./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG --witnessprinter.witness.filename witness.graphml --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 72e6a731e5f93184d8452e046ba5fa07483889ea5d4b2985d4608011d07f1d55 ............................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG --witnessprinter.witness.filename witness.graphml --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 72e6a731e5f93184d8452e046ba5fa07483889ea5d4b2985d4608011d07f1d55 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 05:19:44,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:19:44,175 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:19:44,244 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:19:44,245 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:19:44,249 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:19:44,253 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:19:44,258 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:19:44,261 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:19:44,268 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:19:44,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:19:44,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:19:44,272 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:19:44,275 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:19:44,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:19:44,285 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:19:44,287 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:19:44,288 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:19:44,294 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:19:44,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:19:44,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:19:44,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:19:44,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:19:44,306 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:19:44,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:19:44,310 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:19:44,311 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:19:44,312 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:19:44,312 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:19:44,314 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:19:44,314 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:19:44,315 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:19:44,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:19:44,322 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:19:44,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:19:44,325 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:19:44,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:19:44,326 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:19:44,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:19:44,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:19:44,328 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:19:44,329 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-29 05:19:44,376 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:19:44,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:19:44,378 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:19:44,378 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:19:44,378 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:19:44,379 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:19:44,379 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 05:19:44,379 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:19:44,379 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:19:44,379 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 05:19:44,381 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 05:19:44,381 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:19:44,381 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 05:19:44,382 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 05:19:44,382 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 05:19:44,383 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:19:44,383 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:19:44,383 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 05:19:44,383 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:19:44,384 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:19:44,384 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 05:19:44,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:19:44,384 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 05:19:44,384 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:19:44,385 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:19:44,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 05:19:44,385 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:19:44,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 05:19:44,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:19:44,387 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:19:44,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:19:44,388 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:19:44,388 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:19:44,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 05:19:44,389 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 05:19:44,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 05:19:44,389 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 05:19:44,389 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:19:44,390 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:19:44,390 INFO L138 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_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72e6a731e5f93184d8452e046ba5fa07483889ea5d4b2985d4608011d07f1d55 [2021-10-29 05:19:44,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:19:44,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:19:44,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:19:44,723 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:19:44,723 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:19:44,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2021-10-29 05:19:44,808 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/data/a7a64eba3/f537e847ffcc439bacdb97f8a19e0bd9/FLAG69ede472a [2021-10-29 05:19:45,311 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:19:45,311 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2021-10-29 05:19:45,328 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/data/a7a64eba3/f537e847ffcc439bacdb97f8a19e0bd9/FLAG69ede472a [2021-10-29 05:19:45,674 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/data/a7a64eba3/f537e847ffcc439bacdb97f8a19e0bd9 [2021-10-29 05:19:45,676 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:19:45,678 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:19:45,685 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:19:45,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:19:45,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:19:45,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:19:45" (1/1) ... [2021-10-29 05:19:45,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e9237c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:19:45, skipping insertion in model container [2021-10-29 05:19:45,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:19:45" (1/1) ... [2021-10-29 05:19:45,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:19:45,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:19:45,974 WARN L228 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_a7396beb-949e-4f80-8a08-903cb04083dc/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c[2154,2167] [2021-10-29 05:19:45,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:19:45,987 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:19:46,011 WARN L228 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_a7396beb-949e-4f80-8a08-903cb04083dc/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c[2154,2167] [2021-10-29 05:19:46,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:19:46,025 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:19:46,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:19:46 WrapperNode [2021-10-29 05:19:46,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:19:46,027 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:19:46,027 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:19:46,027 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:19:46,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:19:46" (1/1) ... [2021-10-29 05:19:46,043 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:19:46" (1/1) ... [2021-10-29 05:19:46,069 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:19:46,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:19:46,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:19:46,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:19:46,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:19:46" (1/1) ... [2021-10-29 