./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1251.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_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/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_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1251.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/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_b572255f-578e-4805-89b8-a4e64b782395/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 de540e539c3db6027c1fdb04fcc6cae02aafb8aa58950d31054b2b0b8391af6d ................................................................................................................................................................................................................................................................................................................................ 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_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/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_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1251.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/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_b572255f-578e-4805-89b8-a4e64b782395/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 de540e539c3db6027c1fdb04fcc6cae02aafb8aa58950d31054b2b0b8391af6d .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 05:28:20,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:28:20,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:28:20,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:28:20,375 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:28:20,376 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:28:20,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:28:20,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:28:20,382 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:28:20,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:28:20,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:28:20,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:28:20,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:28:20,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:28:20,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:28:20,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:28:20,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:28:20,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:28:20,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:28:20,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:28:20,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:28:20,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:28:20,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:28:20,404 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:28:20,407 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:28:20,408 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:28:20,408 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:28:20,409 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:28:20,410 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:28:20,411 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:28:20,412 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:28:20,413 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:28:20,413 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:28:20,414 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:28:20,416 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:28:20,416 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:28:20,417 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:28:20,418 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:28:20,419 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:28:20,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:28:20,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:28:20,427 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-29 05:28:20,461 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:28:20,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:28:20,463 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:28:20,463 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:28:20,464 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:28:20,464 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:28:20,465 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 05:28:20,465 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:28:20,465 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:28:20,465 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 05:28:20,472 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 05:28:20,472 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:28:20,473 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 05:28:20,473 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 05:28:20,473 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 05:28:20,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:28:20,474 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:28:20,474 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 05:28:20,475 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:28:20,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:28:20,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 05:28:20,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:28:20,476 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 05:28:20,476 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:28:20,476 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:28:20,476 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 05:28:20,476 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:28:20,477 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 05:28:20,477 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:28:20,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:28:20,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:28:20,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:28:20,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:28:20,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 05:28:20,480 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 05:28:20,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 05:28:20,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 05:28:20,481 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:28:20,481 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:28:20,481 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_b572255f-578e-4805-89b8-a4e64b782395/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de540e539c3db6027c1fdb04fcc6cae02aafb8aa58950d31054b2b0b8391af6d [2021-10-29 05:28:20,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:28:20,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:28:20,878 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:28:20,879 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:28:20,880 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:28:20,880 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/float-newlib/float_req_bl_1251.c [2021-10-29 05:28:20,954 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/data/2b7e2e855/208fb3a3036a4ba3a2736f559855d027/FLAG16e7bdcf7 [2021-10-29 05:28:21,463 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:28:21,463 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/sv-benchmarks/c/float-newlib/float_req_bl_1251.c [2021-10-29 05:28:21,470 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/data/2b7e2e855/208fb3a3036a4ba3a2736f559855d027/FLAG16e7bdcf7 [2021-10-29 05:28:21,840 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/data/2b7e2e855/208fb3a3036a4ba3a2736f559855d027 [2021-10-29 05:28:21,843 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:28:21,844 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:28:21,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:28:21,847 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:28:21,850 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:28:21,851 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:28:21" (1/1) ... [2021-10-29 05:28:21,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c906c80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:21, skipping insertion in model container [2021-10-29 05:28:21,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:28:21" (1/1) ... [2021-10-29 05:28:21,860 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:28:21,878 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:28:22,082 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_b572255f-578e-4805-89b8-a4e64b782395/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[1980,1993] [2021-10-29 05:28:22,086 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_b572255f-578e-4805-89b8-a4e64b782395/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[2139,2152] [2021-10-29 05:28:22,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:28:22,096 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:28:22,119 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_b572255f-578e-4805-89b8-a4e64b782395/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[1980,1993] [2021-10-29 05:28:22,120 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_b572255f-578e-4805-89b8-a4e64b782395/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[2139,2152] [2021-10-29 05:28:22,122 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:28:22,136 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:28:22,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:22 WrapperNode [2021-10-29 05:28:22,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:28:22,138 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:28:22,138 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:28:22,138 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:28:22,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:22" (1/1) ... [2021-10-29 05:28:22,153 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:22" (1/1) ... [2021-10-29 05:28:22,182 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:28:22,183 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:28:22,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:28:22,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:28:22,192 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:22" (1/1) ... [2021-10-29 05:28:22,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:22" (1/1) ... [2021-10-29 05:28:22,195 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:22" (1/1) ... [2021-10-29 05:28:22,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:22" (1/1) ... [2021-10-29 05:28:22,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:22" (1/1) ... [2021-10-29 05:28:22,208 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:22" (1/1) ... [2021-10-29 05:28:22,210 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:22" (1/1) ... [2021-10-29 05:28:22,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:28:22,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:28:22,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:28:22,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:28:22,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:22" (1/1) ... [2021-10-29 05:28:22,222 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:28:22,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:28:22,245 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:28:22,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:28:22,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 05:28:22,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:28:22,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-10-29 05:28:22,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:28:22,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:28:22,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-29 05:28:22,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-29 05:28:23,220 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:28:23,221 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2021-10-29 05:28:23,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:28:23 BoogieIcfgContainer [2021-10-29 05:28:23,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:28:23,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:28:23,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:28:23,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:28:23,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:28:21" (1/3) ... [2021-10-29 05:28:23,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43ced04c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:28:23, skipping insertion in model container [2021-10-29 05:28:23,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:22" (2/3) ... [2021-10-29 05:28:23,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43ced04c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:28:23, skipping insertion in model container [2021-10-29 05:28:23,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:28:23" (3/3) ... [2021-10-29 05:28:23,235 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1251.c [2021-10-29 05:28:23,241 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:28:23,241 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-29 05:28:23,298 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:28:23,308 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 05:28:23,308 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-29 05:28:23,323 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 16 states have (on average 1.625) internal successors, (26), 18 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 05:28:23,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-29 05:28:23,342 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:28:23,344 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:28:23,345 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:28:23,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:28:23,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1154142022, now seen corresponding path program 1 times [2021-10-29 05:28:23,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:28:23,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524034653] [2021-10-29 05:28:23,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:28:23,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:28:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:28:23,529 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 05:28:23,529 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:28:23,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524034653] [2021-10-29 05:28:23,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524034653] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:28:23,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:28:23,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 05:28:23,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398151541] [2021-10-29 05:28:23,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-29 05:28:23,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:28:23,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-29 05:28:23,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:28:23,557 INFO L87 Difference]: Start difference. First operand has 19 states, 16 states have (on average 1.625) internal successors, (26), 18 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 05:28:23,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:28:23,574 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2021-10-29 05:28:23,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-29 05:28:23,577 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 05:28:23,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:28:23,584 INFO L225 Difference]: With dead ends: 36 [2021-10-29 05:28:23,585 INFO L226 Difference]: Without dead ends: 16 [2021-10-29 05:28:23,588 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 05:28:23,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-29 05:28:23,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-29 05:28:23,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 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 05:28:23,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-10-29 05:28:23,619 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 8 [2021-10-29 05:28:23,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:28:23,620 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-10-29 05:28:23,621 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 05:28:23,621 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-10-29 05:28:23,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-29 05:28:23,622 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:28:23,622 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:28:23,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-29 05:28:23,623 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:28:23,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:28:23,625 INFO L85 PathProgramCache]: Analyzing trace with hash -749756590, now seen corresponding path program 1 times [2021-10-29 05:28:23,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:28:23,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312792965] [2021-10-29 05:28:23,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:28:23,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:28:23,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:28:23,786 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 05:28:23,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:28:23,891 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-29 05:28:23,892 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 05:28:23,893 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:28:23,895 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:28:23,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-29 05:28:23,899 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1] [2021-10-29 05:28:23,902 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:28:23,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:28:23 BoogieIcfgContainer [2021-10-29 05:28:23,951 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:28:23,951 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:28:23,952 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:28:23,952 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:28:23,952 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:28:23" (3/4) ... [2021-10-29 05:28:23,955 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-29 05:28:23,955 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:28:23,958 INFO L168 Benchmark]: Toolchain (without parser) took 2112.35 ms. Allocated memory is still 102.8 MB. Free memory was 64.9 MB in the beginning and 44.4 MB in the end (delta: 20.6 MB). Peak memory consumption was 21.5 MB. Max. memory is 16.1 GB. [2021-10-29 05:28:23,960 INFO L168 Benchmark]: CDTParser took 0.56 ms. Allocated memory is still 102.8 MB. Free memory was 81.7 MB in the beginning and 81.7 MB in the end (delta: 67.