./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI --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 c8aa0f6d603c21abbc49650bbaaea4f693aff7f0 ........................................................................................................................................................................................................................................................................................................... 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_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI --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 c8aa0f6d603c21abbc49650bbaaea4f693aff7f0 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 0.2.0-7b2dab5 [2021-10-11 02:33:05,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:33:05,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:33:05,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:33:05,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:33:05,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:33:05,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:33:05,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:33:05,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:33:05,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:33:05,993 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:33:05,994 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:33:05,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:33:05,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:33:06,000 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:33:06,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:33:06,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:33:06,007 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:33:06,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:33:06,018 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:33:06,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:33:06,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:33:06,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:33:06,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:33:06,035 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:33:06,036 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:33:06,036 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:33:06,038 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:33:06,039 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:33:06,040 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:33:06,040 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:33:06,041 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:33:06,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:33:06,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:33:06,046 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:33:06,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:33:06,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:33:06,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:33:06,047 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:33:06,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:33:06,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:33:06,052 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:33:06,095 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:33:06,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:33:06,096 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:33:06,096 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:33:06,097 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:33:06,097 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:33:06,097 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:33:06,097 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:33:06,097 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:33:06,098 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:33:06,099 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:33:06,099 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:33:06,099 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:33:06,099 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:33:06,100 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:33:06,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:33:06,101 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:33:06,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:33:06,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:33:06,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:33:06,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:33:06,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:33:06,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:33:06,102 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:33:06,102 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:33:06,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:33:06,103 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:33:06,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:33:06,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:33:06,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:33:06,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:33:06,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:33:06,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:33:06,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:33:06,106 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:33:06,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:33:06,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:33:06,107 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:33:06,107 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:33:06,107 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_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8aa0f6d603c21abbc49650bbaaea4f693aff7f0 [2021-10-11 02:33:06,408 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:33:06,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:33:06,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:33:06,450 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:33:06,451 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:33:06,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2021-10-11 02:33:06,526 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/data/d1d4e8692/3e9337105481499cadbdc0cafa41c9bf/FLAG7cc5d5516 [2021-10-11 02:33:07,131 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:33:07,132 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2021-10-11 02:33:07,148 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/data/d1d4e8692/3e9337105481499cadbdc0cafa41c9bf/FLAG7cc5d5516 [2021-10-11 02:33:07,469 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/data/d1d4e8692/3e9337105481499cadbdc0cafa41c9bf [2021-10-11 02:33:07,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:33:07,474 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:33:07,476 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:33:07,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:33:07,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:33:07,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:33:07" (1/1) ... [2021-10-11 02:33:07,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@242c0290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:07, skipping insertion in model container [2021-10-11 02:33:07,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:33:07" (1/1) ... [2021-10-11 02:33:07,493 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:33:07,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:33:07,697 WARN L226 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_c9a30430-7866-429f-8682-f318eba8e5fc/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c[1958,1971] [2021-10-11 02:33:07,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:33:07,712 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:33:07,742 WARN L226 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_c9a30430-7866-429f-8682-f318eba8e5fc/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c[1958,1971] [2021-10-11 02:33:07,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:33:07,762 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:33:07,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:07 WrapperNode [2021-10-11 02:33:07,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:33:07,764 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:33:07,765 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:33:07,765 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:33:07,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:07" (1/1) ... [2021-10-11 02:33:07,784 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:07" (1/1) ... [2021-10-11 02:33:07,808 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:33:07,809 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:33:07,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:33:07,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:33:07,819 