05:19:46,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:19:46" (1/1) ... [2021-10-29 05:19:46,083 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:19:46" (1/1) ... [2021-10-29 05:19:46,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:19:46" (1/1) ... [2021-10-29 05:19:46,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:19:46" (1/1) ... [2021-10-29 05:19:46,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:19:46" (1/1) ... [2021-10-29 05:19:46,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:19:46" (1/1) ... [2021-10-29 05:19:46,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:19:46,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:19:46,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:19:46,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:19:46,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:19:46" (1/1) ... [2021-10-29 05:19:46,112 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:19:46,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:19:46,134 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:19:46,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:19:46,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 05:19:46,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:19:46,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-10-29 05:19:46,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:19:46,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:19:46,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-29 05:19:46,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-29 05:19:46,851 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:19:46,851 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-29 05:19:46,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:19:46 BoogieIcfgContainer [2021-10-29 05:19:46,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:19:46,856 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:19:46,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:19:46,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:19:46,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:19:45" (1/3) ... [2021-10-29 05:19:46,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68f9bf52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:19:46, skipping insertion in model container [2021-10-29 05:19:46,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:19:46" (2/3) ... [2021-10-29 05:19:46,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68f9bf52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:19:46, skipping insertion in model container [2021-10-29 05:19:46,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:19:46" (3/3) ... [2021-10-29 05:19:46,875 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1252b.c [2021-10-29 05:19:46,888 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:19:46,888 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-29 05:19:46,959 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:19:46,966 INFO L339 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=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-10-29 05:19:46,966 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-29 05:19:46,985 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:19:46,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-29 05:19:46,991 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:19:46,992 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:19:46,992 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:19:47,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:19:47,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1347970808, now seen corresponding path program 1 times [2021-10-29 05:19:47,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:19:47,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564886889] [2021-10-29 05:19:47,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:19:47,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:19:47,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:19:47,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:19:47,224 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:19:47,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564886889] [2021-10-29 05:19:47,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564886889] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:19:47,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:19:47,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 05:19:47,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755152561] [2021-10-29 05:19:47,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-29 05:19:47,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:19:47,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-29 05:19:47,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:19:47,255 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:19:47,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:19:47,272 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2021-10-29 05:19:47,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-29 05:19:47,274 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-29 05:19:47,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:19:47,285 INFO L225 Difference]: With dead ends: 35 [2021-10-29 05:19:47,285 INFO L226 Difference]: Without dead ends: 16 [2021-10-29 05:19:47,288 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:19:47,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-29 05:19:47,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-29 05:19:47,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:19:47,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-10-29 05:19:47,320 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 8 [2021-10-29 05:19:47,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:19:47,321 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-10-29 05:19:47,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:19:47,322 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-10-29 05:19:47,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-29 05:19:47,323 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:19:47,323 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:19:47,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-29 05:19:47,324 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:19:47,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:19:47,327 INFO L85 PathProgramCache]: Analyzing trace with hash 126778065, now seen corresponding path program 1 times [2021-10-29 05:19:47,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:19:47,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886722199] [2021-10-29 05:19:47,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:19:47,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:19:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:19:47,426 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 05:19:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:19:47,550 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-29 05:19:47,551 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 05:19:47,554 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:19:47,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-29 05:19:47,560 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1] [2021-10-29 05:19:47,563 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:19:47,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:19:47 BoogieIcfgContainer [2021-10-29 05:19:47,595 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:19:47,596 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:19:47,596 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:19:47,597 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:19:47,598 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:19:46" (3/4) ... [2021-10-29 05:19:47,601 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-29 05:19:47,601 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:19:47,603 INFO L168 Benchmark]: Toolchain (without parser) took 1924.31 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 47.6 MB in the beginning and 70.4 MB in the end (delta: -22.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:19:47,604 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 81.8 MB. Free memory was 60.8 MB in the beginning and 60.7 MB in the end (delta: 29.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:19:47,606 INFO L168 Benchmark]: CACSL2BoogieTranslator took 341.71 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 47.4 MB in the beginning and 73.8 MB in the end (delta: -26.4 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2021-10-29 05:19:47,608 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.54 ms. Allocated memory is still 98.6 MB. Free memory was 73.8 MB in the beginning and 71.