4, var_1_12=100, var_1_13=64, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_5=0, var_1_6=0, var_1_7=1, var_1_9=23/5] [L20] COND FALSE !(!cond) [L100] RET assume_abort_if_not(var_1_8 <= 255) VAL [isInitial=1, var_1_10=37/4, var_1_11=5/4, var_1_12=100, var_1_13=64, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_5=0, var_1_6=0, var_1_7=1, var_1_9=23/5] [L101] CALL assume_abort_if_not(var_1_8 != 0) VAL [\old(cond)=1, isInitial=1, var_1_10=37/4, var_1_11=5/4, var_1_12=100, var_1_13=64, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_5=0, var_1_6=0, var_1_7=1, var_1_8=2, var_1_9=23/5] [L20] COND FALSE !(!cond) [L101] RET assume_abort_if_not(var_1_8 != 0) VAL [isInitial=1, var_1_10=37/4, var_1_11=5/4, var_1_12=100, var_1_13=64, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_5=0, var_1_6=0, var_1_7=1, var_1_8=2, var_1_9=23/5] [L102] var_1_10 = __VERIFIER_nondet_double() [L103] CALL assume_abort_if_not((var_1_10 >= -922337.2036854765600e+13F && var_1_10 <= -1.0e-20F) || (var_1_10 <= 9223372.036854765600e+12F && var_1_10 >= 1.0e-20F )) VAL [\old(cond)=1, isInitial=1, var_1_11=5/4, var_1_12=100, var_1_13=64, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_5=0, var_1_6=0, var_1_7=1, var_1_8=2, var_1_9=23/5] [L20] COND FALSE !(!cond) [L103] RET assume_abort_if_not((var_1_10 >= -922337.2036854765600e+13F && var_1_10 <= -1.0e-20F) || (var_1_10 <= 9223372.036854765600e+12F && var_1_10 >= 1.0e-20F )) VAL [isInitial=1, var_1_11=5/4, var_1_12=100, var_1_13=64, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_5=0, var_1_6=0, var_1_7=1, var_1_8=2, var_1_9=23/5] [L104] var_1_13 = __VERIFIER_nondet_uchar() [L105] CALL assume_abort_if_not(var_1_13 >= 0) VAL [\old(cond)=1, isInitial=1, var_1_11=5/4, var_1_12=100, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_5=0, var_1_6=0, var_1_7=1, var_1_8=2, var_1_9=23/5] [L20] COND FALSE !(!cond) [L105] RET assume_abort_if_not(var_1_13 >= 0) VAL [isInitial=1, var_1_11=5/4, var_1_12=100, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_5=0, var_1_6=0, var_1_7=1, var_1_8=2, var_1_9=23/5] [L106] CALL assume_abort_if_not(var_1_13 <= 254) VAL [\old(cond)=1, isInitial=1, var_1_11=5/4, var_1_12=100, var_1_13=50, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_5=0, var_1_6=0, var_1_7=1, var_1_8=2, var_1_9=23/5] [L20] COND FALSE !(!cond) [L106] RET assume_abort_if_not(var_1_13 <= 254) VAL [isInitial=1, var_1_11=5/4, var_1_12=100, var_1_13=50, var_1_14=0, var_1_15=15/2, var_1_16=0, var_1_1=1, var_1_5=0, var_1_6=0, var_1_7=1, var_1_8=2, var_1_9=23/5] [L119] RET updateVariables() [L120] CALL step() [L41] EXPR var_1_3 ^ var_1_4 [L41] COND TRUE var_1_2 <= (var_1_3 ^ var_1_4) [L42] var_1_1 = (! var_1_5) [L46] COND FALSE !(-256 >= var_1_3) [L49] COND TRUE (var_1_2 < (var_1_4 / var_1_8)) || ((var_1_5 && var_1_7) && var_1_1) [L50] var_1_6 = var_1_7 [L53] COND FALSE !(((((((((var_1_2) < (var_1_3)) ? (var_1_2) : (var_1_3)))) > (var_1_4)) ? (((((var_1_2) < (var_1_3)) ? (var_1_2) : (var_1_3)))) : (var_1_4))) <= (50 * var_1_8)) [L56] COND TRUE (var_1_7 && var_1_1) || (! var_1_5) [L57] var_1_11 = var_1_10 [L59] COND TRUE \read(var_1_1) [L60] COND FALSE !(var_1_10 >= (- var_1_9)) [L67] var_1_12 = var_1_13 [L72] COND FALSE !((var_1_13 % (5u + 256u)) <= var_1_2) [L79] var_1_15 = var_1_10 [L80] var_1_16 = var_1_3 [L120] RET step() [L121] CALL, EXPR property() [L111] EXPR var_1_3 ^ var_1_4 [L111-L112] return ((((((((var_1_2 <= (var_1_3 ^ var_1_4)) ? (var_1_1 == ((unsigned char) (! var_1_5))) : (var_1_1 == ((unsigned char) (! var_1_5)))) && ((-256 >= var_1_3) ? (var_1_6 == ((unsigned char) (var_1_1 || var_1_7))) : (((var_1_2 < (var_1_4 / var_1_8)) || ((var_1_5 && var_1_7) && var_1_1)) ? (var_1_6 == ((unsigned char) var_1_7)) : 1))) && ((((((((((var_1_2) < (var_1_3)) ? (var_1_2) : (var_1_3)))) > (var_1_4)) ? (((((var_1_2) < (var_1_3)) ? (var_1_2) : (var_1_3)))) : (var_1_4))) <= (50 * var_1_8)) ? (var_1_9 == ((double) var_1_10)) : 1)) && (((var_1_7 && var_1_1) || (! var_1_5)) ? (var_1_11 == ((double) var_1_10)) : 1)) && (var_1_1 ? ((var_1_10 >= (- var_1_9)) ? ((var_1_8 != var_1_3) ? (var_1_12 == ((unsigned char) var_1_13)) : (var_1_12 == ((unsigned char) 50))) : (var_1_12 == ((unsigned char) var_1_13))) : (var_1_12 == ((unsigned char) var_1_13)))) && (((var_1_13 % (5u + 256u)) <= var_1_2) ? (((var_1_13 + 16) >= var_1_2) ? (var_1_14 == ((unsigned char) var_1_7)) : (var_1_14 == ((unsigned char) var_1_7))) : 1)) && (var_1_15 == ((float) var_1_10))) && (var_1_16 == ((signed long int) var_1_3)) ; [L121] RET, EXPR property() [L121] CALL __VERIFIER_assert(property()) [L19] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, isInitial=1, var_1_10=2, var_1_11=2, var_1_12=50, var_1_13=50, var_1_14=0, var_1_15=2, var_1_16=0, var_1_1=1, var_1_2=49, var_1_3=0, var_1_4=101, var_1_5=0, var_1_6=1, var_1_7=1, var_1_8=2, var_1_9=23/5] [L19] reach_error() VAL [\old(cond)=0, cond=0, isInitial=1, var_1_10=2, var_1_11=2, var_1_12=50, var_1_13=50, var_1_14=0, var_1_15=2, var_1_16=0, var_1_1=1, var_1_2=49, var_1_3=0, var_1_4=101, var_1_5=0, var_1_6=1, var_1_7=1, var_1_8=2, var_1_9=23/5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.8s, OverallIterations: 1, TraceHistogramMax: 16, 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=33occurred 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, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 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 23:56:20,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/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_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_codestructure_normal_file-68.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/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_66b7d104-82af-42ba-8823-4ce388d8bd42/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 bdb04820b0552f240cac64f9b4eeb39d6636c8d16d50737ca938c89bab3fc009 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:56:23,399 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:56:23,471 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-11-24 23:56:23,478 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:56:23,478 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:56:23,506 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:56:23,507 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:56:23,507 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:56:23,508 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:56:23,509 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:56:23,510 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:56:23,510 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:56:23,511 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:56:23,511 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:56:23,512 