./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw --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 6764d5c0204d5929259e99bbe2407d8f2018e402cda704b63da836202ebf4e68 .......................................................................................................................................................................................................................................................................................................... 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_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw --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 6764d5c0204d5929259e99bbe2407d8f2018e402cda704b63da836202ebf4e68 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-20 05:27:42,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-20 05:27:42,527 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-20 05:27:42,564 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-20 05:27:42,565 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-20 05:27:42,566 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-20 05:27:42,568 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-20 05:27:42,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-20 05:27:42,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-20 05:27:42,574 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-20 05:27:42,575 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-20 05:27:42,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-20 05:27:42,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-20 05:27:42,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-20 05:27:42,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-20 05:27:42,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-20 05:27:42,583 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-20 05:27:42,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-20 05:27:42,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-20 05:27:42,590 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-20 05:27:42,594 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-20 05:27:42,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-20 05:27:42,600 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-20 05:27:42,601 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-20 05:27:42,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-20 05:27:42,614 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-20 05:27:42,614 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-20 05:27:42,615 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-20 05:27:42,617 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-20 05:27:42,618 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-20 05:27:42,620 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-20 05:27:42,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-20 05:27:42,623 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-20 05:27:42,624 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-20 05:27:42,626 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-20 05:27:42,626 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-20 05:27:42,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-20 05:27:42,627 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-20 05:27:42,627 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-20 05:27:42,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-20 05:27:42,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-20 05:27:42,630 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-20 05:27:42,674 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-20 05:27:42,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-20 05:27:42,683 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-20 05:27:42,683 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-20 05:27:42,683 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-20 05:27:42,683 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-20 05:27:42,684 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-20 05:27:42,684 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-20 05:27:42,684 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-20 05:27:42,684 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-20 05:27:42,684 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-20 05:27:42,684 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-20 05:27:42,685 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-20 05:27:42,685 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-20 05:27:42,685 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-20 05:27:42,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-20 05:27:42,686 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-20 05:27:42,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-20 05:27:42,686 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-20 05:27:42,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-20 05:27:42,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-20 05:27:42,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-20 05:27:42,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-20 05:27:42,687 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-20 05:27:42,688 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-20 05:27:42,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-20 05:27:42,688 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-20 05:27:42,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-20 05:27:42,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-20 05:27:42,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-20 05:27:42,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:27:42,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-20 05:27:42,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-20 05:27:42,689 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-20 05:27:42,689 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-20 05:27:42,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-20 05:27:42,690 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-20 05:27:42,690 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-20 05:27:42,690 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-20 05:27:42,690 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_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6764d5c0204d5929259e99bbe2407d8f2018e402cda704b63da836202ebf4e68 [2021-10-20 05:27:42,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-20 05:27:42,983 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-20 05:27:42,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-20 05:27:42,987 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-20 05:27:42,988 INFO L275 PluginConnector]: CDTParser initialized [2021-10-20 05:27:42,989 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2021-10-20 05:27:43,057 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/data/c8f1dc52c/357357e976e945939014c13a2196e2d3/FLAG59efefd4d [2021-10-20 05:27:43,612 INFO L306 CDTParser]: Found 1 translation units. [2021-10-20 05:27:43,613 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2021-10-20 05:27:43,619 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/data/c8f1dc52c/357357e976e945939014c13a2196e2d3/FLAG59efefd4d [2021-10-20 05:27:44,010 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/data/c8f1dc52c/357357e976e945939014c13a2196e2d3 [2021-10-20 05:27:44,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-20 05:27:44,021 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-20 05:27:44,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-20 05:27:44,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-20 05:27:44,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-20 05:27:44,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:27:44" (1/1) ... [2021-10-20 05:27:44,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c28f5f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:44, skipping insertion in model container [2021-10-20 05:27:44,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:27:44" (1/1) ... [2021-10-20 05:27:44,039 