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:07" (1/1) ... [2021-10-11 02:33:07,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:07" (1/1) ... [2021-10-11 02:33:07,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:07" (1/1) ... [2021-10-11 02:33:07,824 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:07" (1/1) ... [2021-10-11 02:33:07,832 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:07" (1/1) ... [2021-10-11 02:33:07,838 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:07" (1/1) ... [2021-10-11 02:33:07,840 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:07" (1/1) ... [2021-10-11 02:33:07,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:33:07,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:33:07,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:33:07,846 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:33:07,847 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:07" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:33:07,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:33:07,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:33:07,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-10-11 02:33:07,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:33:07,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:33:07,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:33:07,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:33:08,856 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:33:08,856 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-11 02:33:08,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:33:08 BoogieIcfgContainer [2021-10-11 02:33:08,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:33:08,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:33:08,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:33:08,865 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:33:08,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:33:07" (1/3) ... [2021-10-11 02:33:08,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e5b5489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:33:08, skipping insertion in model container [2021-10-11 02:33:08,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:07" (2/3) ... [2021-10-11 02:33:08,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e5b5489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:33:08, skipping insertion in model container [2021-10-11 02:33:08,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:33:08" (3/3) ... [2021-10-11 02:33:08,869 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1232b.c [2021-10-11 02:33:08,884 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:33:08,888 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:33:08,899 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:33:08,938 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:33:08,938 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:33:08,938 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:33:08,938 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:33:08,938 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:33:08,938 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:33:08,939 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:33:08,939 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:33:08,954 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2021-10-11 02:33:08,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:33:08,959 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:08,960 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:08,960 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:08,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:08,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1433219361, now seen corresponding path program 1 times [2021-10-11 02:33:08,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:08,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311987715] [2021-10-11 02:33:08,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:09,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:09,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311987715] [2021-10-11 02:33:09,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:09,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:33:09,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538785265] [2021-10-11 02:33:09,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 02:33:09,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:09,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 02:33:09,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:33:09,191 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2021-10-11 02:33:09,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:09,210 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2021-10-11 02:33:09,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:33:09,213 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2021-10-11 02:33:09,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:09,232 INFO L225 Difference]: With dead ends: 35 [2021-10-11 02:33:09,232 INFO L226 Difference]: Without dead ends: 16 [2021-10-11 02:33:09,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:33:09,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-11 02:33:09,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-11 02:33:09,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-11 02:33:09,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-10-11 02:33:09,278 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 8 [2021-10-11 02:33:09,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:09,278 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-10-11 02:33:09,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 02:33:09,279 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-10-11 02:33:09,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:33:09,280 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:09,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:09,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:33:09,280 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:09,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:09,284 INFO L82 PathProgramCache]: Analyzing trace with hash -2131701560, now seen corresponding path program 1 times [2021-10-11 02:33:09,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:09,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930735452] [2021-10-11 02:33:09,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:33:09,380 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:33:09,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:33:09,461 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:33:09,505 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:33:09,505 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:33:09,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:33:09,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:33:09 BoogieIcfgContainer [2021-10-11 02:33:09,544 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:33:09,545 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:33:09,546 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:33:09,546 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:33:09,547 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:33:08" (3/4) ... [2021-10-11 02:33:09,550 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 02:33:09,550 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:33:09,554 INFO L168 Benchmark]: Toolchain (without parser) took 2077.44 ms. Allocated memory is still 98.6 MB. Free memory was 68.0 MB in the beginning and 64.5 MB in the end (delta: 3.4 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:09,556 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 79.7 MB. Free memory was 44.5 MB in the beginning and 44.5 MB in the end (delta: 40.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:33:09,557 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.03 ms. Allocated memory is still 98.6 MB. Free memory was 67.7 MB in the beginning and 57.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:09,559 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.45 ms. Allocated memory is still 98.6 MB. Free memory was 56.9 MB in the beginning and 55.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:09,560 INFO L168 Benchmark]: Boogie Preprocessor took 34.79 ms. Allocated memory is still 98.6 MB. Free memory was 55.1 MB in the beginning and 53.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:33:09,561 INFO L168 Benchmark]: RCFGBuilder took 1014.81 ms. Allocated memory is still 98.6 MB. Free memory was 53.6 MB in the beginning and 49.9 MB in the end (delta: 3.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:09,561 INFO L168 Benchmark]: TraceAbstraction took 683.13 ms. Allocated memory is still 98.6 MB. Free memory was 49.3 MB in the beginning and 65.0 MB in the end (delta: -15.