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:19:47,613 INFO L168 Benchmark]: Boogie Preprocessor took 31.31 ms. Allocated memory is still 98.6 MB. Free memory was 71.8 MB in the beginning and 70.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:19:47,613 INFO L168 Benchmark]: RCFGBuilder took 751.94 ms. Allocated memory is still 98.6 MB. Free memory was 70.4 MB in the beginning and 69.7 MB in the end (delta: 696.4 kB). Peak memory consumption was 23.3 MB. Max. memory is 16.1 GB. [2021-10-29 05:19:47,614 INFO L168 Benchmark]: TraceAbstraction took 739.20 ms. Allocated memory is still 98.6 MB. Free memory was 69.3 MB in the beginning and 71.1 MB in the end (delta: -1.8 MB). Peak memory consumption was 24.3 MB. Max. memory is 16.1 GB. [2021-10-29 05:19:47,614 INFO L168 Benchmark]: Witness Printer took 4.70 ms. Allocated memory is still 98.6 MB. Free memory was 71.1 MB in the beginning and 70.4 MB in the end (delta: 693.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:19:47,622 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 81.8 MB. Free memory was 60.8 MB in the beginning and 60.7 MB in the end (delta: 29.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 341.71 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 47.4 MB in the beginning and 73.8 MB in the end (delta: -26.4 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.54 ms. Allocated memory is still 98.6 MB. Free memory was 73.8 MB in the beginning and 71.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.31 ms. Allocated memory is still 98.6 MB. Free memory was 71.8 MB in the beginning and 70.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 751.94 ms. Allocated memory is still 98.6 MB. Free memory was 70.4 MB in the beginning and 69.7 MB in the end (delta: 696.4 kB). Peak memory consumption was 23.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 739.20 ms. Allocated memory is still 98.6 MB. Free memory was 69.3 MB in the beginning and 71.1 MB in the end (delta: -1.8 MB). Peak memory consumption was 24.3 MB. Max. memory is 16.1 GB. * Witness Printer took 4.70 ms. Allocated memory is still 98.6 MB. Free memory was 71.1 MB in the beginning and 70.4 MB in the end (delta: 693.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * 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: 87]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 86, overapproximation of someUnaryDOUBLEoperation at line 82. Possible FailurePath: [L81] double x = 0.0; [L82] double y = -0.0; [L26] __uint32_t msw, lsw; [L29] ieee_double_shape_type ew_u; [L30] ew_u.value = (x) [L31] EXPR ew_u.parts.msw [L31] (msw) = ew_u.parts.msw [L32] EXPR ew_u.parts.lsw [L32] (lsw) = ew_u.parts.lsw [L35-L36] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L38-L39] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L41-L42] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L45-L46] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L49] return 0; [L54] COND TRUE __fpclassify_double(x) == 0 [L55] return y; [L83] double res = fmax_double(x, y); [L86] EXPR res == 0.0 && __signbit_double(res) == 0 [L86] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L87] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 7 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 [2021-10-29 05:19:47,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 05:19:50,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:19:50,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:19:50,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:19:50,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:19:50,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:19:50,404 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:19:50,409 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:19:50,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:19:50,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:19:50,422 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:19:50,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:19:50,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:19:50,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:19:50,429 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:19:50,434 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:19:50,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:19:50,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:19:50,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:19:50,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:19:50,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:19:50,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:19:50,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:19:50,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:19:50,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:19:50,468 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:19:50,468 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:19:50,471 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:19:50,471 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:19:50,473 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:19:50,473 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:19:50,474 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:19:50,476 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:19:50,477 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:19:50,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:19:50,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:19:50,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:19:50,481 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:19:50,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:19:50,483 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:19:50,484 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:19:50,489 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-29 05:19:50,531 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:19:50,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:19:50,533 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:19:50,534 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:19:50,534 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:19:50,534 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:19:50,534 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:19:50,535 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:19:50,535 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:19:50,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:19:50,538 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:19:50,538 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:19:50,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:19:50,539 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 05:19:50,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:19:50,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 05:19:50,540 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:19:50,540 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-29 05:19:50,540 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-29 05:19:50,540 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:19:50,541 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 05:19:50,541 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:19:50,541 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 05:19:50,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:19:50,542 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-29 05:19:50,542 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:19:50,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:19:50,543 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:19:50,543 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:19:50,543 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 05:19:50,543 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-29 05:19:50,544 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-29 05:19:50,544 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 05:19:50,544 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:19:50,545 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:19:50,545 INFO L138 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_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72e6a731e5f93184d8452e046ba5fa07483889ea5d4b2985d4608011d07f1d55 [2021-10-29 05:19:51,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:19:51,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:19:51,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:19:51,049 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:19:51,050 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:19:51,053 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2021-10-29 05:19:51,132 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/data/d440fd4b5/da5695c3f04c46f2b01b0a66da6dcbdc/FLAGb1095668b [2021-10-29 05:19:51,704 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:19:51,705 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2021-10-29 05:19:51,715 