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:28:23,961 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.54 ms. Allocated memory is still 102.8 MB. Free memory was 64.7 MB in the beginning and 78.0 MB in the end (delta: -13.3 MB). Peak memory consumption was 11.9 MB. Max. memory is 16.1 GB. [2021-10-29 05:28:23,963 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.97 ms. Allocated memory is still 102.8 MB. Free memory was 78.0 MB in the beginning and 75.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:28:23,968 INFO L168 Benchmark]: Boogie Preprocessor took 29.61 ms. Allocated memory is still 102.8 MB. Free memory was 75.9 MB in the beginning and 74.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:28:23,969 INFO L168 Benchmark]: RCFGBuilder took 1010.53 ms. Allocated memory is still 102.8 MB. Free memory was 74.3 MB in the beginning and 75.8 MB in the end (delta: -1.5 MB). Peak memory consumption was 39.8 MB. Max. memory is 16.1 GB. [2021-10-29 05:28:23,969 INFO L168 Benchmark]: TraceAbstraction took 724.92 ms. Allocated memory is still 102.8 MB. Free memory was 75.4 MB in the beginning and 44.8 MB in the end (delta: 30.5 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. [2021-10-29 05:28:23,970 INFO L168 Benchmark]: Witness Printer took 4.40 ms. Allocated memory is still 102.8 MB. Free memory was 44.8 MB in the beginning and 44.4 MB in the end (delta: 454.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:28:23,977 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.56 ms. Allocated memory is still 102.8 MB. Free memory was 81.7 MB in the beginning and 81.7 MB in the end (delta: 67.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 290.54 ms. Allocated memory is still 102.8 MB. Free memory was 64.7 MB in the beginning and 78.0 MB in the end (delta: -13.3 MB). Peak memory consumption was 11.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.97 ms. Allocated memory is still 102.8 MB. Free memory was 78.0 MB in the beginning and 75.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.61 ms. Allocated memory is still 102.8 MB. Free memory was 75.9 MB in the beginning and 74.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1010.53 ms. Allocated memory is still 102.8 MB. Free memory was 74.3 MB in the beginning and 75.8 MB in the end (delta: -1.5 MB). Peak memory consumption was 39.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 724.92 ms. Allocated memory is still 102.8 MB. Free memory was 75.4 MB in the beginning and 44.8 MB in the end (delta: 30.5 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. * Witness Printer took 4.40 ms. Allocated memory is still 102.8 MB. Free memory was 44.8 MB in the beginning and 44.4 MB in the end (delta: 454.9 kB). There was no memory consumed. 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: 76]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 75. Possible FailurePath: [L66] float x = __VERIFIER_nondet_float(); [L67] float y = __VERIFIER_nondet_float(); [L57] return x != x; [L69] EXPR isnan_float(x) && !isnan_float(y) [L69-L70] (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) [L57] return x != x; [L70] EXPR !isnan_float(x) && isnan_float(y) [L57] return x != x; [L70] EXPR !isnan_float(x) && isnan_float(y) [L69-L70] (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) [L69-L70] COND TRUE (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) [L23] __uint32_t w; [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L33-L34] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L36-L37] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L39] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L42] return 0; [L46] COND TRUE __fpclassify_float(x) == 0 [L47] return y; [L72] float res = fmax_float(x, y); [L57] return x != x; [L75] EXPR isnan_float(x) && !isnan_float(y) [L57] return x != x; [L75] EXPR isnan_float(x) && !isnan_float(y) [L75] COND TRUE isnan_float(x) && !isnan_float(y) && res != y [L76] reach_error() - UnprovableResult [Line: 82]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 2 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: 20 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=19occurred 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 05:28:24,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/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 05:28:26,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:28:26,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:28:26,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:28:26,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:28:26,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:28:26,505 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:28:26,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:28:26,513 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:28:26,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:28:26,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:28:26,529 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:28:26,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:28:26,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:28:26,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:28:26,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:28:26,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:28:26,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:28:26,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:28:26,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:28:26,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:28:26,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:28:26,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:28:26,553 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:28:26,562 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:28:26,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:28:26,563 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:28:26,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:28:26,566 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:28:26,567 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:28:26,568 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:28:26,569 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:28:26,571 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:28:26,572 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:28:26,573 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:28:26,574 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:28:26,575 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:28:26,575 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:28:26,576 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:28:26,578 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:28:26,578 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:28:26,579 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-29 05:28:26,627 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:28:26,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:28:26,629 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:28:26,630 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:28:26,630 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:28:26,630 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:28:26,630 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:28:26,631 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:28:26,632 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:28:26,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:28:26,635 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:28:26,635 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:28:26,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:28:26,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 05:28:26,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:28:26,636 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 05:28:26,636 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:28:26,636 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-29 05:28:26,636 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-29 05:28:26,637 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:28:26,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 05:28:26,637 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:28:26,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 05:28:26,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:28:26,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-29 05:28:26,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:28:26,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:28:26,639 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:28:26,639 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:28:26,639 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 05:28:26,639 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-29 05:28:26,640 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-29 05:28:26,640 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 05:28:26,640 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:28:26,640 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:28:26,641 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_b572255f-578e-4805-89b8-a4e64b782395/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de540e539c3db6027c1fdb04fcc6cae02aafb8aa58950d31054b2b0b8391af6d [2021-10-29 05:28:27,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:28:27,035 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:28:27,037 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:28:27,038 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:28:27,040 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:28:27,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/float-newlib/float_req_bl_1251.c [2021-10-29 05:28:27,123 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/data/7110a7e5f/e7f127b3e01d48848a261e2539387bc8/FLAGc8c009800 [2021-10-29 05:28:27,625 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:28:27,626 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/sv-benchmarks/c/float-newlib/float_req_bl_1251.c [2021-10-29 05:28:27,637 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/data/7110a7e5f/e7f127b3e01d48848a261e2539387bc8/FLAGc8c009800 [2021-10-29 05:28:27,969 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/data/7110a7e5f/e7f127b3e01d48848a261e2539387bc8 [2021-10-29 05:28:27,972 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:28:27,973 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:28:27,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:28:27,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:28:27,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:28:27,980 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:28:27" (1/1) ... [2021-10-29 05:28:27,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@300b3df8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:27, skipping insertion in model container [2021-10-29 05:28:27,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:28:27" (1/1) ... [2021-10-29 05:28:27,989 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:28:28,005 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:28:28,187 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_b572255f-578e-4805-89b8-a4e64b782395/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[1980,1993] [2021-10-29 05:28:28,191 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_b572255f-578e-4805-89b8-a4e64b782395/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[2139,2152] [2021-10-29 05:28:28,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:28:28,206 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:28:28,230 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_b572255f-578e-4805-89b8-a4e64b782395/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[1980,1993] [2021-10-29 05:28:28,232 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_b572255f-578e-4805-89b8-a4e64b782395/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[2139,2152] [2021-10-29 05:28:28,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:28:28,268 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:28:28,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:28 WrapperNode [2021-10-29 05:28:28,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:28:28,269 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:28:28,270 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:28:28,270 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:28:28,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:28" (1/1) ... [2021-10-29 05:28:28,311 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:28" (1/1) ... [2021-10-29 05:28:28,341 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:28:28,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:28:28,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:28:28,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:28:28,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:28" (1/1) ... [2021-10-29 05:28:28,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:28" (1/1) ... [2021-10-29 05:28:28,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:28" (1/1) ... [2021-10-29 05:28:28,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:28" (1/1) ... [2021-10-29 05:28:28,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:28" (1/1) ... [2021-10-29 05:28:28,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:28" (1/1) ... [2021-10-29 05:28:28,374 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:28" (1/1) ... [2021-10-29 05:28:28,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:28:28,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:28:28,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:28:28,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:28:28,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:28" (1/1) ... [2021-10-29 05:28:28,388 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:28:28,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:28:28,434 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:28:28,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:28:28,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-29 05:28:28,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:28:28,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-29 05:28:28,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:28:28,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:28:28,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2021-10-29 05:28:28,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-29 05:28:28,865 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:28:28,866 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2021-10-29 05:28:28,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:28:28 BoogieIcfgContainer [2021-10-29 05:28:28,868 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:28:28,870 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:28:28,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:28:28,873 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:28:28,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:28:27" (1/3) ... [2021-10-29 05:28:28,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a036044 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:28:28, skipping insertion in model container [2021-10-29 05:28:28,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:28:28" (2/3) ... [2021-10-29 