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:33:09,564 INFO L168 Benchmark]: Witness Printer took 5.10 ms. Allocated memory is still 98.6 MB. Free memory was 65.0 MB in the beginning and 64.5 MB in the end (delta: 468.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:33:09,574 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 79.7 MB. Free memory was 44.5 MB in the beginning and 44.5 MB in the end (delta: 40.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 287.03 ms. Allocated memory is still 98.6 MB. Free memory was 67.7 MB in the beginning and 57.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.45 ms. Allocated memory is still 98.6 MB. Free memory was 56.9 MB in the beginning and 55.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.79 ms. Allocated memory is still 98.6 MB. Free memory was 55.1 MB in the beginning and 53.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1014.81 ms. Allocated memory is still 98.6 MB. Free memory was 53.6 MB in the beginning and 49.9 MB in the end (delta: 3.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 683.13 ms. Allocated memory is still 98.6 MB. Free memory was 49.3 MB in the beginning and 65.0 MB in the end (delta: -15.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 5.10 ms. Allocated memory is still 98.6 MB. Free memory was 65.0 MB in the beginning and 64.5 MB in the end (delta: 468.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 82]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 81, overapproximation of someUnaryDOUBLEoperation at line 76. Possible FailurePath: [L76] double x = -0.0; [L77] double y = 0.0; [L21] __uint32_t msw, lsw; [L24] ieee_double_shape_type ew_u; [L25] ew_u.value = (x) [L26] EXPR ew_u.parts.msw [L26] (msw) = ew_u.parts.msw [L27] EXPR ew_u.parts.lsw [L27] (lsw) = ew_u.parts.lsw [L30-L31] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L33-L34] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L36-L37] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L40-L41] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L44] return 0; [L48] COND TRUE __fpclassify_double(x) == 0 [L49] return y; [L78] double res = fmin_double(x, y); [L81] EXPR res == -0.0 && __signbit_double(res) == 1 [L81] COND TRUE !(res == -0.0 && __signbit_double(res) == 1) [L82] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 49 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 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:33:12,144 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:33:12,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:33:12,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:33:12,182 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:33:12,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:33:12,194 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:33:12,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:33:12,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:33:12,200 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:33:12,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:33:12,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:33:12,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:33:12,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:33:12,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:33:12,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:33:12,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:33:12,210 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:33:12,212 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:33:12,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:33:12,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:33:12,218 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:33:12,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:33:12,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:33:12,224 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:33:12,224 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:33:12,225 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:33:12,226 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:33:12,226 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:33:12,228 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:33:12,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:33:12,229 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:33:12,230 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:33:12,231 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:33:12,232 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:33:12,233 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:33:12,233 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:33:12,234 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:33:12,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:33:12,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:33:12,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:33:12,237 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-11 02:33:12,262 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:33:12,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:33:12,266 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:33:12,267 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:33:12,267 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:33:12,267 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:33:12,268 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:33:12,268 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:33:12,268 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:33:12,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:33:12,270 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:33:12,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:33:12,271 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:33:12,271 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:33:12,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:33:12,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:33:12,272 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:33:12,272 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-11 02:33:12,272 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-11 02:33:12,272 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:33:12,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:33:12,273 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:33:12,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:33:12,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:33:12,273 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 02:33:12,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:33:12,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:33:12,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:33:12,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:33:12,275 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:33:12,275 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-11 02:33:12,275 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-11 02:33:12,275 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:33:12,275 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:33:12,276 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:33:12,276 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_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8aa0f6d603c21abbc49650bbaaea4f693aff7f0 [2021-10-11 02:33:12,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:33:12,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:33:12,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:33:12,751 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:33:12,752 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:33:12,755 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2021-10-11 02:33:12,835 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/data/7092d2d9d/9060b4c569c149c5aa46b07439f10aa8/FLAG6132635ba [2021-10-11 02:33:13,553 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:33:13,553 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c [2021-10-11 02:33:13,563 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/data/7092d2d9d/9060b4c569c149c5aa46b07439f10aa8/FLAG6132635ba [2021-10-11 02:33:13,861 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/data/7092d2d9d/9060b4c569c149c5aa46b07439f10aa8 [2021-10-11 02:33:13,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:33:13,866 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:33:13,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:33:13,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:33:13,888 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:33:13,889 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:33:13" (1/1) ... [2021-10-11 02:33:13,891 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7af3dc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:13, skipping insertion in model container [2021-10-11 02:33:13,891 