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-20 05:27:44,059 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 05:27:44,265 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_a06a91f8-b0c6-4792-bd45-0968e7ea145f/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c[1657,1670] [2021-10-20 05:27:44,277 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:27:44,289 INFO L203 MainTranslator]: Completed pre-run [2021-10-20 05:27:44,328 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_a06a91f8-b0c6-4792-bd45-0968e7ea145f/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c[1657,1670] [2021-10-20 05:27:44,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:27:44,347 INFO L208 MainTranslator]: Completed translation [2021-10-20 05:27:44,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:44 WrapperNode [2021-10-20 05:27:44,348 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-20 05:27:44,350 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-20 05:27:44,350 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-20 05:27:44,350 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-20 05:27:44,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:44" (1/1) ... [2021-10-20 05:27:44,374 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:44" (1/1) ... [2021-10-20 05:27:44,409 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-20 05:27:44,410 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-20 05:27:44,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-20 05:27:44,410 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-20 05:27:44,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:44" (1/1) ... [2021-10-20 05:27:44,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:44" (1/1) ... [2021-10-20 05:27:44,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:44" (1/1) ... [2021-10-20 05:27:44,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:44" (1/1) ... [2021-10-20 05:27:44,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:44" (1/1) ... [2021-10-20 05:27:44,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:44" (1/1) ... [2021-10-20 05:27:44,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:44" (1/1) ... [2021-10-20 05:27:44,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-20 05:27:44,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-20 05:27:44,468 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-20 05:27:44,468 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-20 05:27:44,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:44" (1/1) ... [2021-10-20 05:27:44,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:27:44,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 05:27:44,504 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-20 05:27:44,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-20 05:27:44,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-20 05:27:44,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-20 05:27:44,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-10-20 05:27:44,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-20 05:27:44,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-20 05:27:44,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-20 05:27:44,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-20 05:27:45,207 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-20 05:27:45,214 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-20 05:27:45,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:27:45 BoogieIcfgContainer [2021-10-20 05:27:45,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-20 05:27:45,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-20 05:27:45,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-20 05:27:45,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-20 05:27:45,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 05:27:44" (1/3) ... [2021-10-20 05:27:45,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14c33b07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:27:45, skipping insertion in model container [2021-10-20 05:27:45,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:44" (2/3) ... [2021-10-20 05:27:45,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14c33b07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:27:45, skipping insertion in model container [2021-10-20 05:27:45,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:27:45" (3/3) ... [2021-10-20 05:27:45,230 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2021-10-20 05:27:45,238 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-20 05:27:45,238 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-20 05:27:45,303 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-20 05:27:45,314 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 [2021-10-20 05:27:45,314 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-20 05:27:45,330 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:27:45,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-20 05:27:45,350 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:27:45,350 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:27:45,351 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:27:45,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:27:45,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1375961059, now seen corresponding path program 1 times [2021-10-20 05:27:45,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:27:45,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656395704] [2021-10-20 05:27:45,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:27:45,368 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:27:45,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:27:45,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:27:45,531 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:27:45,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656395704] [2021-10-20 05:27:45,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656395704] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:27:45,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:27:45,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 05:27:45,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953325617] [2021-10-20 05:27:45,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-20 05:27:45,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:27:45,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-20 05:27:45,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-20 05:27:45,558 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:27:45,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:27:45,576 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2021-10-20 05:27:45,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-20 05:27:45,578 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 [2021-10-20 05:27:45,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:27:45,586 INFO L225 Difference]: With dead ends: 35 [2021-10-20 05:27:45,586 INFO L226 Difference]: Without dead ends: 16 [2021-10-20 05:27:45,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-20 05:27:45,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-20 05:27:45,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-20 05:27:45,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:27:45,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-10-20 05:27:45,617 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 8 [2021-10-20 05:27:45,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:27:45,617 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-10-20 05:27:45,618 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) [2021-10-20 05:27:45,618 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-10-20 05:27:45,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-20 05:27:45,618 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:27:45,619 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:27:45,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-20 05:27:45,619 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:27:45,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:27:45,620 