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:56:23,513 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:56:23,514 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:56:23,514 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:56:23,515 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:56:23,515 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:56:23,516 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:56:23,517 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:56:23,517 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:56:23,518 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:56:23,518 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 23:56:23,519 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-24 23:56:23,520 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-24 23:56:23,524 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:56:23,524 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:56:23,525 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:56:23,525 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:56:23,526 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 23:56:23,526 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:56:23,527 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:56:23,527 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:56:23,528 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:56:23,528 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:56:23,529 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:56:23,529 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-24 23:56:23,529 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-24 23:56:23,530 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:56:23,531 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:56:23,531 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:56:23,532 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:56:23,532 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_66b7d104-82af-42ba-8823-4ce388d8bd42/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bdb04820b0552f240cac64f9b4eeb39d6636c8d16d50737ca938c89bab3fc009 [2023-11-24 23:56:23,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:56:23,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:56:23,998 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:56:24,000 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:56:24,000 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:56:24,002 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/hardness-nfm22/hardness_codestructure_normal_file-68.i [2023-11-24 23:56:27,144 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:56:27,429 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:56:27,429 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/sv-benchmarks/c/hardness-nfm22/hardness_codestructure_normal_file-68.i [2023-11-24 23:56:27,441 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/data/c02680cdc/4abf8f86433a47579a2b8ffb0f5deafe/FLAG14bb82932 [2023-11-24 23:56:27,460 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/data/c02680cdc/4abf8f86433a47579a2b8ffb0f5deafe [2023-11-24 23:56:27,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:56:27,465 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:56:27,466 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:56:27,466 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:56:27,472 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:56:27,472 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:56:27" (1/1) ... [2023-11-24 23:56:27,474 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18baf55a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:27, skipping insertion in model container [2023-11-24 23:56:27,474 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:56:27" (1/1) ... [2023-11-24 23:56:27,504 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:56:27,663 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_66b7d104-82af-42ba-8823-4ce388d8bd42/sv-benchmarks/c/hardness-nfm22/hardness_codestructure_normal_file-68.i[913,926] [2023-11-24 23:56:27,715 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:56:27,737 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:56:27,752 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_66b7d104-82af-42ba-8823-4ce388d8bd42/sv-benchmarks/c/hardness-nfm22/hardness_codestructure_normal_file-68.i[913,926] [2023-11-24 23:56:27,806 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:56:27,828 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:56:27,829 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:27 WrapperNode [2023-11-24 23:56:27,829 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:56:27,831 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:56:27,831 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:56:27,831 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:56:27,840 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:27" (1/1) ... [2023-11-24 23:56:27,853 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:27" (1/1) ... [2023-11-24 23:56:27,883 INFO L138 Inliner]: procedures = 27, calls = 29, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 114 [2023-11-24 23:56:27,884 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:56:27,885 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:56:27,885 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:56:27,885 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:56:27,896 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:27" (1/1) ... [2023-11-24 23:56:27,896 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:27" (1/1) ... [2023-11-24 23:56:27,901 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:27" (1/1) ... [2023-11-24 23:56:27,902 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:27" (1/1) ... [2023-11-24 23:56:27,913 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:27" (1/1) ... [2023-11-24 23:56:27,917 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:27" (1/1) ... [2023-11-24 23:56:27,921 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:27" (1/1) ... [2023-11-24 23:56:27,923 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:27" (1/1) ... [2023-11-24 23:56:27,928 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:56:27,929 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:56:27,929 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:56:27,929 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:56:27,930 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:27" (1/1) ... [2023-11-24 23:56:27,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:56:27,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:56:27,990 