05:28:28,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a036044 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:28:28, skipping insertion in model container [2021-10-29 05:28:28,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:28:28" (3/3) ... [2021-10-29 05:28:28,877 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1251.c [2021-10-29 05:28:28,883 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:28:28,883 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-29 05:28:28,933 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:28:28,939 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 05:28:28,954 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-29 05:28:28,975 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 46 states have internal predecessors, (69), 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 05:28:28,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-29 05:28:28,998 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:28:29,000 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:28:29,001 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:28:29,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:28:29,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1204154757, now seen corresponding path program 1 times [2021-10-29 05:28:29,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:28:29,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398574083] [2021-10-29 05:28:29,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:28:29,020 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:28:29,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:28:29,023 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:28:29,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-29 05:28:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:28:29,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-29 05:28:29,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:28:29,201 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 05:28:29,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:28:29,287 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 05:28:29,287 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:28:29,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [398574083] [2021-10-29 05:28:29,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [398574083] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:28:29,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:28:29,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-29 05:28:29,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343998585] [2021-10-29 05:28:29,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-29 05:28:29,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:28:29,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-29 05:28:29,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:28:29,342 INFO L87 Difference]: Start difference. First operand has 47 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 46 states have internal predecessors, (69), 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 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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 05:28:29,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:28:29,370 INFO L93 Difference]: Finished difference Result 82 states and 122 transitions. [2021-10-29 05:28:29,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-29 05:28:29,372 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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 05:28:29,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:28:29,383 INFO L225 Difference]: With dead ends: 82 [2021-10-29 05:28:29,383 INFO L226 Difference]: Without dead ends: 43 [2021-10-29 05:28:29,387 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 30 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 05:28:29,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-29 05:28:29,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-10-29 05:28:29,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 42 states have internal predecessors, (58), 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 05:28:29,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2021-10-29 05:28:29,432 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 16 [2021-10-29 05:28:29,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:28:29,433 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2021-10-29 05:28:29,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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 05:28:29,434 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2021-10-29 05:28:29,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-29 05:28:29,437 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:28:29,437 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:28:29,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-29 05:28:29,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:28:29,655 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:28:29,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:28:29,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1262247077, now seen corresponding path program 1 times [2021-10-29 05:28:29,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:28:29,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1684245475] [2021-10-29 05:28:29,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:28:29,666 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:28:29,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:28:29,667 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:28:29,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-29 05:28:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:28:29,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-29 05:28:29,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:28:29,888 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 05:28:29,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:28:29,954 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 05:28:29,955 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:28:29,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1684245475] [2021-10-29 05:28:29,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1684245475] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:28:29,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:28:29,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-29 05:28:29,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774020343] [2021-10-29 05:28:29,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:28:29,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:28:29,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:28:29,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:28:29,963 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 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 05:28:30,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:28:30,036 INFO L93 Difference]: Finished difference Result 82 states and 111 transitions. [2021-10-29 05:28:30,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 05:28:30,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 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) Word has length 17 [2021-10-29 05:28:30,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:28:30,040 INFO L225 Difference]: With dead ends: 82 [2021-10-29 05:28:30,040 INFO L226 Difference]: Without dead ends: 50 [2021-10-29 05:28:30,042 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:28:30,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-29 05:28:30,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2021-10-29 05:28:30,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 44 states have internal predecessors, (60), 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 05:28:30,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 60 transitions. [2021-10-29 05:28:30,061 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 60 transitions. Word has length 17 [2021-10-29 05:28:30,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:28:30,062 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 60 transitions. [2021-10-29 05:28:30,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 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 05:28:30,062 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 60 transitions. [2021-10-29 05:28:30,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-29 05:28:30,069 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:28:30,070 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 05:28:30,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-29 05:28:30,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:28:30,284 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:28:30,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:28:30,285 INFO L85 PathProgramCache]: Analyzing trace with hash 44236684, now seen corresponding path program 1 times [2021-10-29 05:28:30,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:28:30,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615445196] [2021-10-29 05:28:30,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:28:30,286 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:28:30,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:28:30,287 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:28:30,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-29 05:28:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:28:30,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-29 05:28:30,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:28:30,502 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 05:28:30,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:28:30,571 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 05:28:30,571 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:28:30,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1615445196] [2021-10-29 05:28:30,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1615445196] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:28:30,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:28:30,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-29 05:28:30,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949771779] [2021-10-29 05:28:30,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-29 05:28:30,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:28:30,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-29 05:28:30,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-29 05:28:30,576 INFO L87 Difference]: Start difference. First operand 45 states and 60 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 05:28:30,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:28:30,683 INFO L93 Difference]: Finished difference Result 96 states and 120 transitions. [2021-10-29 05:28:30,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-29 05:28:30,684 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 05:28:30,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:28:30,685 INFO L225 Difference]: With dead ends: 96 [2021-10-29 05:28:30,685 INFO L226 Difference]: Without dead ends: 83 [2021-10-29 05:28:30,686 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 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 05:28:30,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-29 05:28:30,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 47. [2021-10-29 05:28:30,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 46 states have internal predecessors, (62), 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 05:28:30,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2021-10-29 05:28:30,693 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 18 [2021-10-29 05:28:30,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:28:30,694 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2021-10-29 05:28:30,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 05:28:30,694 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2021-10-29 05:28:30,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-29 05:28:30,695 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:28:30,695 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] [2021-10-29 05:28:30,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-29 05:28:30,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:28:30,909 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:28:30,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:28:30,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1380709804, now seen corresponding path program 1 times [2021-10-29 05:28:30,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:28:30,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1476134661] [2021-10-29 05:28:30,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:28:30,911 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:28:30,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:28:30,912 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:28:30,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-29 05:28:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:28:31,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-29 05:28:31,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:28:31,294 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 05:28:31,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:28:31,440 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 05:28:31,440 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:28:31,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1476134661] [2021-10-29 05:28:31,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1476134661] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:28:31,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:28:31,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-10-29 05:28:31,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348935172] [2021-10-29 05:28:31,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-29 05:28:31,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:28:31,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-29 05:28:31,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-29 05:28:31,443 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 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 05:28:31,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:28:31,795 INFO L93 Difference]: Finished difference Result 149 states and 197 transitions. [2021-10-29 05:28:31,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-29 05:28:31,796 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 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) Word has length 21 [2021-10-29 05:28:31,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:28:31,798 INFO L225 Difference]: With dead ends: 149 [2021-10-29 05:28:31,798 INFO L226 Difference]: Without dead ends: 140 [2021-10-29 05:28:31,798 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-10-29 05:28:31,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-29 05:28:31,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 75. [2021-10-29 05:28:31,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.3972602739726028) internal successors, (102), 74 states have internal predecessors, (102), 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 05:28:31,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 102 transitions. [2021-10-29 05:28:31,810 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 102 transitions. Word has length 21 [2021-10-29 05:28:31,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:28:31,811 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 102 transitions. [2021-10-29 05:28:31,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 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 05:28:31,811 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 102 transitions. [2021-10-29 05:28:31,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-29 05:28:31,812 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:28:31,813 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 05:28:31,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-29 05:28:32,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:28:32,025 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:28:32,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:28:32,026 INFO L85 PathProgramCache]: Analyzing trace with hash 147544209, now seen corresponding path program 1 times [2021-10-29 05:28:32,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:28:32,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042632221] [2021-10-29 05:28:32,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:28:32,027 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:28:32,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:28:32,028 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:28:32,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-29 05:28:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:28:32,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-29 05:28:32,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:28:32,869 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 05:28:32,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:28:33,064 