INFO L82 PathProgramCache]: Analyzing trace with hash 2106007434, now seen corresponding path program 1 times [2021-10-20 05:27:45,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:27:45,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772556901] [2021-10-20 05:27:45,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:27:45,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:27:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-20 05:27:45,678 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-20 05:27:45,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-20 05:27:45,732 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-20 05:27:45,732 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-20 05:27:45,734 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:27:45,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-20 05:27:45,742 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-20 05:27:45,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 05:27:45 BoogieIcfgContainer [2021-10-20 05:27:45,764 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-20 05:27:45,765 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-20 05:27:45,765 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-20 05:27:45,765 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-20 05:27:45,766 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:27:45" (3/4) ... [2021-10-20 05:27:45,769 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-20 05:27:45,769 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-20 05:27:45,771 INFO L168 Benchmark]: Toolchain (without parser) took 1749.29 ms. Allocated memory was 83.9 MB in the beginning and 104.9 MB in the end (delta: 21.0 MB). Free memory was 49.4 MB in the beginning and 74.2 MB in the end (delta: -24.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:27:45,771 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 83.9 MB. Free memory was 54.0 MB in the beginning and 53.9 MB in the end (delta: 26.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:27:45,772 INFO L168 Benchmark]: CACSL2BoogieTranslator took 324.19 ms. Allocated memory was 83.9 MB in the beginning and 104.9 MB in the end (delta: 21.0 MB). Free memory was 49.1 MB in the beginning and 80.9 MB in the end (delta: -31.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-20 05:27:45,773 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.43 ms. Allocated memory is still 104.9 MB. Free memory was 80.4 MB in the beginning and 79.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:27:45,773 INFO L168 Benchmark]: Boogie Preprocessor took 56.46 ms. Allocated memory is still 104.9 MB. Free memory was 79.0 MB in the beginning and 77.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 05:27:45,774 INFO L168 Benchmark]: RCFGBuilder took 749.94 ms. Allocated memory is still 104.9 MB. Free memory was 77.3 MB in the beginning and 54.3 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-20 05:27:45,775 INFO L168 Benchmark]: TraceAbstraction took 545.68 ms. Allocated memory is still 104.9 MB. Free memory was 53.8 MB in the beginning and 74.7 MB in the end (delta: -20.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:27:45,775 INFO L168 Benchmark]: Witness Printer took 4.05 ms. Allocated memory is still 104.9 MB. Free memory was 74.7 MB in the beginning and 74.2 MB in the end (delta: 578.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:27:45,779 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 83.9 MB. Free memory was 54.0 MB in the beginning and 53.9 MB in the end (delta: 26.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 324.19 ms. Allocated memory was 83.9 MB in the beginning and 104.9 MB in the end (delta: 21.0 MB). Free memory was 49.1 MB in the beginning and 80.9 MB in the end (delta: -31.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 59.43 ms. Allocated memory is still 104.9 MB. Free memory was 80.4 MB in the beginning and 79.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 56.46 ms. Allocated memory is still 104.9 MB. Free memory was 79.0 MB in the beginning and 77.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 749.94 ms. Allocated memory is still 104.9 MB. Free memory was 77.3 MB in the beginning and 54.3 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 545.68 ms. Allocated memory is still 104.9 MB. Free memory was 53.8 MB in the beginning and 74.7 MB in the end (delta: -20.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 4.05 ms. Allocated memory is still 104.9 MB. Free memory was 74.7 MB in the beginning and 74.2 MB in the end (delta: 578.4 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, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 72]: 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 71, overapproximation of someUnaryFLOAToperation at line 66. Possible FailurePath: [L66] float x = -0.0f; [L67] float y = 0.0f; [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L25-L26] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L28-L29] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L31] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L34] return 0; [L38] COND TRUE __fpclassify_float(x) == 0 [L39] return y; [L68] float res = fmin_float(x, y); [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L71] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L72] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 439.3ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 24.4ms, AutomataDifference: 48.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 19 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 15.0ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 8.1ms SsaConstructionTime, 64.9ms SatisfiabilityAnalysisTime, 60.3ms 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 [2021-10-20 05:27:45,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/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-e943c26 [2021-10-20 05:27:48,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-20 05:27:48,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-20 05:27:48,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-20 05:27:48,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-20 05:27:48,355 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-20 05:27:48,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-20 05:27:48,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-20 05:27:48,362 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-20 05:27:48,363 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-20 05:27:48,364 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-20 05:27:48,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-20 05:27:48,366 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-20 05:27:48,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-20 05:27:48,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-20 05:27:48,371 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-20 05:27:48,372 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-20 05:27:48,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-20 05:27:48,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-20 05:27:48,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-20 05:27:48,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-20 05:27:48,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-20 05:27:48,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-20 05:27:48,386 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-20 05:27:48,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-20 05:27:48,390 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-20 05:27:48,391 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-20 05:27:48,392 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-20 05:27:48,393 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-20 05:27:48,394 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-20 05:27:48,394 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-20 05:27:48,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-20 05:27:48,397 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-20 05:27:48,398 