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/data/d440fd4b5/da5695c3f04c46f2b01b0a66da6dcbdc/FLAGb1095668b [2021-10-29 05:19:52,072 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/data/d440fd4b5/da5695c3f04c46f2b01b0a66da6dcbdc [2021-10-29 05:19:52,076 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:19:52,078 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:19:52,081 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:19:52,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:19:52,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:19:52,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:19:52" (1/1) ... [2021-10-29 05:19:52,088 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dad35ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:19:52, skipping insertion in model container [2021-10-29 05:19:52,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:19:52" (1/1) ... [2021-10-29 05:19:52,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:19:52,116 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:19:52,332 WARN L228 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_a7396beb-949e-4f80-8a08-903cb04083dc/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c[2154,2167] [2021-10-29 05:19:52,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:19:52,346 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:19:52,411 WARN L228 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_a7396beb-949e-4f80-8a08-903cb04083dc/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c[2154,2167] [2021-10-29 05:19:52,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:19:52,434 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:19:52,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:19:52 WrapperNode [2021-10-29 05:19:52,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:19:52,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:19:52,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:19:52,436 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:19:52,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:19:52" (1/1) ... [2021-10-29 05:19:52,455 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:19:52" (1/1) ... [2021-10-29 05:19:52,480 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:19:52,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:19:52,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:19:52,481 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:19:52,489 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:19:52" (1/1) ... [2021-10-29 05:19:52,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:19:52" (1/1) ... [2021-10-29 05:19:52,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:19:52" (1/1) ... [2021-10-29 05:19:52,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:19:52" (1/1) ... [2021-10-29 05:19:52,504 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:19:52" (1/1) ... [2021-10-29 05:19:52,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:19:52" (1/1) ... [2021-10-29 05:19:52,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:19:52" (1/1) ... [2021-10-29 05:19:52,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:19:52,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:19:52,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:19:52,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:19:52,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:19:52" (1/1) ... [2021-10-29 05:19:52,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:19:52,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:19:52,576 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:19:52,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:19:52,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2021-10-29 05:19:52,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-29 05:19:52,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:19:52,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-29 05:19:52,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:19:52,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:19:52,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-29 05:19:53,138 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:19:53,138 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-29 05:19:53,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:19:53 BoogieIcfgContainer [2021-10-29 05:19:53,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:19:53,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:19:53,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:19:53,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:19:53,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:19:52" (1/3) ... [2021-10-29 05:19:53,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f0a8bd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:19:53, skipping insertion in model container [2021-10-29 05:19:53,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:19:52" (2/3) ... [2021-10-29 05:19:53,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f0a8bd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:19:53, skipping insertion in model container [2021-10-29 05:19:53,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:19:53" (3/3) ... [2021-10-29 05:19:53,154 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1252b.c [2021-10-29 05:19:53,161 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:19:53,161 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-29 05:19:53,225 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:19:53,234 INFO L339 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=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-10-29 05:19:53,234 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-29 05:19:53,250 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:19:53,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-29 05:19:53,261 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:19:53,261 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:19:53,262 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:19:53,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:19:53,268 INFO L85 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2021-10-29 05:19:53,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:19:53,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123759799] [2021-10-29 05:19:53,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:19:53,297 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:19:53,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:19:53,301 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:19:53,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-29 05:19:53,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:19:53,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-29 05:19:53,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:19:53,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:19:53,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:19:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:19:53,557 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:19:53,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123759799] [2021-10-29 05:19:53,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123759799] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:19:53,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:19:53,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-29 05:19:53,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425536478] [2021-10-29 05:19:53,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-29 05:19:53,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:19:53,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-29 05:19:53,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:19:53,585 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:19:53,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:19:53,607 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2021-10-29 05:19:53,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-29 05:19:53,609 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-29 05:19:53,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:19:53,619 INFO L225 Difference]: With dead ends: 62 [2021-10-29 05:19:53,619 INFO L226 Difference]: Without dead ends: 29 [2021-10-29 05:19:53,622 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:19:53,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-29 05:19:53,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-29 05:19:53,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:19:53,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-10-29 05:19:53,661 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2021-10-29 05:19:53,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:19:53,662 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-10-29 05:19:53,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:19:53,663 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-10-29 05:19:53,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-29 