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 05:28:33,065 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:28:33,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042632221] [2021-10-29 05:28:33,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042632221] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:28:33,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:28:33,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 15 [2021-10-29 05:28:33,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432546526] [2021-10-29 05:28:33,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-29 05:28:33,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:28:33,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-29 05:28:33,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-10-29 05:28:33,067 INFO L87 Difference]: Start difference. First operand 75 states and 102 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 05:28:34,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:28:34,163 INFO L93 Difference]: Finished difference Result 180 states and 237 transitions. [2021-10-29 05:28:34,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-29 05:28:34,164 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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) Word has length 22 [2021-10-29 05:28:34,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:28:34,166 INFO L225 Difference]: With dead ends: 180 [2021-10-29 05:28:34,166 INFO L226 Difference]: Without dead ends: 178 [2021-10-29 05:28:34,167 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-10-29 05:28:34,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-10-29 05:28:34,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 89. [2021-10-29 05:28:34,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 87 states have (on average 1.3908045977011494) internal successors, (121), 88 states have internal predecessors, (121), 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 05:28:34,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 121 transitions. [2021-10-29 05:28:34,179 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 121 transitions. Word has length 22 [2021-10-29 05:28:34,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:28:34,180 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 121 transitions. [2021-10-29 05:28:34,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 05:28:34,180 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 121 transitions. [2021-10-29 05:28:34,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-29 05:28:34,182 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:28:34,182 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, 1] [2021-10-29 05:28:34,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-29 05:28:34,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:28:34,393 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:28:34,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:28:34,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1845695531, now seen corresponding path program 1 times [2021-10-29 05:28:34,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:28:34,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910745449] [2021-10-29 05:28:34,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:28:34,398 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:28:34,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:28:34,400 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:28:34,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-29 05:28:34,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:28:34,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-29 05:28:34,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:28:34,715 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 05:28:34,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:28:34,818 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 05:28:34,818 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:28:34,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910745449] [2021-10-29 05:28:34,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910745449] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:28:34,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:28:34,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-10-29 05:28:34,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400961619] [2021-10-29 05:28:34,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:28:34,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:28:34,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:28:34,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:28:34,820 INFO L87 Difference]: Start difference. First operand 89 states and 121 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 05:28:35,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:28:35,402 INFO L93 Difference]: Finished difference Result 166 states and 219 transitions. [2021-10-29 05:28:35,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-29 05:28:35,403 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) Word has length 23 [2021-10-29 05:28:35,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:28:35,404 INFO L225 Difference]: With dead ends: 166 [2021-10-29 05:28:35,404 INFO L226 Difference]: Without dead ends: 131 [2021-10-29 05:28:35,405 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-10-29 05:28:35,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-29 05:28:35,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 89. [2021-10-29 05:28:35,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 87 states have (on average 1.3793103448275863) internal successors, (120), 88 states have internal predecessors, (120), 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 05:28:35,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 120 transitions. [2021-10-29 05:28:35,419 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 120 transitions. Word has length 23 [2021-10-29 05:28:35,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:28:35,420 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 120 transitions. [2021-10-29 05:28:35,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 05:28:35,420 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 120 transitions. [2021-10-29 05:28:35,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-29 05:28:35,421 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:28:35,422 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, 1, 1] [2021-10-29 05:28:35,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-29 05:28:35,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:28:35,645 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:28:35,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:28:35,646 INFO L85 PathProgramCache]: Analyzing trace with hash 156888005, now seen corresponding path program 1 times [2021-10-29 05:28:35,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:28:35,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1541021965] [2021-10-29 05:28:35,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:28:35,646 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:28:35,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:28:35,647 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:28:35,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-29 05:28:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:28:35,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-29 05:28:35,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:28:35,855 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 05:28:35,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:28:35,922 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 05:28:35,922 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:28:35,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1541021965] [2021-10-29 05:28:35,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1541021965] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:28:35,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:28:35,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-29 05:28:35,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205722856] [2021-10-29 05:28:35,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-29 05:28:35,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:28:35,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-29 05:28:35,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-29 05:28:35,925 INFO L87 Difference]: Start difference. First operand 89 states and 120 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 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 05:28:36,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:28:36,050 INFO L93 Difference]: Finished difference Result 157 states and 199 transitions. [2021-10-29 05:28:36,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-29 05:28:36,050 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 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 24 [2021-10-29 05:28:36,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:28:36,052 INFO L225 Difference]: With dead ends: 157 [2021-10-29 05:28:36,052 INFO L226 Difference]: Without dead ends: 141 [2021-10-29 05:28:36,052 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 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 05:28:36,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-10-29 05:28:36,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 93. [2021-10-29 05:28:36,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 92 states have internal predecessors, (124), 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 05:28:36,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2021-10-29 05:28:36,063 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 124 transitions. Word has length 24 [2021-10-29 05:28:36,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:28:36,063 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 124 transitions. [2021-10-29 05:28:36,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 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 05:28:36,064 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 124 transitions. [2021-10-29 05:28:36,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-29 05:28:36,065 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:28:36,065 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, 1, 1] [2021-10-29 05:28:36,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-29 05:28:36,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:28:36,282 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:28:36,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:28:36,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1621213116, now seen corresponding path program 1 times [2021-10-29 05:28:36,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:28:36,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296047045] [2021-10-29 05:28:36,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:28:36,283 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:28:36,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:28:36,284 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:28:36,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-29 05:28:36,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:28:36,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-29 05:28:36,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:28:36,477 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 05:28:36,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:28:36,517 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 05:28:36,517 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:28:36,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296047045] [2021-10-29 05:28:36,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296047045] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:28:36,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:28:36,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-29 05:28:36,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018282895] [2021-10-29 05:28:36,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:28:36,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:28:36,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:28:36,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:28:36,519 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:28:36,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:28:36,543 INFO L93 Difference]: Finished difference Result 96 states and 127 transitions. [2021-10-29 05:28:36,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:28:36,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-29 05:28:36,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:28:36,545 INFO L225 Difference]: With dead ends: 96 [2021-10-29 05:28:36,545 INFO L226 Difference]: Without dead ends: 94 [2021-10-29 05:28:36,545 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:28:36,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-29 05:28:36,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-10-29 05:28:36,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 92 states have internal predecessors, (124), 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 05:28:36,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2021-10-29 05:28:36,554 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 124 transitions. Word has length 24 [2021-10-29 05:28:36,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:28:36,555 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 124 transitions. [2021-10-29 05:28:36,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:28:36,555 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 124 transitions. [2021-10-29 05:28:36,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-29 05:28:36,556 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:28:36,556 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, 1, 1, 1] [2021-10-29 05:28:36,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-29 05:28:36,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:28:36,770 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:28:36,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:28:36,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1741974657, now seen corresponding path program 1 times [2021-10-29 05:28:36,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:28:36,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653852656] [2021-10-29 05:28:36,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:28:36,771 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:28:36,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:28:36,771 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:28:36,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-29 05:28:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:28:36,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-29 05:28:36,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:28:37,107 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 05:28:37,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:28:37,236 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 05:28:37,236 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:28:37,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653852656] [2021-10-29 05:28:37,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1653852656] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:28:37,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:28:37,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-10-29 05:28:37,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293305249] [2021-10-29 05:28:37,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-29 05:28:37,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:28:37,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-29 05:28:37,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-29 05:28:37,238 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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 05:28:37,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:28:37,790 INFO L93 Difference]: Finished difference Result 131 states and 173 transitions. [2021-10-29 05:28:37,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-29 05:28:37,790 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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 25 [2021-10-29 05:28:37,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:28:37,791 INFO L225 Difference]: With dead ends: 131 [2021-10-29 05:28:37,791 INFO L226 Difference]: Without dead ends: 118 [2021-10-29 05:28:37,792 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-10-29 05:28:37,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-29 05:28:37,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 89. [2021-10-29 05:28:37,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 87 states have (on average 1.3563218390804597) internal successors, (118), 88 states have internal predecessors, (118), 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 05:28:37,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 118 transitions. [2021-10-29 05:28:37,800 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 118 