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-20 05:27:48,399 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-20 05:27:48,400 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-20 05:27:48,401 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-20 05:27:48,401 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-20 05:27:48,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-20 05:27:48,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-20 05:27:48,404 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-20 05:27:48,405 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-20 05:27:48,429 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-20 05:27:48,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-20 05:27:48,430 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-20 05:27:48,431 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-20 05:27:48,431 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-20 05:27:48,431 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-20 05:27:48,432 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-20 05:27:48,432 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-20 05:27:48,432 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-20 05:27:48,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-20 05:27:48,434 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-20 05:27:48,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-20 05:27:48,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-20 05:27:48,434 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-20 05:27:48,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-20 05:27:48,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-20 05:27:48,435 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-20 05:27:48,436 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-20 05:27:48,436 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-20 05:27:48,436 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-20 05:27:48,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-20 05:27:48,437 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-20 05:27:48,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-20 05:27:48,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-20 05:27:48,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-20 05:27:48,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-20 05:27:48,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:27:48,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-20 05:27:48,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-20 05:27:48,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-20 05:27:48,440 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-20 05:27:48,440 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-20 05:27:48,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-20 05:27:48,440 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-20 05:27:48,441 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-20 05:27:48,441 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_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6764d5c0204d5929259e99bbe2407d8f2018e402cda704b63da836202ebf4e68 [2021-10-20 05:27:48,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-20 05:27:48,856 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-20 05:27:48,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-20 05:27:48,860 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-20 05:27:48,860 INFO L275 PluginConnector]: CDTParser initialized [2021-10-20 05:27:48,861 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2021-10-20 05:27:48,931 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/data/2d8f5aa91/2551ba97b23e4a308c744df4aa0a40be/FLAG2938f823f [2021-10-20 05:27:49,420 INFO L306 CDTParser]: Found 1 translation units. [2021-10-20 05:27:49,422 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2021-10-20 05:27:49,430 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/data/2d8f5aa91/2551ba97b23e4a308c744df4aa0a40be/FLAG2938f823f [2021-10-20 05:27:49,777 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/data/2d8f5aa91/2551ba97b23e4a308c744df4aa0a40be [2021-10-20 05:27:49,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-20 05:27:49,783 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-20 05:27:49,787 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-20 05:27:49,787 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-20 05:27:49,791 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-20 05:27:49,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:27:49" (1/1) ... [2021-10-20 05:27:49,793 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@695c945a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:49, skipping insertion in model container [2021-10-20 05:27:49,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:27:49" (1/1) ... [2021-10-20 05:27:49,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-20 05:27:49,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 05:27:50,057 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_a06a91f8-b0c6-4792-bd45-0968e7ea145f/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c[1657,1670] [2021-10-20 05:27:50,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:27:50,080 INFO L203 MainTranslator]: Completed pre-run [2021-10-20 05:27:50,127 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_a06a91f8-b0c6-4792-bd45-0968e7ea145f/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c[1657,1670] [2021-10-20 05:27:50,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:27:50,161 INFO L208 MainTranslator]: Completed translation [2021-10-20 05:27:50,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:50 WrapperNode [2021-10-20 05:27:50,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-20 05:27:50,163 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-20 05:27:50,163 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-20 05:27:50,163 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-20 05:27:50,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:50" (1/1) ... [2021-10-20 05:27:50,210 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:50" (1/1) ... [2021-10-20 05:27:50,238 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-20 05:27:50,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-20 05:27:50,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-20 05:27:50,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-20 05:27:50,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:50" (1/1) ... [2021-10-20 05:27:50,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:50" (1/1) ... [2021-10-20 05:27:50,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:50" (1/1) ... [2021-10-20 05:27:50,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:50" (1/1) ... [2021-10-20 05:27:50,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:50" (1/1) ... [2021-10-20 05:27:50,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:50" (1/1) ... [2021-10-20 05:27:50,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:50" (1/1) ... [2021-10-20 05:27:50,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-20 05:27:50,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-20 05:27:50,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-20 05:27:50,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-20 05:27:50,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:50" (1/1) ... [2021-10-20 05:27:50,279 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:27:50,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 05:27:50,304 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-20 05:27:50,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-20 05:27:50,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-20 05:27:50,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-20 05:27:50,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-20 05:27:50,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-20 05:27:50,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-20 05:27:50,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2021-10-20 05:27:50,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-20 