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:56:27,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:56:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:56:28,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-24 23:56:28,036 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-24 23:56:28,036 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-24 23:56:28,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:56:28,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:56:28,127 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:56:28,132 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:56:28,759 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:56:28,808 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:56:28,809 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 23:56:28,809 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:56:28 BoogieIcfgContainer [2023-11-24 23:56:28,809 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:56:28,812 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:56:28,812 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:56:28,816 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:56:28,816 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:56:27" (1/3) ... [2023-11-24 23:56:28,817 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25cb5e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:56:28, skipping insertion in model container [2023-11-24 23:56:28,817 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:27" (2/3) ... [2023-11-24 23:56:28,817 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25cb5e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:56:28, skipping insertion in model container [2023-11-24 23:56:28,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:56:28" (3/3) ... [2023-11-24 23:56:28,819 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_codestructure_normal_file-68.i [2023-11-24 23:56:28,839 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:56:28,839 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:56:28,892 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:56:28,900 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;@31026f60, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:56:28,901 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:56:28,907 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 29 states have internal predecessors, (43), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-24 23:56:28,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-24 23:56:28,923 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:28,924 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:56:28,926 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:28,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:28,936 INFO L85 PathProgramCache]: Analyzing trace with hash -987653615, now seen corresponding path program 1 times [2023-11-24 23:56:28,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-24 23:56:28,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777235225] [2023-11-24 23:56:28,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:28,957 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 23:56:28,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/mathsat [2023-11-24 23:56:28,961 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/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 23:56:28,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/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 23:56:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:29,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-24 23:56:29,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:56:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-24 23:56:29,283 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:56:29,284 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-24 23:56:29,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777235225] [2023-11-24 23:56:29,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [777235225] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:29,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:29,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:56:29,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863477222] [2023-11-24 23:56:29,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:29,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 23:56:29,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-24 23:56:29,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 23:56:29,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 23:56:29,326 INFO L87 Difference]: Start difference. First operand has 47 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 29 states have internal predecessors, (43), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-24 23:56:29,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:29,589 INFO L93 Difference]: Finished difference Result 91 states and 164 transitions. [2023-11-24 23:56:29,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 23:56:29,599 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 99 [2023-11-24 23:56:29,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:29,609 INFO L225 Difference]: With dead ends: 91 [2023-11-24 23:56:29,609 INFO L226 Difference]: Without dead ends: 45 [2023-11-24 23:56:29,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 98 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 23:56:29,616 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:29,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:56:29,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-24 23:56:29,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-24 23:56:29,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-24 23:56:29,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 69 transitions. [2023-11-24 23:56:29,672 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 69 transitions. Word has length 99 [2023-11-24 23:56:29,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:29,674 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 69 transitions. [2023-11-24 23:56:29,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-24 23:56:29,674 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 69 transitions. [2023-11-24 23:56:29,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-24 23:56:29,679 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:29,680 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:56:29,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/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)] Ended with exit code 0 [2023-11-24 23:56:29,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/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 23:56:29,881 