transitions. Word has length 25 [2021-10-29 05:28:37,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:28:37,800 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 118 transitions. [2021-10-29 05:28:37,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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 05:28:37,801 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 118 transitions. [2021-10-29 05:28:37,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-29 05:28:37,801 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:28:37,802 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, 1, 1, 1] [2021-10-29 05:28:37,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-29 05:28:38,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:28:38,013 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:28:38,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:28:38,013 INFO L85 PathProgramCache]: Analyzing trace with hash 839729769, now seen corresponding path program 1 times [2021-10-29 05:28:38,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:28:38,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038198728] [2021-10-29 05:28:38,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:28:38,014 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:28:38,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:28:38,015 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:28:38,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-29 05:28:38,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:28:38,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-29 05:28:38,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:28:38,384 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 05:28:38,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:28:38,523 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 05:28:38,524 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:28:38,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038198728] [2021-10-29 05:28:38,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038198728] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:28:38,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:28:38,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 11 [2021-10-29 05:28:38,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484371057] [2021-10-29 05:28:38,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-29 05:28:38,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:28:38,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-29 05:28:38,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-29 05:28:38,526 INFO L87 Difference]: Start difference. First operand 89 states and 118 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 05:28:39,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:28:39,039 INFO L93 Difference]: Finished difference Result 114 states and 147 transitions. [2021-10-29 05:28:39,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-29 05:28:39,039 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 25 [2021-10-29 05:28:39,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:28:39,040 INFO L225 Difference]: With dead ends: 114 [2021-10-29 05:28:39,040 INFO L226 Difference]: Without dead ends: 78 [2021-10-29 05:28:39,041 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-10-29 05:28:39,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-29 05:28:39,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2021-10-29 05:28:39,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 74 states have (on average 1.3243243243243243) internal successors, (98), 75 states have internal predecessors, (98), 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 05:28:39,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2021-10-29 05:28:39,047 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 25 [2021-10-29 05:28:39,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:28:39,047 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2021-10-29 05:28:39,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 05:28:39,048 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2021-10-29 05:28:39,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-29 05:28:39,048 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:28:39,049 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, 1, 1, 1] [2021-10-29 05:28:39,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-10-29 05:28:39,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:28:39,262 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:28:39,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:28:39,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1281876129, now seen corresponding path program 1 times [2021-10-29 05:28:39,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:28:39,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072473540] [2021-10-29 05:28:39,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:28:39,263 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:28:39,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:28:39,264 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:28:39,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-29 05:28:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:28:39,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-29 05:28:39,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:28:39,664 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 05:28:39,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:28:39,786 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 05:28:39,787 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:28:39,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072473540] [2021-10-29 05:28:39,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072473540] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:28:39,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:28:39,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-10-29 05:28:39,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867051008] [2021-10-29 05:28:39,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:28:39,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:28:39,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:28:39,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:28:39,789 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 05:28:40,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:28:40,064 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2021-10-29 05:28:40,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-29 05:28:40,065 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) Word has length 25 [2021-10-29 05:28:40,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:28:40,066 INFO L225 Difference]: With dead ends: 84 [2021-10-29 05:28:40,066 INFO L226 Difference]: Without dead ends: 74 [2021-10-29 05:28:40,067 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-10-29 05:28:40,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-29 05:28:40,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-10-29 05:28:40,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 72 states have (on average 1.3055555555555556) internal successors, (94), 73 states have internal predecessors, (94), 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 05:28:40,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2021-10-29 05:28:40,073 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 25 [2021-10-29 05:28:40,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:28:40,073 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2021-10-29 05:28:40,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 05:28:40,073 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2021-10-29 05:28:40,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:28:40,074 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:28:40,074 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, 1, 1, 1, 1] [2021-10-29 05:28:40,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-29 05:28:40,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:28:40,288 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:28:40,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:28:40,288 INFO L85 PathProgramCache]: Analyzing trace with hash -144403189, now seen corresponding path program 1 times [2021-10-29 05:28:40,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:28:40,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592580911] [2021-10-29 05:28:40,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:28:40,289 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:28:40,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:28:40,290 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:28:40,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-29 05:28:40,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:28:40,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-29 05:28:40,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:28:40,644 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 05:28:40,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:28:41,094 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 05:28:41,094 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:28:41,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592580911] [2021-10-29 05:28:41,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592580911] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:28:41,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:28:41,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-10-29 05:28:41,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821002073] [2021-10-29 05:28:41,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-29 05:28:41,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:28:41,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-29 05:28:41,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-29 05:28:41,096 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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 05:28:41,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:28:41,397 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2021-10-29 05:28:41,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-29 05:28:41,397 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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 26 [2021-10-29 05:28:41,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:28:41,398 INFO L225 Difference]: With dead ends: 82 [2021-10-29 05:28:41,398 INFO L226 Difference]: Without dead ends: 74 [2021-10-29 05:28:41,399 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-10-29 05:28:41,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-29 05:28:41,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-10-29 05:28:41,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 72 states have (on average 1.2916666666666667) internal successors, (93), 73 states have internal predecessors, (93), 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 05:28:41,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2021-10-29 05:28:41,405 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 26 [2021-10-29 05:28:41,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:28:41,405 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2021-10-29 05:28:41,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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 05:28:41,405 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2021-10-29 05:28:41,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-29 05:28:41,406 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:28:41,406 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, 1, 1, 1, 1] [2021-10-29 05:28:41,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-29 05:28:41,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:28:41,620 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:28:41,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:28:41,620 INFO L85 PathProgramCache]: Analyzing trace with hash -953749815, now seen corresponding path program 1 times [2021-10-29 05:28:41,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:28:41,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1184590254] [2021-10-29 05:28:41,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:28:41,621 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:28:41,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:28:41,622 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:28:41,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-29 05:28:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:28:41,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-29 05:28:41,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:28:42,289 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 05:28:42,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:28:42,658 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 05:28:42,658 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:28:42,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1184590254] [2021-10-29 05:28:42,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1184590254] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:28:42,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:28:42,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 16 [2021-10-29 05:28:42,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305208441] [2021-10-29 05:28:42,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-29 05:28:42,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:28:42,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-29 05:28:42,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-10-29 05:28:42,661 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 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 05:28:45,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:28:45,702 INFO L93 Difference]: Finished difference Result 154 states and 169 transitions. [2021-10-29 05:28:45,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-29 05:28:45,703 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 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 26 [2021-10-29 05:28:45,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:28:45,704 INFO L225 Difference]: With dead ends: 154 [2021-10-29 05:28:45,704 INFO L226 Difference]: Without dead ends: 134 [2021-10-29 05:28:45,705 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=464, Unknown=0, NotChecked=0, Total=650 [2021-10-29 05:28:45,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-29 05:28:45,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 72. [2021-10-29 05:28:45,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 71 states have internal predecessors, (87), 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 05:28:45,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2021-10-29 05:28:45,712 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 26 [2021-10-29 05:28:45,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:28:45,712 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2021-10-29 05:28:45,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 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 05:28:45,712 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2021-10-29 05:28:45,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-29 05:28:45,713 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:28:45,713 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, 1, 1, 1, 1, 1] [2021-10-29 05:28:45,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-29 05:28:45,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:28:45,927 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:28:45,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:28:45,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1548503636, now seen corresponding path program 1 times [2021-10-29 05:28:45,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:28:45,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764913924] [2021-10-29 05:28:45,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:28:45,928 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:28:45,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:28:45,930 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:28:45,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-29 05:28:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:28:46,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-29 05:28:46,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:28:46,705 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 05:28:46,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:28:47,019 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 05:28:47,019 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:28:47,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764913924] [2021-10-29 05:28:47,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764913924] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:28:47,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:28:47,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 12] imperfect sequences [] total 15 [2021-10-29 05:28:47,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134327978] [2021-10-29 