05:19:53,664 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:19:53,665 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:19:53,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-29 05:19:53,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:19:53,878 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:19:53,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:19:53,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2021-10-29 05:19:53,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:19:53,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148610111] [2021-10-29 05:19:53,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:19:53,880 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:19:53,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:19:53,882 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:19:53,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-29 05:19:53,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:19:53,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-29 05:19:53,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:19:54,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:19:54,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:19:54,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:19:54,143 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:19:54,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148610111] [2021-10-29 05:19:54,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148610111] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:19:54,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:19:54,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-29 05:19:54,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414441609] [2021-10-29 05:19:54,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-29 05:19:54,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:19:54,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-29 05:19:54,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-29 05:19:54,149 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:19:54,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:19:54,284 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2021-10-29 05:19:54,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-29 05:19:54,285 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-29 05:19:54,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:19:54,289 INFO L225 Difference]: With dead ends: 68 [2021-10-29 05:19:54,289 INFO L226 Difference]: Without dead ends: 59 [2021-10-29 05:19:54,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-29 05:19:54,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-29 05:19:54,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2021-10-29 05:19:54,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:19:54,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-29 05:19:54,313 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2021-10-29 05:19:54,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:19:54,314 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-29 05:19:54,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:19:54,315 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-29 05:19:54,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-29 05:19:54,318 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:19:54,318 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:19:54,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-29 05:19:54,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:19:54,538 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:19:54,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:19:54,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2021-10-29 05:19:54,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:19:54,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098784494] [2021-10-29 05:19:54,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:19:54,540 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:19:54,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:19:54,541 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:19:54,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-29 05:19:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:19:54,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-29 05:19:54,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:19:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:19:54,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:19:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:19:54,916 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:19:54,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098784494] [2021-10-29 05:19:54,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098784494] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:19:54,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:19:54,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-29 05:19:54,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763329793] [2021-10-29 05:19:54,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-29 05:19:54,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:19:54,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-29 05:19:54,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-29 05:19:54,919 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:19:55,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:19:55,044 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-10-29 05:19:55,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:19:55,046 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-29 05:19:55,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:19:55,047 INFO L225 Difference]: With dead ends: 52 [2021-10-29 05:19:55,047 INFO L226 Difference]: Without dead ends: 28 [2021-10-29 05:19:55,047 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-29 05:19:55,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-29 05:19:55,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-29 05:19:55,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:19:55,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-10-29 05:19:55,051 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 14 [2021-10-29 05:19:55,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:19:55,052 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-10-29 05:19:55,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:19:55,052 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-10-29 05:19:55,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-29 05:19:55,053 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:19:55,053 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:19:55,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-29 05:19:55,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:19:55,264 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:19:55,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:19:55,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2021-10-29 05:19:55,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:19:55,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659173591] [2021-10-29 05:19:55,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:19:55,266 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:19:55,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:19:55,267 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:19:55,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-29 05:19:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:19:55,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-29 05:19:55,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:19:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:19:55,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:19:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:19:55,513 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:19:55,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659173591] [2021-10-29 05:19:55,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659173591] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:19:55,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:19:55,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-29 05:19:55,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265569729] [2021-10-29 05:19:55,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-29 05:19:55,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:19:55,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-29 05:19:55,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-29 05:19:55,516 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:19:55,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:19:55,593 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2021-10-29 05:19:55,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-29 05:19:55,594 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-29 05:19:55,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:19:55,598 INFO L225 