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:29,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:29,882 INFO L85 PathProgramCache]: Analyzing trace with hash 939860491, now seen corresponding path program 1 times [2023-11-24 23:56:29,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-24 23:56:29,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1325932370] [2023-11-24 23:56:29,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:29,883 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 23:56:29,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/mathsat [2023-11-24 23:56:29,884 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/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 23:56:29,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/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 23:56:30,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:30,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:56:30,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:56:30,506 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 253 proven. 24 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2023-11-24 23:56:30,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:56:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-11-24 23:56:30,816 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-24 23:56:30,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1325932370] [2023-11-24 23:56:30,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1325932370] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:56:30,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [908153286] [2023-11-24 23:56:30,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:30,817 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-24 23:56:30,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/cvc4 [2023-11-24 23:56:30,874 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-24 23:56:30,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2023-11-24 23:56:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:31,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 23:56:31,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:56:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-24 23:56:31,395 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:56:31,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [908153286] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:31,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-24 23:56:31,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 6] total 10 [2023-11-24 23:56:31,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436987885] [2023-11-24 23:56:31,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:31,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:56:31,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-24 23:56:31,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:56:31,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-24 23:56:31,401 INFO L87 Difference]: Start difference. First operand 45 states and 69 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-24 23:56:32,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:32,258 INFO L93 Difference]: Finished difference Result 135 states and 200 transitions. [2023-11-24 23:56:32,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:56:32,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 100 [2023-11-24 23:56:32,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:32,262 INFO L225 Difference]: With dead ends: 135 [2023-11-24 23:56:32,262 INFO L226 Difference]: Without dead ends: 91 [2023-11-24 23:56:32,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 289 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-24 23:56:32,265 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 93 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:32,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 118 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 23:56:32,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-24 23:56:32,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 50. [2023-11-24 23:56:32,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-24 23:56:32,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 73 transitions. [2023-11-24 23:56:32,285 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 73 transitions. Word has length 100 [2023-11-24 23:56:32,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:32,286 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 73 transitions. [2023-11-24 23:56:32,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-24 23:56:32,287 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 73 transitions. [2023-11-24 23:56:32,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-24 23:56:32,289 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:32,289 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:56:32,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/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 23:56:32,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2023-11-24 23:56:32,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/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=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt [2023-11-24 23:56:32,695 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:32,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:32,696 INFO L85 PathProgramCache]: Analyzing trace with hash 997118793, now seen corresponding path program 1 times [2023-11-24 23:56:32,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-24 23:56:32,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850352072] [2023-11-24 23:56:32,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:32,698 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 23:56:32,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/mathsat [2023-11-24 23:56:32,699 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/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 23:56:32,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/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)] Waiting until timeout for monitored process [2023-11-24 23:56:32,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:32,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 23:56:32,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:56:33,349 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 263 proven. 42 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2023-11-24 23:56:33,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:56:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 42 proven. 