05:28:47,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-29 05:28:47,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:28:47,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-29 05:28:47,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-10-29 05:28:47,021 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 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 05:28:48,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:28:48,953 INFO L93 Difference]: Finished difference Result 195 states and 205 transitions. [2021-10-29 05:28:48,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-29 05:28:48,953 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 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 27 [2021-10-29 05:28:48,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:28:48,954 INFO L225 Difference]: With dead ends: 195 [2021-10-29 05:28:48,954 INFO L226 Difference]: Without dead ends: 158 [2021-10-29 05:28:48,956 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=455, Invalid=1437, Unknown=0, NotChecked=0, Total=1892 [2021-10-29 05:28:48,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-10-29 05:28:48,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 43. [2021-10-29 05:28:48,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 42 states have internal predecessors, (53), 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 05:28:48,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2021-10-29 05:28:48,962 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 27 [2021-10-29 05:28:48,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:28:48,963 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2021-10-29 05:28:48,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 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 05:28:48,963 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2021-10-29 05:28:48,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-29 05:28:48,964 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:28:48,964 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, 1, 1, 1, 1, 1, 1] [2021-10-29 05:28:48,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-29 05:28:49,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:28:49,174 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:28:49,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:28:49,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1364791880, now seen corresponding path program 1 times [2021-10-29 05:28:49,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:28:49,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [730835790] [2021-10-29 05:28:49,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:28:49,175 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:28:49,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:28:49,176 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:28:49,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-29 05:28:49,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:28:49,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-29 05:28:49,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:28:49,829 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 05:28:49,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:28:50,095 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 05:28:50,095 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:28:50,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [730835790] [2021-10-29 05:28:50,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [730835790] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:28:50,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:28:50,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 12 [2021-10-29 05:28:50,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251080181] [2021-10-29 05:28:50,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-29 05:28:50,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:28:50,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-29 05:28:50,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-29 05:28:50,097 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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 05:28:51,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:28:51,190 INFO L93 Difference]: Finished difference Result 125 states and 140 transitions. [2021-10-29 05:28:51,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-29 05:28:51,191 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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 28 [2021-10-29 05:28:51,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:28:51,192 INFO L225 Difference]: With dead ends: 125 [2021-10-29 05:28:51,192 INFO L226 Difference]: Without dead ends: 101 [2021-10-29 05:28:51,193 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2021-10-29 05:28:51,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-29 05:28:51,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 41. [2021-10-29 05:28:51,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.225) internal successors, (49), 40 states have internal predecessors, (49), 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 05:28:51,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-10-29 05:28:51,198 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 28 [2021-10-29 05:28:51,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:28:51,199 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-10-29 05:28:51,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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 05:28:51,199 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-10-29 05:28:51,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-29 05:28:51,200 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:28:51,200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:28:51,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-29 05:28:51,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:28:51,414 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:28:51,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:28:51,414 INFO L85 PathProgramCache]: Analyzing trace with hash 430789518, now seen corresponding path program 1 times [2021-10-29 05:28:51,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:28:51,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558695551] [2021-10-29 05:28:51,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:28:51,415 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:28:51,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:28:51,416 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:28:51,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-29 05:28:51,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:28:51,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-29 05:28:51,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:28:51,910 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 05:28:51,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:28:52,383 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 05:28:52,383 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:28:52,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558695551] [2021-10-29 05:28:52,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558695551] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:28:52,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:28:52,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-10-29 05:28:52,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058486445] [2021-10-29 05:28:52,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-29 05:28:52,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:28:52,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-29 05:28:52,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-29 05:28:52,386 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 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 05:28:53,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:28:53,050 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2021-10-29 05:28:53,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-29 05:28:53,051 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 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 32 [2021-10-29 05:28:53,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:28:53,051 INFO L225 Difference]: With dead ends: 52 [2021-10-29 05:28:53,051 INFO L226 Difference]: Without dead ends: 41 [2021-10-29 05:28:53,052 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-10-29 05:28:53,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-29 05:28:53,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-10-29 05:28:53,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.2) internal successors, (48), 40 states have internal predecessors, (48), 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 05:28:53,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-10-29 05:28:53,056 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 32 [2021-10-29 05:28:53,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:28:53,056 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-10-29 05:28:53,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 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 05:28:53,056 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-10-29 05:28:53,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-29 05:28:53,056 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:28:53,057 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:28:53,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-29 05:28:53,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:28:53,257 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:28:53,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:28:53,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1131854096, now seen corresponding path program 1 times [2021-10-29 05:28:53,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:28:53,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632220540] [2021-10-29 05:28:53,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:28:53,259 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:28:53,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:28:53,260 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:28:53,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-29 05:28:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:28:53,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-29 05:28:53,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:28:53,804 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 05:28:53,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:28:54,103 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 05:28:54,103 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:28:54,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632220540] [2021-10-29 05:28:54,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632220540] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:28:54,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:28:54,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2021-10-29 05:28:54,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497658499] [2021-10-29 05:28:54,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-29 05:28:54,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:28:54,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-29 05:28:54,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-10-29 05:28:54,106 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 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 05:28:54,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:28:54,731 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-10-29 05:28:54,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-29 05:28:54,732 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 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 32 [2021-10-29 05:28:54,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:28:54,733 INFO L225 Difference]: With dead ends: 55 [2021-10-29 05:28:54,733 INFO L226 Difference]: Without dead ends: 41 [2021-10-29 05:28:54,733 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-10-29 05:28:54,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-29 05:28:54,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-10-29 05:28:54,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 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 05:28:54,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-10-29 05:28:54,738 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 32 [2021-10-29 05:28:54,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:28:54,738 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-10-29 05:28:54,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 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 05:28:54,738 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-10-29 05:28:54,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-29 05:28:54,739 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:28:54,739 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:28:54,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-29 05:28:54,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:28:54,954 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:28:54,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:28:54,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1713269395, now seen corresponding path program 1 times [2021-10-29 05:28:54,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:28:54,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167629501] [2021-10-29 05:28:54,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:28:54,955 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:28:54,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:28:54,956 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:28:54,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-29 05:28:55,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:28:55,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-29 05:28:55,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:28:55,934 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 05:28:55,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:28:56,169 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 05:28:56,169 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:28:56,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167629501] [2021-10-29 05:28:56,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167629501] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:28:56,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:28:56,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-10-29 05:28:56,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463621863] [2021-10-29 05:28:56,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-29 05:28:56,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:28:56,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-29 05:28:56,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-10-29 05:28:56,172 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 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 05:28:56,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:28:56,820 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2021-10-29 05:28:56,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-29 05:28:56,820 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 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 33 [2021-10-29 05:28:56,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:28:56,821 INFO L225 Difference]: With dead ends: 79 [2021-10-29 05:28:56,821 INFO L226 Difference]: Without dead ends: 61 [2021-10-29 05:28:56,821 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-10-29 05:28:56,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-29 05:28:56,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 39. [2021-10-29 05:28:56,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 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 05:28:56,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-10-29 05:28:56,827 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 33 [2021-10-29 05:28:56,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:28:56,828 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-10-29 05:28:56,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 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 05:28:56,828 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-10-29 05:28:56,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-29 05:28:56,828 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:28:56,829 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:28:56,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-10-29 05:28:57,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:28:57,043 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:28:57,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:28:57,044 INFO L85 PathProgramCache]: Analyzing trace with hash 739407273, now seen corresponding path program 1 times [2021-10-29 05:28:57,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:28:57,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771566147] [2021-10-29 