05:27:50,661 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-20 05:27:50,662 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-20 05:27:50,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:27:50 BoogieIcfgContainer [2021-10-20 05:27:50,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-20 05:27:50,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-20 05:27:50,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-20 05:27:50,668 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-20 05:27:50,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 05:27:49" (1/3) ... [2021-10-20 05:27:50,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405fbf7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:27:50, skipping insertion in model container [2021-10-20 05:27:50,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:27:50" (2/3) ... [2021-10-20 05:27:50,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405fbf7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:27:50, skipping insertion in model container [2021-10-20 05:27:50,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:27:50" (3/3) ... [2021-10-20 05:27:50,671 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2021-10-20 05:27:50,677 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-20 05:27:50,677 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-20 05:27:50,738 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-20 05:27:50,754 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 [2021-10-20 05:27:50,754 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-20 05:27:50,783 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:27:50,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-20 05:27:50,789 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:27:50,790 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:27:50,791 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:27:50,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:27:50,796 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2021-10-20 05:27:50,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 05:27:50,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079532866] [2021-10-20 05:27:50,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:27:50,810 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 05:27:50,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 05:27:50,813 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 05:27:50,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-20 05:27:50,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:27:50,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-20 05:27:50,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 05:27:51,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:27:51,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 05:27:51,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:27:51,093 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 05:27:51,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079532866] [2021-10-20 05:27:51,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079532866] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 05:27:51,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:27:51,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-20 05:27:51,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330553961] [2021-10-20 05:27:51,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-20 05:27:51,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 05:27:51,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-20 05:27:51,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-20 05:27:51,129 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:27:51,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:27:51,148 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2021-10-20 05:27:51,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-20 05:27:51,172 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-20 05:27:51,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:27:51,182 INFO L225 Difference]: With dead ends: 62 [2021-10-20 05:27:51,182 INFO L226 Difference]: Without dead ends: 29 [2021-10-20 05:27:51,185 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-20 05:27:51,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-20 05:27:51,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-20 05:27:51,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:27:51,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-10-20 05:27:51,240 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2021-10-20 05:27:51,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:27:51,241 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-10-20 05:27:51,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:27:51,241 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-10-20 05:27:51,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-20 05:27:51,241 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:27:51,242 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:27:51,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-20 05:27:51,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 05:27:51,443 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:27:51,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:27:51,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2021-10-20 05:27:51,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 05:27:51,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757991409] [2021-10-20 05:27:51,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:27:51,445 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 05:27:51,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 05:27:51,447 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 05:27:51,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-20 05:27:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:27:51,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-20 05:27:51,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 05:27:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:27:51,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 05:27:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:27:51,687 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 05:27:51,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757991409] [2021-10-20 05:27:51,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757991409] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 05:27:51,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:27:51,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-20 05:27:51,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639365411] [2021-10-20 05:27:51,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-20 05:27:51,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 05:27:51,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-20 05:27:51,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-20 05:27:51,695 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:27:51,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:27:51,801 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2021-10-20 05:27:51,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-20 05:27:51,802 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-20 05:27:51,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:27:51,805 INFO L225 Difference]: With dead ends: 68 [2021-10-20 05:27:51,805 INFO L226 Difference]: Without dead ends: 59 [2021-10-20 05:27:51,808 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-20 05:27:51,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-20 05:27:51,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2021-10-20 05:27:51,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:27:51,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-20 05:27:51,827 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2021-10-20 05:27:51,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:27:51,827 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-20 05:27:51,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:27:51,828 