Difference]: With dead ends: 65 [2021-10-29 05:19:55,598 INFO L226 Difference]: Without dead ends: 56 [2021-10-29 05:19:55,598 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-29 05:19:55,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-29 05:19:55,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 30. [2021-10-29 05:19:55,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:19:55,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-10-29 05:19:55,613 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 16 [2021-10-29 05:19:55,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:19:55,613 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-10-29 05:19:55,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:19:55,614 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-10-29 05:19:55,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-29 05:19:55,615 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:19:55,616 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:19:55,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-29 05:19:55,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:19:55,837 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:19:55,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:19:55,838 INFO L85 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2021-10-29 05:19:55,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:19:55,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183260135] [2021-10-29 05:19:55,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:19:55,839 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:19:55,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:19:55,840 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:19:55,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-29 05:19:55,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:19:55,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-29 05:19:55,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:19:56,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:19:56,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:19:56,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:19:56,282 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:19:56,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183260135] [2021-10-29 05:19:56,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183260135] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:19:56,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:19:56,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-29 05:19:56,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977611717] [2021-10-29 05:19:56,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:19:56,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:19:56,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:19:56,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:19:56,284 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:19:56,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:19:56,301 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2021-10-29 05:19:56,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:19:56,302 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-29 05:19:56,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:19:56,302 INFO L225 Difference]: With dead ends: 40 [2021-10-29 05:19:56,303 INFO L226 Difference]: Without dead ends: 30 [2021-10-29 05:19:56,303 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:19:56,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-29 05:19:56,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-10-29 05:19:56,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:19:56,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-10-29 05:19:56,308 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 18 [2021-10-29 05:19:56,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:19:56,308 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-10-29 05:19:56,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:19:56,308 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-10-29 05:19:56,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-29 05:19:56,309 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:19:56,309 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:19:56,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-29 05:19:56,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:19:56,517 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:19:56,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:19:56,518 INFO L85 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2021-10-29 05:19:56,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:19:56,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445624762] [2021-10-29 05:19:56,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:19:56,519 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:19:56,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:19:56,520 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:19:56,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-29 05:19:56,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:19:56,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-29 05:19:56,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:19:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:19:56,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:19:56,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:19:56,892 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:19:56,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445624762] [2021-10-29 05:19:56,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445624762] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:19:56,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:19:56,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-10-29 05:19:56,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195375915] [2021-10-29 05:19:56,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:19:56,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:19:56,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:19:56,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:19:56,895 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:19:57,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:19:57,009 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-10-29 05:19:57,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-29 05:19:57,010 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-29 05:19:57,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:19:57,011 INFO L225 Difference]: With dead ends: 42 [2021-10-29 05:19:57,011 INFO L226 Difference]: Without dead ends: 39 [2021-10-29 05:19:57,011 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-29 05:19:57,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-29 05:19:57,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2021-10-29 05:19:57,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:19:57,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-10-29 05:19:57,016 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 18 [2021-10-29 05:19:57,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:19:57,016 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-10-29 05:19:57,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:19:57,017 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-10-29 05:19:57,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-29 05:19:57,017 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:19:57,017 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:19:57,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-29 05:19:57,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:19:57,231 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:19:57,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:19:57,232 INFO L85 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2021-10-29 05:19:57,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:19:57,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114166408] [2021-10-29 05:19:57,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:19:57,232 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:19:57,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:19:57,233 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:19:57,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-29 05:19:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:19:57,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-29 05:19:57,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:19:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:19:57,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:19:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:19:57,897 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:19:57,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114166408] [2021-10-29 