05:28:57,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:28:57,044 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:28:57,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:28:57,045 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:28:57,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-29 05:28:57,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:28:57,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-29 05:28:57,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:28:57,470 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 05:28:57,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:28:57,532 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 05:28:57,532 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:28:57,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771566147] [2021-10-29 05:28:57,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771566147] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:28:57,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:28:57,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-29 05:28:57,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701667204] [2021-10-29 05:28:57,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:28:57,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:28:57,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:28:57,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:28:57,534 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 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 05:28:57,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:28:57,563 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-10-29 05:28:57,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:28:57,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 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) Word has length 35 [2021-10-29 05:28:57,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:28:57,564 INFO L225 Difference]: With dead ends: 39 [2021-10-29 05:28:57,564 INFO L226 Difference]: Without dead ends: 0 [2021-10-29 05:28:57,564 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:28:57,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-29 05:28:57,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-29 05:28:57,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:28:57,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-29 05:28:57,565 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2021-10-29 05:28:57,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:28:57,566 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-29 05:28:57,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 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 05:28:57,566 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-29 05:28:57,566 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-29 05:28:57,569 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:28:57,569 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:28:57,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-29 05:28:57,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:28:57,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-29 05:28:57,787 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:28:57,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:28:58,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:28:58,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:28:58,186 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:28:58,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:28:58,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:28:58,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:28:58,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:28:58,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:28:58,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:28:58,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:28:58,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:28:58,451 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:29:03,148 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 82) no Hoare annotation was computed. [2021-10-29 05:29:03,148 INFO L857 garLoopResultBuilder]: For program point L69(line 69) no Hoare annotation was computed. [2021-10-29 05:29:03,148 INFO L857 garLoopResultBuilder]: For program point L36(lines 36 42) no Hoare annotation was computed. [2021-10-29 05:29:03,148 INFO L857 garLoopResultBuilder]: For program point L69-2(line 69) no Hoare annotation was computed. [2021-10-29 05:29:03,148 INFO L857 garLoopResultBuilder]: For program point L36-1(lines 36 42) no Hoare annotation was computed. [2021-10-29 05:29:03,148 INFO L857 garLoopResultBuilder]: For program point L69-3(lines 69 70) no Hoare annotation was computed. [2021-10-29 05:29:03,148 INFO L857 garLoopResultBuilder]: For program point L69-5(lines 69 85) no Hoare annotation was computed. [2021-10-29 05:29:03,149 INFO L857 garLoopResultBuilder]: For program point L69-7(lines 69 85) no Hoare annotation was computed. [2021-10-29 05:29:03,149 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-29 05:29:03,149 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-29 05:29:03,149 INFO L857 garLoopResultBuilder]: For program point L53(line 53) no Hoare annotation was computed. [2021-10-29 05:29:03,149 INFO L857 garLoopResultBuilder]: For program point L53-2(line 53) no Hoare annotation was computed. [2021-10-29 05:29:03,150 INFO L853 garLoopResultBuilder]: At program point L53-3(lines 45 54) the Hoare annotation is: (let ((.cse1 (not (fp.eq ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~x~0))) (.cse0 (= ULTIMATE.start_fmax_float_~y ULTIMATE.start_main_~y~0)) (.cse2 (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)))) (or (and (= (_ bv0 32) |ULTIMATE.start_isnan_float_#res|) (fp.eq ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0) .cse0 (= ULTIMATE.start_main_~y~0 |ULTIMATE.start_fmax_float_#res|) .cse1) (and .cse0 (not (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_fmax_float_~x)) (= ULTIMATE.start_fmax_float_~y .cse2) (= ULTIMATE.start_fmax_float_~y ULTIMATE.start___fpclassify_float_~x) .cse1 (fp.eq |ULTIMATE.start_fmax_float_#res| ULTIMATE.start_main_~y~0)) (and (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y)) (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_main_~x~0) .cse0 (not (fp.eq ULTIMATE.start___fpclassify_float_~x ULTIMATE.start___fpclassify_float_~x)) (not (fp.eq .cse2 .cse2)) (= (_ bv1 32) |ULTIMATE.start_isnan_float_#res|) (fp.eq |ULTIMATE.start_fmax_float_#res| ULTIMATE.start_main_~x~0)))) [2021-10-29 05:29:03,150 INFO L857 garLoopResultBuilder]: For program point L70(line 70) no Hoare annotation was computed. [2021-10-29 05:29:03,150 INFO L857 garLoopResultBuilder]: For program point L70-2(line 70) no Hoare annotation was computed. [2021-10-29 05:29:03,150 INFO L860 garLoopResultBuilder]: At program point L87(lines 59 88) the Hoare annotation is: true [2021-10-29 05:29:03,150 INFO L857 garLoopResultBuilder]: For program point L46(lines 46 48) no Hoare annotation was computed. [2021-10-29 05:29:03,150 INFO L857 garLoopResultBuilder]: For program point L39(lines 39 42) no Hoare annotation was computed. [2021-10-29 05:29:03,151 INFO L857 garLoopResultBuilder]: For program point L39-1(lines 39 42) no Hoare annotation was computed. [2021-10-29 05:29:03,151 INFO L857 garLoopResultBuilder]: For program point L81(line 81) no Hoare annotation was computed. [2021-10-29 05:29:03,151 INFO L857 garLoopResultBuilder]: For program point L81-2(lines 81 84) no Hoare annotation was computed. [2021-10-29 05:29:03,151 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-29 05:29:03,151 INFO L853 garLoopResultBuilder]: At program point L57(line 57) the Hoare annotation is: (let ((.cse0 (fp.eq ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~x~0))) (or (and (= (_ bv0 32) |ULTIMATE.start_isnan_float_#res|) .cse0) (and (not .cse0) (= (_ bv1 32) |ULTIMATE.start_isnan_float_#res|)))) [2021-10-29 05:29:03,152 INFO L853 garLoopResultBuilder]: At program point L57-1(line 57) the Hoare annotation is: (and |ULTIMATE.start_main_#t~short15| (let ((.cse0 (fp.eq ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0))) (or (and (not .cse0) (= (_ bv1 32) |ULTIMATE.start_isnan_float_#res|)) (and (= (_ bv0 32) |ULTIMATE.start_isnan_float_#res|) .cse0))) (not (fp.eq ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~x~0))) [2021-10-29 05:29:03,152 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 76) no Hoare annotation was computed. [2021-10-29 05:29:03,152 INFO L853 garLoopResultBuilder]: At program point L57-2(line 57) the Hoare annotation is: (let ((.cse0 (not |ULTIMATE.start_main_#t~short19|)) (.cse1 (not |ULTIMATE.start_main_#t~short15|)) (.cse2 (fp.eq ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~x~0))) (or (and (not (fp.eq ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0)) .cse0 .cse1 (not .cse2) (= (_ bv1 32) |ULTIMATE.start_isnan_float_#res|)) (and (= (_ bv0 32) |ULTIMATE.start_isnan_float_#res|) .cse0 .cse1 .cse2))) [2021-10-29 05:29:03,152 INFO L853 garLoopResultBuilder]: At program point L57-3(line 57) the Hoare annotation is: (and |ULTIMATE.start_main_#t~short18| (let ((.cse0 (fp.eq ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0))) (or (and (not .cse0) (= (_ bv1 32) |ULTIMATE.start_isnan_float_#res|)) (and (= (_ bv0 32) |ULTIMATE.start_isnan_float_#res|) .cse0))) (not |ULTIMATE.start_main_#t~short19|) (not |ULTIMATE.start_main_#t~short15|) (fp.eq ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~x~0)) [2021-10-29 05:29:03,152 INFO L853 garLoopResultBuilder]: At program point L57-4(line 57) the Hoare annotation is: (let ((.cse2 (not (fp.eq ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~x~0))) (.cse3 (= (_ bv1 32) |ULTIMATE.start_isnan_float_#res|)) (.cse0 (= ULTIMATE.start_fmax_float_~y ULTIMATE.start_main_~y~0)) (.cse1 (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)))) (or (and (fp.eq ULTIMATE.start_main_~res~0 ULTIMATE.start_main_~y~0) .cse0 (not (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_fmax_float_~x)) (= ULTIMATE.start_fmax_float_~y .cse1) (= ULTIMATE.start_fmax_float_~y ULTIMATE.start___fpclassify_float_~x) .cse2 .cse3 (fp.eq |ULTIMATE.start_fmax_float_#res| ULTIMATE.start_main_~y~0)) (and (fp.eq ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0) .cse0 (= ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~res~0) (= ULTIMATE.start_main_~y~0 |ULTIMATE.start_fmax_float_#res|) .cse2 .cse3) (and (= (_ bv0 32) |ULTIMATE.start_isnan_float_#res|) (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y)) (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_main_~x~0) .cse0 (not (fp.eq ULTIMATE.start___fpclassify_float_~x ULTIMATE.start___fpclassify_float_~x)) (fp.eq ULTIMATE.start_main_~res~0 ULTIMATE.start_main_~x~0) (not (fp.eq .cse1 .cse1)) (fp.eq |ULTIMATE.start_fmax_float_#res| ULTIMATE.start_main_~x~0)))) [2021-10-29 05:29:03,152 INFO L853 garLoopResultBuilder]: At program point L57-5(line 57) the Hoare annotation is: (let ((.cse0 (= (_ bv0 32) |ULTIMATE.start_isnan_float_#res|)) (.cse1 (= ULTIMATE.start_fmax_float_~y ULTIMATE.start_main_~y~0)) (.cse2 (not (fp.eq ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~x~0)))) (or (and |ULTIMATE.start_main_#t~short23| (fp.eq ULTIMATE.start_main_~res~0 ULTIMATE.start_main_~y~0) .cse0 .cse1 (not (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_fmax_float_~x)) (= ULTIMATE.start_fmax_float_~y (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0))) (= ULTIMATE.start_fmax_float_~y ULTIMATE.start___fpclassify_float_~x) .cse2 (fp.eq |ULTIMATE.start_fmax_float_#res| ULTIMATE.start_main_~y~0)) (and |ULTIMATE.start_main_#t~short23| .cse0 (fp.eq ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0) .cse1 (= ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~res~0) (= ULTIMATE.start_main_~y~0 |ULTIMATE.start_fmax_float_#res|) .cse2))) [2021-10-29 05:29:03,152 INFO L853 garLoopResultBuilder]: At program point L57-6(line 57) the Hoare annotation is: (or (and (not (fp.eq ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~x~0)) (= (_ bv1 32) |ULTIMATE.start_isnan_float_#res|)) (and (= (_ bv0 32) |ULTIMATE.start_isnan_float_#res|) (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y)) (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_main_~x~0) (= ULTIMATE.start_fmax_float_~y ULTIMATE.start_main_~y~0) (not (fp.eq ULTIMATE.start___fpclassify_float_~x ULTIMATE.start___fpclassify_float_~x)) (fp.eq ULTIMATE.start_main_~res~0 ULTIMATE.start_main_~x~0) (not (let ((.cse0 (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)))) (fp.eq .cse0 .cse0))) (fp.eq |ULTIMATE.start_fmax_float_#res| ULTIMATE.start_main_~x~0))) [2021-10-29 05:29:03,152 INFO L853 garLoopResultBuilder]: At program point L57-7(line 57) the Hoare annotation is: (and (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y)) (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_main_~x~0) (= ULTIMATE.start_fmax_float_~y ULTIMATE.start_main_~y~0) (not (fp.eq ULTIMATE.start___fpclassify_float_~x ULTIMATE.start___fpclassify_float_~x)) (fp.eq ULTIMATE.start_main_~res~0 ULTIMATE.start_main_~x~0) (not (let ((.cse0 (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)))) (fp.eq .cse0 .cse0))) (= (_ bv1 32) |ULTIMATE.start_isnan_float_#res|) (fp.eq |ULTIMATE.start_fmax_float_#res| ULTIMATE.start_main_~x~0)) [2021-10-29 05:29:03,152 INFO L857 garLoopResultBuilder]: For program point L82(line 82) no Hoare annotation was computed. [2021-10-29 05:29:03,153 INFO L857 garLoopResultBuilder]: For program point L33(lines 33 42) no Hoare annotation was computed. [2021-10-29 05:29:03,153 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-29 05:29:03,153 INFO L857 garLoopResultBuilder]: For program point L33-1(lines 33 42) no Hoare annotation was computed. [2021-10-29 05:29:03,153 INFO L857 garLoopResultBuilder]: For program point L25-1(lines 25 29) no Hoare annotation was computed. [2021-10-29 05:29:03,153 INFO L853 garLoopResultBuilder]: At program point L25-2(lines 25 29) the Hoare annotation is: (let ((.cse1 (= ULTIMATE.start_fmax_float_~y ULTIMATE.start_main_~y~0)) (.cse0 (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y)) (.cse2 (fp.eq ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~x~0))) (or (and (= ULTIMATE.start_fmax_float_~x ULTIMATE.start_main_~x~0) (not .cse0) .cse1 (= ULTIMATE.start_fmax_float_~x ULTIMATE.start___fpclassify_float_~x) .cse2 (= (_ bv1 32) |ULTIMATE.start_isnan_float_#res|)) (and (= (_ bv0 32) |ULTIMATE.start_isnan_float_#res|) .cse1 (not (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_fmax_float_~x)) .cse0 (not .cse2)))) [2021-10-29 05:29:03,153 INFO L857 garLoopResultBuilder]: For program point L25-3(lines 22 43) no Hoare annotation was computed. [2021-10-29 05:29:03,153 INFO L857 garLoopResultBuilder]: For program point L25-5(lines 25 29) no Hoare annotation was computed. [2021-10-29 05:29:03,153 INFO L853 garLoopResultBuilder]: At program point L25-6(lines 25 29) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_fmax_float_~y ULTIMATE.start_main_~y~0)) (.cse1 (= ULTIMATE.start_fmax_float_~y ULTIMATE.start___fpclassify_float_~x))) (or (and (= (_ bv0 32) |ULTIMATE.start_isnan_float_#res|) .cse0 (not (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_fmax_float_~x)) (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y) .cse1 (not (fp.eq ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~x~0))) (and (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_main_~x~0) .cse0 (not (fp.eq ULTIMATE.start___fpclassify_float_~x ULTIMATE.start___fpclassify_float_~x)) .cse1 (= (_ bv1 32) |ULTIMATE.start_isnan_float_#res|)))) [2021-10-29 05:29:03,153 INFO L857 garLoopResultBuilder]: For program point L25-7(lines 22 43) no Hoare annotation was computed. [2021-10-29 05:29:03,153 INFO L857 garLoopResultBuilder]: For program point L50(lines 50 52) no Hoare annotation was computed. [2021-10-29 05:29:03,153 INFO L857 garLoopResultBuilder]: For program point L75(line 75) no Hoare annotation was computed. [2021-10-29 05:29:03,153 INFO L853 garLoopResultBuilder]: At program point L42(lines 22 43) the Hoare annotation is: (let ((.cse1 (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y)) (.cse0 (= ULTIMATE.start_fmax_float_~y ULTIMATE.start_main_~y~0)) (.cse2 (fp.eq ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~x~0))) (or (and (= (_ bv0 32) |ULTIMATE.start_isnan_float_#res|) .cse0 (not (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_fmax_float_~x)) .cse1 (not .cse2)) (and (= ULTIMATE.start_fmax_float_~x ULTIMATE.start_main_~x~0) (not .cse1) .cse0 (= ULTIMATE.start_fmax_float_~x ULTIMATE.start___fpclassify_float_~x) .cse2 (= (_ bv1 32) |ULTIMATE.start_isnan_float_#res|) (not (= (_ bv0 32) |ULTIMATE.start___fpclassify_float_#res|)) (= ULTIMATE.start_fmax_float_~x (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)))))) [2021-10-29 05:29:03,154 INFO L853 garLoopResultBuilder]: At program point L42-1(lines 22 43) the Hoare annotation is: (let ((.cse2 (fp ((_ extract 31 31) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 30 23) ULTIMATE.start___fpclassify_float_~w~0) ((_ extract 22 0) ULTIMATE.start___fpclassify_float_~w~0)))) (let ((.cse1 (= ULTIMATE.start_fmax_float_~y ULTIMATE.start_main_~y~0)) (.cse3 (= ULTIMATE.start_fmax_float_~y .cse2)) (.cse4 (= ULTIMATE.start_fmax_float_~y ULTIMATE.start___fpclassify_float_~x)) (.cse0 (= (_ bv0 32) |ULTIMATE.start___fpclassify_float_#res|))) (or (and .cse0 (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_main_~x~0) .cse1 (not (fp.eq .cse2 .cse2)) .cse3 .cse4 (= (_ bv1 32) |ULTIMATE.start_isnan_float_#res|)) (and .cse1 (not (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_fmax_float_~x)) .cse3 (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_main_~y~0) .cse4 (not (fp.eq ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~x~0)) (not .cse0))))) [2021-10-29 05:29:03,155 INFO L857 garLoopResultBuilder]: For program point L75-2(lines 75 78) no Hoare annotation was computed. [2021-10-29 05:29:03,155 INFO L857 garLoopResultBuilder]: For program point L76(line 76) no Hoare annotation was computed. [2021-10-29 05:29:03,165 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:29:03,167 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:29:03,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:29:03 BoogieIcfgContainer [2021-10-29 05:29:03,238 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:29:03,238 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:29:03,239 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:29:03,239 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:29:03,239 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:28:28" (3/4) ... [2021-10-29 05:29:03,242 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-29 05:29:03,261 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 22 nodes and edges [2021-10-29 05:29:03,264 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-29 05:29:03,265 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-29 05:29:03,265 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-29 05:29:03,299 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (0bv32 == \result && ~fp.eq~FLOAT(x, x)) || (!