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-20 05:27:51,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-20 05:27:51,830 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:27:51,831 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:27:51,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-20 05:27:52,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 05:27:52,048 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:27:52,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:27:52,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2021-10-20 05:27:52,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 05:27:52,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450977840] [2021-10-20 05:27:52,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:27:52,051 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 05:27:52,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 05:27:52,052 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 05:27:52,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-20 05:27:52,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:27:52,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-20 05:27:52,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 05:27:52,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:27:52,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 05:27:52,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:27:52,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 05:27:52,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450977840] [2021-10-20 05:27:52,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450977840] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 05:27:52,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:27:52,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-20 05:27:52,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017246824] [2021-10-20 05:27:52,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:27:52,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 05:27:52,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:27:52,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:27:52,266 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:27:52,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:27:52,310 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-10-20 05:27:52,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:27:52,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-20 05:27:52,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:27:52,312 INFO L225 Difference]: With dead ends: 52 [2021-10-20 05:27:52,312 INFO L226 Difference]: Without dead ends: 26 [2021-10-20 05:27:52,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 05:27:52,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-20 05:27:52,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-20 05:27:52,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:27:52,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-10-20 05:27:52,317 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2021-10-20 05:27:52,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:27:52,317 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-10-20 05:27:52,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:27:52,317 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-10-20 05:27:52,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-20 05:27:52,318 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:27:52,318 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:27:52,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-20 05:27:52,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 05:27:52,531 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:27:52,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:27:52,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2021-10-20 05:27:52,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 05:27:52,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546743839] [2021-10-20 05:27:52,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:27:52,533 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 05:27:52,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 05:27:52,535 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 05:27:52,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-20 05:27:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:27:52,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-20 05:27:52,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 05:27:52,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:27:52,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 05:27:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:27:52,741 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 05:27:52,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546743839] [2021-10-20 05:27:52,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [546743839] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 05:27:52,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:27:52,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-20 05:27:52,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044151860] [2021-10-20 05:27:52,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-20 05:27:52,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 05:27:52,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-20 05:27:52,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-20 05:27:52,744 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:27:52,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:27:52,799 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-10-20 05:27:52,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-20 05:27:52,800 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-20 05:27:52,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:27:52,801 INFO L225 Difference]: With dead ends: 61 [2021-10-20 05:27:52,801 INFO L226 Difference]: Without dead ends: 52 [2021-10-20 05:27:52,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-20 05:27:52,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-20 05:27:52,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2021-10-20 05:27:52,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 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) [2021-10-20 05:27:52,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-10-20 05:27:52,807 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2021-10-20 05:27:52,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:27:52,807 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-10-20 05:27:52,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:27:52,808 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-10-20 05:27:52,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-20 05:27:52,809 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:27:52,809 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:27:52,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-20 05:27:53,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 05:27:53,015 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:27:53,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:27:53,017 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2021-10-20 05:27:53,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 05:27:53,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963389753] [2021-10-20 05:27:53,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:27:53,018 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 05:27:53,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 05:27:53,019 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 05:27:53,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-20 05:27:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:27:53,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-20 05:27:53,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 05:27:53,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:27:53,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 05:27:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:27:53,369 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 