45 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2023-11-24 23:56:33,855 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-24 23:56:33,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850352072] [2023-11-24 23:56:33,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850352072] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:56:33,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1264384143] [2023-11-24 23:56:33,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:33,856 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-24 23:56:33,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/cvc4 [2023-11-24 23:56:33,859 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-24 23:56:33,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2023-11-24 23:56:34,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:34,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:56:34,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:56:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 253 proven. 24 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2023-11-24 23:56:34,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:56:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-11-24 23:56:34,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1264384143] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:56:34,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114246802] [2023-11-24 23:56:34,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:34,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:56:34,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:56:34,784 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:56:34,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 23:56:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:34,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 23:56:34,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:56:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 253 proven. 24 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2023-11-24 23:56:35,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:56:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-11-24 23:56:35,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114246802] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:56:35,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-24 23:56:35,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 5, 5, 5, 5] total 14 [2023-11-24 23:56:35,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037699468] [2023-11-24 23:56:35,270 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-24 23:56:35,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 23:56:35,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-24 23:56:35,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 23:56:35,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-24 23:56:35,274 INFO L87 Difference]: Start difference. First operand 50 states and 73 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 3 states have call successors, (38), 3 states have call predecessors, (38), 7 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2023-11-24 23:56:36,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:36,303 INFO L93 Difference]: Finished difference Result 110 states and 153 transitions. [2023-11-24 23:56:36,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-24 23:56:36,307 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 3 states have call successors, (38), 3 states have call predecessors, (38), 7 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) Word has length 100 [2023-11-24 23:56:36,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:36,310 INFO L225 Difference]: With dead ends: 110 [2023-11-24 23:56:36,311 INFO L226 Difference]: Without dead ends: 61 [2023-11-24 23:56:36,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 580 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2023-11-24 23:56:36,314 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 114 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:36,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 114 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 23:56:36,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-24 23:56:36,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2023-11-24 23:56:36,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 states have internal predecessors, (44), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-24 23:56:36,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 76 transitions. [2023-11-24 23:56:36,330 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 76 transitions. Word has length 100 [2023-11-24 23:56:36,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:36,331 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 76 transitions. [2023-11-24 23:56:36,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 3 states have call successors, (38), 3 states have call predecessors, (38), 7 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2023-11-24 23:56:36,331 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 76 transitions. [2023-11-24 23:56:36,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-24 23:56:36,333 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:36,334 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:56:36,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 23:56:36,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2023-11-24 23:56:36,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/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)] Forceful destruction successful, exit code 0 [2023-11-24 23:56:36,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/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 23:56:36,950 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:36,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:36,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1345783482, now seen corresponding path program 1 times [2023-11-24 23:56:36,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-24 23:56:36,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2001029622] [2023-11-24 23:56:36,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:36,952 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 23:56:36,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/bin/utaipan-verify-SwPr7d2a91/mathsat [2023-11-24 23:56:36,953 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/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 23:56:36,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b7d104-82af-42ba-8823-4ce388d8bd42/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 (8)] Waiting until timeout for monitored process [2023-11-24 23:56:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:37,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-24 23:56:37,159 INFO L285 TraceCheckSpWp]: Computing forward predicates...