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:33:13" (1/1) ... [2021-10-11 02:33:13,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:33:13,919 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:33:14,076 WARN L226 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_c9a30430-7866-429f-8682-f318eba8e5fc/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c[1958,1971] [2021-10-11 02:33:14,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:33:14,093 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:33:14,152 WARN L226 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_c9a30430-7866-429f-8682-f318eba8e5fc/sv-benchmarks/c/float-newlib/double_req_bl_1232b.c[1958,1971] [2021-10-11 02:33:14,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:33:14,184 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:33:14,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:14 WrapperNode [2021-10-11 02:33:14,185 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:33:14,186 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:33:14,187 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:33:14,187 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:33:14,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:14" (1/1) ... [2021-10-11 02:33:14,208 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:14" (1/1) ... [2021-10-11 02:33:14,239 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:33:14,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:33:14,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:33:14,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:33:14,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:14" (1/1) ... [2021-10-11 02:33:14,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:14" (1/1) ... [2021-10-11 02:33:14,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:14" (1/1) ... [2021-10-11 02:33:14,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:14" (1/1) ... [2021-10-11 02:33:14,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:14" (1/1) ... [2021-10-11 02:33:14,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:14" (1/1) ... [2021-10-11 02:33:14,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:14" (1/1) ... [2021-10-11 02:33:14,326 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:33:14,331 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:33:14,334 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:33:14,334 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:33:14,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:14" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:33:14,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2021-10-11 02:33:14,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-11 02:33:14,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:33:14,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-11 02:33:14,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:33:14,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:33:14,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:33:14,975 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:33:14,975 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-11 02:33:14,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:33:14 BoogieIcfgContainer [2021-10-11 02:33:14,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:33:15,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:33:15,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:33:15,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:33:15,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:33:13" (1/3) ... [2021-10-11 02:33:15,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2affb5cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:33:15, skipping insertion in model container [2021-10-11 02:33:15,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:33:14" (2/3) ... [2021-10-11 02:33:15,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2affb5cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:33:15, skipping insertion in model container [2021-10-11 02:33:15,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:33:14" (3/3) ... [2021-10-11 02:33:15,010 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1232b.c [2021-10-11 02:33:15,026 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:33:15,030 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:33:15,043 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:33:15,071 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:33:15,071 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:33:15,071 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:33:15,071 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:33:15,072 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:33:15,072 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:33:15,072 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:33:15,072 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:33:15,091 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2021-10-11 02:33:15,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:33:15,097 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:15,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:15,099 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:15,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:15,105 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2021-10-11 02:33:15,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:33:15,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1808841959] [2021-10-11 02:33:15,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2021-10-11 02:33:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:15,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-11 02:33:15,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:15,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:15,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:33:15,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1808841959] [2021-10-11 02:33:15,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:15,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:33:15,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136179966] [2021-10-11 02:33:15,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 02:33:15,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:33:15,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 02:33:15,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:33:15,352 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2021-10-11 02:33:15,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:15,372 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2021-10-11 02:33:15,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:33:15,374 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2021-10-11 02:33:15,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:15,384 INFO L225 Difference]: With dead ends: 62 [2021-10-11 02:33:15,385 INFO L226 Difference]: Without dead ends: 29 [2021-10-11 02:33:15,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:33:15,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-11 02:33:15,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-11 02:33:15,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-11 02:33:15,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-10-11 02:33:15,426 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2021-10-11 02:33:15,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:15,426 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-10-11 02:33:15,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 02:33:15,427 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-10-11 02:33:15,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:33:15,428 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:15,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:15,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2021-10-11 02:33:15,648 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:15,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:15,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2021-10-11 02:33:15,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:33:15,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1295453149] [2021-10-11 02:33:15,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2021-10-11 02:33:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:15,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:33:15,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:15,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:33:15,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1295453149] [2021-10-11 02:33:15,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:15,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:33:15,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088684687] [2021-10-11 02:33:15,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:33:15,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:33:15,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:33:15,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:15,832 