05:27:53,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963389753] [2021-10-20 05:27:53,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963389753] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 05:27:53,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:27:53,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-20 05:27:53,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545662284] [2021-10-20 05:27:53,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:27:53,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 05:27:53,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:27:53,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:27:53,372 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:27:53,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:27:53,382 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2021-10-20 05:27:53,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:27:53,383 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-20 05:27:53,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:27:53,384 INFO L225 Difference]: With dead ends: 38 [2021-10-20 05:27:53,384 INFO L226 Difference]: Without dead ends: 28 [2021-10-20 05:27:53,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:27:53,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-20 05:27:53,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-20 05:27:53,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 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) [2021-10-20 05:27:53,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-10-20 05:27:53,389 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2021-10-20 05:27:53,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:27:53,390 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-10-20 05:27:53,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:27:53,390 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-10-20 05:27:53,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-20 05:27:53,391 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:27:53,391 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:27:53,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-20 05:27:53,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 05:27:53,604 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:27:53,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:27:53,604 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2021-10-20 05:27:53,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 05:27:53,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342523090] [2021-10-20 05:27:53,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:27:53,605 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 05:27:53,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 05:27:53,606 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 05:27:53,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-20 05:27:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:27:53,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-20 05:27:53,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 05:27:53,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:27:53,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 05:27:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:27:53,947 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 05:27:53,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342523090] [2021-10-20 05:27:53,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342523090] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 05:27:53,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:27:53,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-10-20 05:27:53,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038151161] [2021-10-20 05:27:53,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-20 05:27:53,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 05:27:53,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-20 05:27:53,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-20 05:27:53,953 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:27:54,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:27:54,046 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-10-20 05:27:54,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-20 05:27:54,046 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-20 05:27:54,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:27:54,047 INFO L225 Difference]: With dead ends: 40 [2021-10-20 05:27:54,047 INFO L226 Difference]: Without dead ends: 37 [2021-10-20 05:27:54,047 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-20 05:27:54,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-20 05:27:54,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-10-20 05:27:54,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 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) [2021-10-20 05:27:54,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-10-20 05:27:54,052 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2021-10-20 05:27:54,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:27:54,052 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-10-20 05:27:54,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:27:54,053 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-10-20 05:27:54,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-20 05:27:54,054 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:27:54,054 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:27:54,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-20 05:27:54,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 05:27:54,263 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:27:54,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:27:54,264 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2021-10-20 05:27:54,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 05:27:54,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858342665] [2021-10-20 05:27:54,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:27:54,265 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 05:27:54,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 05:27:54,266 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 05:27:54,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-20 05:27:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:27:54,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-20 05:27:54,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 05:27:54,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:27:54,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 05:27:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:27:54,555 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 05:27:54,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858342665] [2021-10-20 05:27:54,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858342665] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 05:27:54,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:27:54,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-20 05:27:54,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573159025] [2021-10-20 05:27:54,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-20 05:27:54,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 05:27:54,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-20 05:27:54,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-20 05:27:54,557 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:27:54,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:27:54,595 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-10-20 05:27:54,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-20 05:27:54,598 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-20 05:27:54,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:27:54,599 INFO L225 Difference]: With dead ends: 43 [2021-10-20 05:27:54,599 INFO L226 Difference]: Without dead ends: 23 [2021-10-20 05:27:54,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-20 05:27:54,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-20 