05:19:57,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114166408] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:19:57,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:19:57,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-29 05:19:57,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855570361] [2021-10-29 05:19:57,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-29 05:19:57,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:19:57,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-29 05:19:57,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-29 05:19:57,900 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:19:57,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:19:57,979 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-10-29 05:19:57,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 05:19:57,982 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-29 05:19:57,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:19:57,983 INFO L225 Difference]: With dead ends: 45 [2021-10-29 05:19:57,983 INFO L226 Difference]: Without dead ends: 27 [2021-10-29 05:19:57,983 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-29 05:19:57,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-29 05:19:57,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-29 05:19:57,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:19:57,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-29 05:19:57,988 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 19 [2021-10-29 05:19:57,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:19:57,988 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-29 05:19:57,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:19:57,989 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-29 05:19:57,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-29 05:19:57,990 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:19:57,990 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:19:58,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-29 05:19:58,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:19:58,203 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:19:58,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:19:58,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2021-10-29 05:19:58,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:19:58,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173582048] [2021-10-29 05:19:58,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:19:58,205 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:19:58,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:19:58,206 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:19:58,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-29 05:19:58,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:19:58,391 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 05:19:58,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:19:58,516 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-29 05:19:58,516 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 05:19:58,517 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:19:58,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-29 05:19:58,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:19:58,722 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:19:58,725 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:19:58,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:19:58 BoogieIcfgContainer [2021-10-29 05:19:58,762 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:19:58,763 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:19:58,763 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:19:58,763 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:19:58,764 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:19:53" (3/4) ... [2021-10-29 05:19:58,766 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-29 05:19:58,813 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/witness.graphml [2021-10-29 05:19:58,813 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:19:58,814 INFO L168 Benchmark]: Toolchain (without parser) took 6735.57 ms. Allocated memory was 71.3 MB in the beginning and 88.1 MB in the end (delta: 16.8 MB). Free memory was 52.4 MB in the beginning and 50.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 18.7 MB. Max. memory is 16.1 GB. [2021-10-29 05:19:58,815 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 71.3 MB. Free memory is still 51.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:19:58,815 INFO L168 Benchmark]: CACSL2BoogieTranslator took 353.41 ms. Allocated memory is still 71.3 MB. Free memory was 52.2 MB in the beginning and 52.9 MB in the end (delta: -697.4 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-29 05:19:58,816 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.43 ms. Allocated memory is still 71.3 MB. Free memory was 52.9 MB in the beginning and 51.0 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:19:58,816 INFO L168 Benchmark]: Boogie Preprocessor took 41.80 ms. Allocated memory is still 71.3 MB. Free memory was 51.0 MB in the beginning and 49.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:19:58,817 INFO L168 Benchmark]: RCFGBuilder took 617.30 ms. Allocated memory is still 71.3 MB. Free memory was 49.3 MB in the beginning and 35.6 MB in the end (delta: 13.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-29 05:19:58,817 INFO L168 Benchmark]: TraceAbstraction took 5620.19 ms. Allocated memory was 71.3 MB in the beginning and 88.1 MB in the end (delta: 16.8 MB). Free memory was 35.3 MB in the beginning and 53.5 MB in the end (delta: -18.2 MB). Peak memory consumption was 859.5 kB. Max. memory is 16.1 GB. [2021-10-29 05:19:58,818 INFO L168 Benchmark]: Witness Printer took 50.08 ms. Allocated memory is still 88.1 MB. Free memory was 53.5 MB in the beginning and 50.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:19:58,820 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 71.3 MB. Free memory is still 51.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 353.41 ms. Allocated memory is still 71.3 MB. Free memory was 52.2 MB in the beginning and 52.9 MB in the end (delta: -697.4 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.43 ms. Allocated memory is still 71.3 MB. Free memory was 52.9 MB in the beginning and 51.0 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.80 ms. Allocated memory is still 71.3 MB. Free memory was 51.0 MB in the beginning and 49.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 617.30 ms. Allocated memory is still 71.3 MB. Free memory was 49.3 MB in the beginning and 35.6 MB in the end (delta: 13.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5620.19 ms. Allocated memory was 71.3 MB in the beginning and 88.1 MB in the end (delta: 16.8 MB). Free memory was 35.3 MB in the beginning and 53.5 MB in the end (delta: -18.2 MB). Peak memory consumption was 859.5 kB. Max. memory is 16.1 GB. * Witness Printer took 50.08 ms. Allocated memory is still 88.1 MB. Free memory was 53.5 MB in the beginning and 50.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * 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 - CounterExampleResult [Line: 87]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L81] double x = 0.0; [L82] double y = -0.0; [L26] __uint32_t msw, lsw; [L29] ieee_double_shape_type ew_u; [L30] ew_u.value = (x) [L31] EXPR ew_u.parts.msw [L31] (msw) = ew_u.parts.msw [L32] EXPR ew_u.parts.lsw [L32] (lsw) = ew_u.parts.lsw [L35-L36] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L37] return 2; [L54] COND FALSE !(__fpclassify_double(x) == 0) [L26] __uint32_t msw, lsw; [L29] ieee_double_shape_type ew_u; [L30] ew_u.value = (x) [L31] EXPR ew_u.parts.msw [L31] (msw) = ew_u.parts.msw [L32] EXPR ew_u.parts.lsw [L32] (lsw) = ew_u.parts.lsw [L35-L36] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L37] return 2; [L56] COND FALSE !(__fpclassify_double(y) == 0) [L59] EXPR x > y ? x : y [L59] return x > y ? x : y; [L83] double res = fmax_double(x, y); [L86] EXPR res == 0.0 && __signbit_double(res) == 0 [L63] __uint32_t msw; [L66] ieee_double_shape_type gh_u; [L67] gh_u.value = (x) [L68] EXPR gh_u.parts.msw [L68] (msw) = gh_u.parts.msw [L71] return (msw & 0x80000000) != 0; [L86] EXPR res == 0.0 && __signbit_double(res) == 0 [L86] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L87] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.5s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 234 SDtfs, 249 SDslu, 387 SDs, 0 SdLazy, 128 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 61 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 198 ConstructedInterpolants, 15 QuantifiedInterpolants, 696 SizeOfPredicates, 27 NumberOfNonLiveVariables, 423 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 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 proved your program to be incorrect! [2021-10-29 05:19:58,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7396beb-949e-4f80-8a08-903cb04083dc/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...