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2021-10-11 02:33:15,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:15,950 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2021-10-11 02:33:15,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:33:15,952 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-10-11 02:33:15,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:15,955 INFO L225 Difference]: With dead ends: 53 [2021-10-11 02:33:15,955 INFO L226 Difference]: Without dead ends: 44 [2021-10-11 02:33:15,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:33:15,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-11 02:33:15,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2021-10-11 02:33:15,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 02:33:15,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-11 02:33:15,970 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2021-10-11 02:33:15,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:15,972 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-11 02:33:15,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:33:15,975 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-11 02:33:15,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:33:15,977 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:15,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:16,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2021-10-11 02:33:16,192 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:16,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:16,194 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2021-10-11 02:33:16,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:33:16,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1726861664] [2021-10-11 02:33:16,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2021-10-11 02:33:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:16,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-11 02:33:16,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:16,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:33:16,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1726861664] [2021-10-11 02:33:16,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:16,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:33:16,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485669767] [2021-10-11 02:33:16,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:33:16,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:33:16,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:33:16,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:16,454 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2021-10-11 02:33:16,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:16,569 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2021-10-11 02:33:16,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:33:16,570 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2021-10-11 02:33:16,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:16,571 INFO L225 Difference]: With dead ends: 61 [2021-10-11 02:33:16,571 INFO L226 Difference]: Without dead ends: 39 [2021-10-11 02:33:16,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:33:16,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-11 02:33:16,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2021-10-11 02:33:16,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-11 02:33:16,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-10-11 02:33:16,578 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 12 [2021-10-11 02:33:16,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:16,578 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-10-11 02:33:16,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:33:16,579 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-10-11 02:33:16,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-11 02:33:16,579 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:16,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:16,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2021-10-11 02:33:16,801 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:16,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:16,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2021-10-11 02:33:16,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:33:16,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468056266] [2021-10-11 02:33:16,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2021-10-11 02:33:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:16,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:33:16,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:16,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:16,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:33:16,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468056266] [2021-10-11 02:33:16,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:16,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:33:16,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632495875] [2021-10-11 02:33:16,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:33:16,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:33:16,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:33:16,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:16,914 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 4 states. [2021-10-11 02:33:16,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:16,977 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2021-10-11 02:33:16,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:33:16,978 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2021-10-11 02:33:16,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:16,982 INFO L225 Difference]: With dead ends: 52 [2021-10-11 02:33:16,982 INFO L226 Difference]: Without dead ends: 43 [2021-10-11 02:33:16,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:33:16,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-11 02:33:16,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2021-10-11 02:33:16,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-11 02:33:16,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-10-11 02:33:16,995 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 13 [2021-10-11 02:33:16,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:16,996 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-10-11 02:33:16,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:33:16,998 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-10-11 02:33:16,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-11 02:33:17,000 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:17,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:17,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2021-10-11 02:33:17,213 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:17,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:17,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2021-10-11 02:33:17,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:33:17,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837527613] [2021-10-11 02:33:17,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2021-10-11 02:33:17,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:17,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:33:17,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:17,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:33:17,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837527613] [2021-10-11 02:33:17,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:17,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:33:17,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755224116] [2021-10-11 02:33:17,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:33:17,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:33:17,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:33:17,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:17,332 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 4 states. [2021-10-11 02:33:17,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:17,388 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2021-10-11 02:33:17,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:33:17,389 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2021-10-11 02:33:17,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:17,390 INFO L225 Difference]: With dead ends: 52 [2021-10-11 02:33:17,390 INFO L226 Difference]: Without dead ends: 43 [2021-10-11 02:33:17,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:33:17,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-11 02:33:17,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2021-10-11 02:33:17,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-11 02:33:17,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-10-11 