05:27:54,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-20 05:27:54,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0) internal successors, (22), 22 states have internal predecessors, (22), 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) [2021-10-20 05:27:54,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2021-10-20 05:27:54,603 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 19 [2021-10-20 05:27:54,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:27:54,603 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2021-10-20 05:27:54,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:27:54,603 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2021-10-20 05:27:54,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-20 05:27:54,604 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:27:54,605 INFO L512 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] [2021-10-20 05:27:54,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-20 05:27:54,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 05:27:54,817 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:27:54,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:27:54,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2021-10-20 05:27:54,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 05:27:54,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575036251] [2021-10-20 05:27:54,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:27:54,818 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 05:27:54,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 05:27:54,819 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 05:27:54,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-20 05:27:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-20 05:27:54,985 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-20 05:27:55,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-20 05:27:55,101 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-20 05:27:55,102 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-20 05:27:55,103 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:27:55,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-20 05:27:55,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 05:27:55,319 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-20 05:27:55,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 05:27:55 BoogieIcfgContainer [2021-10-20 05:27:55,370 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-20 05:27:55,370 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-20 05:27:55,371 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-20 05:27:55,371 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-20 05:27:55,371 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:27:50" (3/4) ... [2021-10-20 05:27:55,373 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-20 05:27:55,448 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/witness.graphml [2021-10-20 05:27:55,449 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-20 05:27:55,450 INFO L168 Benchmark]: Toolchain (without parser) took 5666.50 ms. Allocated memory was 81.8 MB in the beginning and 117.4 MB in the end (delta: 35.7 MB). Free memory was 47.2 MB in the beginning and 61.8 MB in the end (delta: -14.6 MB). Peak memory consumption was 22.0 MB. Max. memory is 16.1 GB. [2021-10-20 05:27:55,451 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 81.8 MB. Free memory was 63.5 MB in the beginning and 63.5 MB in the end (delta: 69.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:27:55,451 INFO L168 Benchmark]: CACSL2BoogieTranslator took 375.29 ms. Allocated memory is still 81.8 MB. Free memory was 47.0 MB in the beginning and 66.0 MB in the end (delta: -19.0 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. [2021-10-20 05:27:55,452 INFO L168 Benchmark]: Boogie Procedure Inliner took 75.34 ms. Allocated memory is still 81.8 MB. Free memory was 66.0 MB in the beginning and 64.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 05:27:55,452 INFO L168 Benchmark]: Boogie Preprocessor took 32.23 ms. Allocated memory is still 81.8 MB. Free memory was 64.0 MB in the beginning and 62.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:27:55,453 INFO L168 Benchmark]: RCFGBuilder took 392.27 ms. Allocated memory is still 81.8 MB. Free memory was 62.4 MB in the beginning and 49.0 MB in the end (delta: 13.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-20 05:27:55,454 INFO L168 Benchmark]: TraceAbstraction took 4704.49 ms. Allocated memory was 81.8 MB in the beginning and 117.4 MB in the end (delta: 35.7 MB). Free memory was 48.5 MB in the beginning and 64.4 MB in the end (delta: -15.9 MB). Peak memory consumption was 21.5 MB. Max. memory is 16.1 GB. [2021-10-20 05:27:55,454 INFO L168 Benchmark]: Witness Printer took 78.38 ms. Allocated memory is still 117.4 MB. Free memory was 64.4 MB in the beginning and 61.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 05:27:55,457 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 81.8 MB. Free memory was 63.5 MB in the beginning and 63.5 MB in the end (delta: 69.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 375.29 ms. Allocated memory is still 81.8 MB. Free memory was 47.0 MB in the beginning and 66.0 MB in the end (delta: -19.0 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 75.34 ms. Allocated memory is still 81.8 MB. Free memory was 66.0 MB in the beginning and 64.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.23 ms. Allocated memory is still 81.8 MB. Free memory was 64.0 MB in the beginning and 62.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 392.27 ms. Allocated memory is still 81.8 MB. Free memory was 62.4 MB in the beginning and 49.0 MB in the end (delta: 13.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4704.49 ms. Allocated memory was 81.8 MB in the beginning and 117.4 MB in the end (delta: 35.7 MB). Free memory was 48.5 MB in the beginning and 64.4 MB in the end (delta: -15.9 MB). Peak memory consumption was 21.5 MB. Max. memory is 16.1 GB. * Witness Printer took 78.38 ms. Allocated memory is still 117.4 MB. Free memory was 64.4 MB in the beginning and 61.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 72]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L66] float x = -0.0f; [L67] float y = 0.0f; [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND TRUE w == 0x00000000 || w == 0x80000000 [L24] return 2; [L38] COND FALSE !(__fpclassify_float(x) == 0) [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND TRUE w == 0x00000000 || w == 0x80000000 [L24] return 2; [L40] COND FALSE !(__fpclassify_float(y) == 0) [L43] EXPR x < y ? x : y [L43] return x < y ? x : y; [L68] float res = fmin_float(x, y); [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L47] __uint32_t w; [L50] ieee_float_shape_type gf_u; [L51] gf_u.value = (x) [L52] EXPR gf_u.word [L52] (w) = gf_u.word [L55] return (w & 0x80000000) != 0; [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L71] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L72] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4581.1ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 18.8ms, AutomataDifference: 455.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 23.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 222 SDtfs, 167 SDslu, 326 SDs, 0 SdLazy, 105 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 145.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 172 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 257.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 79.2ms AutomataMinimizationTime, 7 MinimizatonAttempts, 59 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 108.6ms SsaConstructionTime, 328.2ms SatisfiabilityAnalysisTime, 1209.2ms InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 198 ConstructedInterpolants, 0 QuantifiedInterpolants, 491 SizeOfPredicates, 27 NumberOfNonLiveVariables, 413 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-20 05:27:55,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a06a91f8-b0c6-4792-bd45-0968e7ea145f/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...