~fp.eq~FLOAT(x, x) && 1bv32 == \result) [2021-10-29 05:29:03,300 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (aux-isnan_float(x) && !isnan_float(y)-aux && ((!~fp.eq~FLOAT(y, y) && 1bv32 == \result) || (0bv32 == \result && ~fp.eq~FLOAT(y, y)))) && !~fp.eq~FLOAT(x, x) [2021-10-29 05:29:03,300 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((!~fp.eq~FLOAT(y, y) && !aux-(isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y))-aux) && !aux-isnan_float(x) && !isnan_float(y)-aux) && !~fp.eq~FLOAT(x, x)) && 1bv32 == \result) || (((0bv32 == \result && !aux-(isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y))-aux) && !aux-isnan_float(x) && !isnan_float(y)-aux) && ~fp.eq~FLOAT(x, x)) [2021-10-29 05:29:03,301 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((aux-!isnan_float(x) && isnan_float(y)-aux && ((!~fp.eq~FLOAT(y, y) && 1bv32 == \result) || (0bv32 == \result && ~fp.eq~FLOAT(y, y)))) && !aux-(isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y))-aux) && !aux-isnan_float(x) && !isnan_float(y)-aux) && ~fp.eq~FLOAT(x, x) [2021-10-29 05:29:03,301 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((x == x && !~fp.eq~FLOAT(y, y)) && y == y) && x == x) && ~fp.eq~FLOAT(x, x)) && 1bv32 == \result) || ((((0bv32 == \result && y == y) && !~fp.eq~FLOAT(x, x)) && ~fp.eq~FLOAT(y, y)) && !~fp.eq~FLOAT(x, x)) [2021-10-29 05:29:03,301 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((0bv32 == \result && y == y) && !~fp.eq~FLOAT(x, x)) && ~fp.eq~FLOAT(y, y)) && !~fp.eq~FLOAT(x, x)) || (((((((x == x && !~fp.eq~FLOAT(y, y)) && y == y) && x == x) && ~fp.eq~FLOAT(x, x)) && 1bv32 == \result) && !(0bv32 == \result)) && x == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) [2021-10-29 05:29:03,302 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((0bv32 == \result && ~fp.eq~FLOAT(y, y)) && y == y) && y == \result) && !~fp.eq~FLOAT(x, x)) || (((((y == y && !~fp.eq~FLOAT(x, x)) && y == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && y == x) && !~fp.eq~FLOAT(x, x)) && ~fp.eq~FLOAT(\result, y))) || ((((((!~fp.eq~FLOAT(y, y) && ~fp.eq~FLOAT(x, x)) && y == y) && !~fp.eq~FLOAT(x, x)) && !~fp.eq~FLOAT(~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]), ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]))) && 1bv32 == \result) && ~fp.eq~FLOAT(\result, x)) [2021-10-29 05:29:03,302 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((0bv32 == \result && y == y) && !~fp.eq~FLOAT(x, x)) && ~fp.eq~FLOAT(y, y)) && y == x) && !~fp.eq~FLOAT(x, x)) || ((((~fp.eq~FLOAT(x, x) && y == y) && !~fp.eq~FLOAT(x, x)) && y == x) && 1bv32 == \result) [2021-10-29 05:29:03,302 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((~fp.eq~FLOAT(res, y) && y == y) && !~fp.eq~FLOAT(x, x)) && y == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && y == x) && !~fp.eq~FLOAT(x, x)) && 1bv32 == \result) && ~fp.eq~FLOAT(\result, y)) || (((((~fp.eq~FLOAT(y, y) && y == y) && y == res) && y == \result) && !~fp.eq~FLOAT(x, x)) && 1bv32 == \result)) || (((((((0bv32 == \result && !~fp.eq~FLOAT(y, y)) && ~fp.eq~FLOAT(x, x)) && y == y) && !~fp.eq~FLOAT(x, x)) && ~fp.eq~FLOAT(res, x)) && !~fp.eq~FLOAT(~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]), ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]))) && ~fp.eq~FLOAT(\result, x)) [2021-10-29 05:29:03,303 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((0bv32 == \result && ~fp.eq~FLOAT(x, x)) && y == y) && !~fp.eq~FLOAT(~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]), ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]))) && y == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && y == x) && 1bv32 == \result) || ((((((y == y && !~fp.eq~FLOAT(x, x)) && y == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && ~fp.eq~FLOAT(y, y)) && y == x) && !~fp.eq~FLOAT(x, x)) && !(0bv32 == \result)) [2021-10-29 05:29:03,303 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((aux-isnan_float(x) && !isnan_float(y)-aux && ~fp.eq~FLOAT(res, y)) && 0bv32 == \result) && y == y) && !~fp.eq~FLOAT(x, x)) && y == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && y == x) && !~fp.eq~FLOAT(x, x)) && ~fp.eq~FLOAT(\result, y)) || ((((((aux-isnan_float(x) && !isnan_float(y)-aux && 0bv32 == \result) && ~fp.eq~FLOAT(y, y)) && y == y) && y == res) && y == \result) && !~fp.eq~FLOAT(x, x)) [2021-10-29 05:29:03,304 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (!~fp.eq~FLOAT(x, x) && 1bv32 == \result) || (((((((0bv32 == \result && !~fp.eq~FLOAT(y, y)) && ~fp.eq~FLOAT(x, x)) && y == y) && !~fp.eq~FLOAT(x, x)) && ~fp.eq~FLOAT(res, x)) && !~fp.eq~FLOAT(~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]), ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]))) && ~fp.eq~FLOAT(\result, x)) [2021-10-29 05:29:03,304 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((!~fp.eq~FLOAT(y, y) && ~fp.eq~FLOAT(x, x)) && y == y) && !~fp.eq~FLOAT(x, x)) && ~fp.eq~FLOAT(res, x)) && !~fp.eq~FLOAT(~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]), ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]))) && 1bv32 == \result) && ~fp.eq~FLOAT(\result, x) [2021-10-29 05:29:03,334 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/witness.graphml [2021-10-29 05:29:03,334 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:29:03,336 INFO L168 Benchmark]: Toolchain (without parser) took 35361.68 ms. Allocated memory was 88.1 MB in the beginning and 125.8 MB in the end (delta: 37.7 MB). Free memory was 53.5 MB in the beginning and 99.6 MB in the end (delta: -46.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:29:03,336 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 88.1 MB. Free memory was 70.1 MB in the beginning and 70.0 MB in the end (delta: 75.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:29:03,337 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.66 ms. Allocated memory is still 88.1 MB. Free memory was 53.2 MB in the beginning and 72.4 MB in the end (delta: -19.2 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. [2021-10-29 05:29:03,337 INFO L168 Benchmark]: Boogie Procedure Inliner took 71.54 ms. Allocated memory is still 88.1 MB. Free memory was 72.4 MB in the beginning and 70.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:29:03,338 INFO L168 Benchmark]: Boogie Preprocessor took 37.41 ms. Allocated memory is still 88.1 MB. Free memory was 70.5 MB in the beginning and 68.7 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:29:03,338 INFO L168 Benchmark]: RCFGBuilder took 488.51 ms. Allocated memory is still 88.1 MB. Free memory was 68.7 MB in the beginning and 53.8 MB in the end (delta: 15.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-29 05:29:03,339 INFO L168 Benchmark]: TraceAbstraction took 34368.07 ms. Allocated memory was 88.1 MB in the beginning and 125.8 MB in the end (delta: 37.7 MB). Free memory was 53.3 MB in the beginning and 103.8 MB in the end (delta: -50.6 MB). Peak memory consumption was 61.9 MB. Max. memory is 16.1 GB. [2021-10-29 05:29:03,339 INFO L168 Benchmark]: Witness Printer took 95.85 ms. Allocated memory is still 125.8 MB. Free memory was 103.8 MB in the beginning and 99.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-29 05:29:03,341 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 88.1 MB. Free memory was 70.1 MB in the beginning and 70.0 MB in the end (delta: 75.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 293.66 ms. Allocated memory is still 88.1 MB. Free memory was 53.2 MB in the beginning and 72.4 MB in the end (delta: -19.2 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 71.54 ms. Allocated memory is still 88.1 MB. Free memory was 72.4 MB in the beginning and 70.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.41 ms. Allocated memory is still 88.1 MB. Free memory was 70.5 MB in the beginning and 68.7 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 488.51 ms. Allocated memory is still 88.1 MB. Free memory was 68.7 MB in the beginning and 53.8 MB in the end (delta: 15.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 34368.07 ms. Allocated memory was 88.1 MB in the beginning and 125.8 MB in the end (delta: 37.7 MB). Free memory was 53.3 MB in the beginning and 103.8 MB in the end (delta: -50.6 MB). Peak memory consumption was 61.9 MB. Max. memory is 16.1 GB. * Witness Printer took 95.85 ms. Allocated memory is still 125.8 MB. Free memory was 103.8 MB in the beginning and 99.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 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 - PositiveResult [Line: 76]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 82]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 47 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 34.2s, OverallIterations: 19, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 12.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 5.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1146 SDtfs, 2600 SDslu, 4552 SDs, 0 SdLazy, 2015 SolverSat, 263 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1045 GetRequests, 774 SyntacticMatches, 6 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 6.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=93occurred in iteration=7, InterpolantAutomatonStates: 211, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 19 MinimizatonAttempts, 578 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 14 PreInvPairs, 48 NumberOfFragments, 616 HoareAnnotationTreeSize, 14 FomulaSimplifications, 584044 FormulaSimplificationTreeSizeReduction, 0.7s HoareSimplificationTime, 14 FomulaSimplificationsInter, 78839 FormulaSimplificationTreeSizeReductionInter, 4.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 8.3s InterpolantComputationTime, 479 NumberOfCodeBlocks, 479 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 920 ConstructedInterpolants, 31 QuantifiedInterpolants, 3559 SizeOfPredicates, 145 NumberOfNonLiveVariables, 1646 ConjunctsInSsa, 188 ConjunctsInUnsatCore, 38 InterpolantComputations, 38 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 - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((((((0bv32 == \result && ~fp.eq~FLOAT(x, x)) && y == y) && !~fp.eq~FLOAT(~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]), ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]))) && y == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && y == x) && 1bv32 == \result) || ((((((y == y && !~fp.eq~FLOAT(x, x)) && y == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && ~fp.eq~FLOAT(y, y)) && y == x) && !~fp.eq~FLOAT(x, x)) && !(0bv32 == \result)) - InvariantResult [Line: 57]: Loop Invariant Derived loop invariant: ((((((((~fp.eq~FLOAT(res, y) && y == y) && !~fp.eq~FLOAT(x, x)) && y == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && y == x) && !~fp.eq~FLOAT(x, x)) && 1bv32 == \result) && ~fp.eq~FLOAT(\result, y)) || (((((~fp.eq~FLOAT(y, y) && y == y) && y == res) && y == \result) && !~fp.eq~FLOAT(x, x)) && 1bv32 == \result)) || (((((((0bv32 == \result && !~fp.eq~FLOAT(y, y)) && ~fp.eq~FLOAT(x, x)) && y == y) && !~fp.eq~FLOAT(x, x)) && ~fp.eq~FLOAT(res, x)) && !~fp.eq~FLOAT(~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]), ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]))) && ~fp.eq~FLOAT(\result, x)) - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: (((((0bv32 == \result && ~fp.eq~FLOAT(y, y)) && y == y) && y == \result) && !~fp.eq~FLOAT(x, x)) || (((((y == y && !~fp.eq~FLOAT(x, x)) && y == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && y == x) && !~fp.eq~FLOAT(x, x)) && ~fp.eq~FLOAT(\result, y))) || ((((((!~fp.eq~FLOAT(y, y) && ~fp.eq~FLOAT(x, x)) && y == y) && !~fp.eq~FLOAT(x, x)) && !~fp.eq~FLOAT(~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]), ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]))) && 1bv32 == \result) && ~fp.eq~FLOAT(\result, x)) - InvariantResult [Line: 59]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 57]: Loop Invariant Derived loop invariant: (((aux-!isnan_float(x) && isnan_float(y)-aux && ((!~fp.eq~FLOAT(y, y) && 1bv32 == \result) || (0bv32 == \result && ~fp.eq~FLOAT(y, y)))) && !aux-(isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y))-aux) && !aux-isnan_float(x) && !isnan_float(y)-aux) && ~fp.eq~FLOAT(x, x) - InvariantResult [Line: 57]: Loop Invariant Derived loop invariant: ((((!~fp.eq~FLOAT(y, y) && !aux-(isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y))-aux) && !aux-isnan_float(x) && !isnan_float(y)-aux) && !~fp.eq~FLOAT(x, x)) && 1bv32 == \result) || (((0bv32 == \result && !aux-(isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y))-aux) && !aux-isnan_float(x) && !isnan_float(y)-aux) && ~fp.eq~FLOAT(x, x)) - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((((0bv32 == \result && y == y) && !~fp.eq~FLOAT(x, x)) && ~fp.eq~FLOAT(y, y)) && !~fp.eq~FLOAT(x, x)) || (((((((x == x && !~fp.eq~FLOAT(y, y)) && y == y) && x == x) && ~fp.eq~FLOAT(x, x)) && 1bv32 == \result) && !(0bv32 == \result)) && x == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: (((((x == x && !~fp.eq~FLOAT(y, y)) && y == y) && x == x) && ~fp.eq~FLOAT(x, x)) && 1bv32 == \result) || ((((0bv32 == \result && y == y) && !~fp.eq~FLOAT(x, x)) && ~fp.eq~FLOAT(y, y)) && !~fp.eq~FLOAT(x, x)) - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: (((((0bv32 == \result && y == y) && !~fp.eq~FLOAT(x, x)) && ~fp.eq~FLOAT(y, y)) && y == x) && !~fp.eq~FLOAT(x, x)) || ((((~fp.eq~FLOAT(x, x) && y == y) && !~fp.eq~FLOAT(x, x)) && y == x) && 1bv32 == \result) - InvariantResult [Line: 57]: Loop Invariant Derived loop invariant: ((((((((aux-isnan_float(x) && !isnan_float(y)-aux && ~fp.eq~FLOAT(res, y)) && 0bv32 == \result) && y == y) && !~fp.eq~FLOAT(x, x)) && y == ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0])) && y == x) && !~fp.eq~FLOAT(x, x)) && ~fp.eq~FLOAT(\result, y)) || ((((((aux-isnan_float(x) && !isnan_float(y)-aux && 0bv32 == \result) && ~fp.eq~FLOAT(y, y)) && y == y) && y == res) && y == \result) && !~fp.eq~FLOAT(x, x)) - InvariantResult [Line: 57]: Loop Invariant Derived loop invariant: (!~fp.eq~FLOAT(x, x) && 1bv32 == \result) || (((((((0bv32 == \result && !~fp.eq~FLOAT(y, y)) && ~fp.eq~FLOAT(x, x)) && y == y) && !~fp.eq~FLOAT(x, x)) && ~fp.eq~FLOAT(res, x)) && !~fp.eq~FLOAT(~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]), ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]))) && ~fp.eq~FLOAT(\result, x)) - InvariantResult [Line: 57]: Loop Invariant Derived loop invariant: (aux-isnan_float(x) && !isnan_float(y)-aux && ((!~fp.eq~FLOAT(y, y) && 1bv32 == \result) || (0bv32 == \result && ~fp.eq~FLOAT(y, y)))) && !~fp.eq~FLOAT(x, x) - InvariantResult [Line: 57]: Loop Invariant Derived loop invariant: (0bv32 == \result && ~fp.eq~FLOAT(x, x)) || (!~fp.eq~FLOAT(x, x) && 1bv32 == \result) - InvariantResult [Line: 57]: Loop Invariant Derived loop invariant: ((((((!~fp.eq~FLOAT(y, y) && ~fp.eq~FLOAT(x, x)) && y == y) && !~fp.eq~FLOAT(x, x)) && ~fp.eq~FLOAT(res, x)) && !~fp.eq~FLOAT(~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]), ~fp~LONGDOUBLE(w[31:31], w[30:23], w[22:0]))) && 1bv32 == \result) && ~fp.eq~FLOAT(\result, x) RESULT: Ultimate proved your program to be correct! [2021-10-29 05:29:03,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b572255f-578e-4805-89b8-a4e64b782395/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...