02:33:17,395 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 16 [2021-10-11 02:33:17,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:17,396 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-10-11 02:33:17,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:33:17,396 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-10-11 02:33:17,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-11 02:33:17,396 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:17,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:17,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2021-10-11 02:33:17,616 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:17,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:17,616 INFO L82 PathProgramCache]: Analyzing trace with hash 874935118, now seen corresponding path program 1 times [2021-10-11 02:33:17,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:33:17,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1015171799] [2021-10-11 02:33:17,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2021-10-11 02:33:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:17,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-11 02:33:17,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:17,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:17,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:33:17,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1015171799] [2021-10-11 02:33:17,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:17,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 02:33:17,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070861095] [2021-10-11 02:33:17,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:33:17,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:33:17,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:33:17,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:33:17,813 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2021-10-11 02:33:17,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:17,927 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2021-10-11 02:33:17,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:33:17,931 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2021-10-11 02:33:17,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:17,931 INFO L225 Difference]: With dead ends: 43 [2021-10-11 02:33:17,931 INFO L226 Difference]: Without dead ends: 29 [2021-10-11 02:33:17,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:33:17,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-11 02:33:17,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-11 02:33:17,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-11 02:33:17,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-10-11 02:33:17,937 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2021-10-11 02:33:17,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:17,937 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-10-11 02:33:17,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:33:17,937 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-10-11 02:33:17,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 02:33:17,938 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:17,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:18,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2021-10-11 02:33:18,139 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:18,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:18,139 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2021-10-11 02:33:18,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:33:18,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768840893] [2021-10-11 02:33:18,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2021-10-11 02:33:18,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:18,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 02:33:18,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:18,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:18,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:33:18,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768840893] [2021-10-11 02:33:18,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:18,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:33:18,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144051624] [2021-10-11 02:33:18,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:33:18,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:33:18,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:33:18,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:33:18,262 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 3 states. [2021-10-11 02:33:18,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:18,275 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-10-11 02:33:18,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:33:18,276 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2021-10-11 02:33:18,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:18,276 INFO L225 Difference]: With dead ends: 39 [2021-10-11 02:33:18,276 INFO L226 Difference]: Without dead ends: 29 [2021-10-11 02:33:18,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:33:18,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-11 02:33:18,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-11 02:33:18,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-11 02:33:18,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-10-11 02:33:18,281 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 18 [2021-10-11 02:33:18,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:18,282 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-10-11 02:33:18,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:33:18,282 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-10-11 02:33:18,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 02:33:18,283 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:18,283 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:18,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2021-10-11 02:33:18,505 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:18,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:18,505 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2021-10-11 02:33:18,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:33:18,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [377748328] [2021-10-11 02:33:18,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2021-10-11 02:33:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:18,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 02:33:18,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:18,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:18,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:33:18,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [377748328] [2021-10-11 02:33:18,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:18,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-11 02:33:18,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463904241] [2021-10-11 02:33:18,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:33:18,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:33:18,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:33:18,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:33:18,711 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 6 states. [2021-10-11 02:33:18,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:18,838 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2021-10-11 02:33:18,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:33:18,838 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2021-10-11 02:33:18,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:18,839 INFO L225 Difference]: With dead ends: 41 [2021-10-11 02:33:18,839 INFO L226 Difference]: Without dead ends: 38 [2021-10-11 02:33:18,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:33:18,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-11 02:33:18,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2021-10-11 02:33:18,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 02:33:18,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-10-11 02:33:18,844 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 18 [2021-10-11 02:33:18,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:18,844 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-10-11 02:33:18,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:33:18,845 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-10-11 02:33:18,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 02:33:18,846 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:18,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:19,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2021-10-11 02:33:19,065 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:19,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:19,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1049593954, now seen corresponding path program 1 times [2021-10-11 02:33:19,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:33:19,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1360166385] [2021-10-11 02:33:19,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2021-10-11 02:33:19,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:19,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:33:19,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:19,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:19,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:33:19,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1360166385] [2021-10-11 02:33:19,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:19,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:33:19,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741566059] [2021-10-11 02:33:19,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:33:19,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:33:19,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:33:19,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:33:19,204 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 4 states. [2021-10-11 02:33:19,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:19,265 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2021-10-11 02:33:19,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:33:19,268 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-10-11 02:33:19,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:19,272 INFO L225 Difference]: With dead ends: 51 [2021-10-11 02:33:19,272 INFO L226 Difference]: Without dead ends: 42 [2021-10-11 02:33:19,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:33:19,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-11 02:33:19,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 27. [2021-10-11 02:33:19,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-11 02:33:19,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-11 02:33:19,279 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 18 [2021-10-11 02:33:19,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:19,279 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-11 02:33:19,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:33:19,279 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-11 02:33:19,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-11 02:33:19,280 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:19,280 INFO L422 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] [2021-10-11 02:33:19,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2021-10-11 02:33:19,481 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:33:19,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:19,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2021-10-11 02:33:19,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:33:19,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1780448209] [2021-10-11 02:33:19,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2021-10-11 02:33:19,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:33:19,639 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:33:19,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:33:19,745 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:33:19,798 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-11 02:33:19,798 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:33:20,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2021-10-11 02:33:20,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:33:20 BoogieIcfgContainer [2021-10-11 02:33:20,048 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:33:20,049 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:33:20,049 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:33:20,049 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:33:20,049 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:33:14" (3/4) ... [2021-10-11 02:33:20,060 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:33:20,113 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9a30430-7866-429f-8682-f318eba8e5fc/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:33:20,113 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:33:20,115 INFO L168 Benchmark]: Toolchain (without parser) took 6247.95 ms. Allocated memory was 77.6 MB in the beginning and 104.9 MB in the end (delta: 27.3 MB). Free memory was 61.2 MB in the beginning and 83.5 MB in the end (delta: -22.3 MB). Peak memory consumption was 55.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:20,115 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 77.6 MB. Free memory is still 58.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:33:20,116 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.91 ms. Allocated memory is still 77.6 MB. Free memory was 60.9 MB in the beginning and 59.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:20,117 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.60 ms. Allocated memory is still 77.6 MB. Free memory was 59.3 MB in the beginning and 57.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:20,117 INFO L168 Benchmark]: Boogie Preprocessor took 83.23 ms. Allocated memory is still 77.6 MB. Free memory was 57.4 MB in the beginning and 55.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:33:20,118 INFO L168 Benchmark]: RCFGBuilder took 646.60 ms. Allocated memory is still 77.6 MB. Free memory was 55.8 MB in the beginning and 34.8 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:20,118 INFO L168 Benchmark]: TraceAbstraction took 5046.42 ms. Allocated memory is still 104.9 MB. Free memory was 86.8 MB in the beginning and 33.9 MB in the end (delta: 53.0 MB). Peak memory consumption was 49.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:20,119 INFO L168 Benchmark]: Witness Printer took 64.70 ms. Allocated memory is still 104.9 MB. Free memory was 33.9 MB in the beginning and 83.5 MB in the end (delta: -49.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:20,122 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 77.6 MB. Free memory is still 58.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 317.91 ms. Allocated memory is still 77.6 MB. Free memory was 60.9 MB in the beginning and 59.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 59.60 ms. Allocated memory is still 77.6 MB. Free memory was 59.3 MB in the beginning and 57.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 83.23 ms. Allocated memory is still 77.6 MB. Free memory was 57.4 MB in the beginning and 55.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 646.60 ms. Allocated memory is still 77.6 MB. Free memory was 55.8 MB in the beginning and 34.8 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5046.42 ms. Allocated memory is still 104.9 MB. Free memory was 86.8 MB in the beginning and 33.9 MB in the end (delta: 53.0 MB). Peak memory consumption was 49.3 MB. Max. memory is 16.1 GB. * Witness Printer took 64.70 ms. Allocated memory is still 104.9 MB. Free memory was 33.9 MB in the beginning and 83.5 MB in the end (delta: -49.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 82]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L76] double x = -0.0; [L77] double y = 0.0; [L21] __uint32_t msw, lsw; [L24] ieee_double_shape_type ew_u; [L25] ew_u.value = (x) [L26] EXPR ew_u.parts.msw [L26] (msw) = ew_u.parts.msw [L27] EXPR ew_u.parts.lsw [L27] (lsw) = ew_u.parts.lsw [L30-L31] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L32] return 2; [L48] COND FALSE !(__fpclassify_double(x) == 0) [L21] __uint32_t msw, lsw; [L24] ieee_double_shape_type ew_u; [L25] ew_u.value = (x) [L26] EXPR ew_u.parts.msw [L26] (msw) = ew_u.parts.msw [L27] EXPR ew_u.parts.lsw [L27] (lsw) = ew_u.parts.lsw [L30-L31] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L32] return 2; [L50] COND FALSE !(__fpclassify_double(y) == 0) [L53] EXPR x < y ? x : y [L53] return x < y ? x : y; [L78] double res = fmin_double(x, y); [L81] EXPR res == -0.0 && __signbit_double(res) == 1 [L57] __uint32_t msw; [L60] ieee_double_shape_type gh_u; [L61] gh_u.value = (x) [L62] EXPR gh_u.parts.msw [L62] (msw) = gh_u.parts.msw [L65] return (msw & 0x80000000) != 0; [L81] EXPR res == -0.0 && __signbit_double(res) == 1 [L81] COND TRUE !(res == -0.0 && __signbit_double(res) == 1) [L82] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.9s, OverallIterations: 10, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 326 SDtfs, 209 SDslu, 383 SDs, 0 SdLazy, 132 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 72 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 155 NumberOfCodeBlocks, 155 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 124 ConstructedInterpolants, 6 QuantifiedInterpolants, 5197 SizeOfPredicates, 29 NumberOfNonLiveVariables, 537 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 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! Received shutdown request...