./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 72e6a731e5f93184d8452e046ba5fa07483889ea5d4b2985d4608011d07f1d55 .............................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 72e6a731e5f93184d8452e046ba5fa07483889ea5d4b2985d4608011d07f1d55 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 09:47:44,807 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 09:47:44,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 09:47:44,868 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 09:47:44,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 09:47:44,873 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 09:47:44,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 09:47:44,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 09:47:44,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 09:47:44,892 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 09:47:44,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 09:47:44,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 09:47:44,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 09:47:44,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 09:47:44,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 09:47:44,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 09:47:44,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 09:47:44,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 09:47:44,922 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 09:47:44,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 09:47:44,936 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 09:47:44,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 09:47:44,942 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 09:47:44,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 09:47:44,954 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 09:47:44,958 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 09:47:44,959 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 09:47:44,960 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 09:47:44,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 09:47:44,964 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 09:47:44,966 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 09:47:44,967 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 09:47:44,969 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 09:47:44,971 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 09:47:44,973 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 09:47:44,974 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 09:47:44,975 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 09:47:44,975 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 09:47:44,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 09:47:44,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 09:47:44,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 09:47:44,979 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 09:47:45,018 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 09:47:45,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 09:47:45,020 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 09:47:45,020 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 09:47:45,020 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 09:47:45,021 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 09:47:45,021 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 09:47:45,021 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 09:47:45,022 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 09:47:45,022 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 09:47:45,022 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 09:47:45,022 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 09:47:45,023 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 09:47:45,023 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 09:47:45,023 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 09:47:45,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 09:47:45,025 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 09:47:45,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 09:47:45,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 09:47:45,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 09:47:45,026 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 09:47:45,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 09:47:45,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 09:47:45,027 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 09:47:45,027 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 09:47:45,027 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 09:47:45,028 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 09:47:45,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 09:47:45,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 09:47:45,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 09:47:45,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 09:47:45,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 09:47:45,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 09:47:45,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 09:47:45,030 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 09:47:45,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 09:47:45,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 09:47:45,031 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 09:47:45,031 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 09:47:45,032 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_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72e6a731e5f93184d8452e046ba5fa07483889ea5d4b2985d4608011d07f1d55 [2021-10-24 09:47:45,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 09:47:45,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 09:47:45,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 09:47:45,460 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 09:47:45,462 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 09:47:45,463 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2021-10-24 09:47:45,572 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/data/8d884f533/d0cfaf0450f84096b918a55b42f5d449/FLAG5911ffd70 [2021-10-24 09:47:46,168 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 09:47:46,169 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2021-10-24 09:47:46,177 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/data/8d884f533/d0cfaf0450f84096b918a55b42f5d449/FLAG5911ffd70 [2021-10-24 09:47:46,495 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/data/8d884f533/d0cfaf0450f84096b918a55b42f5d449 [2021-10-24 09:47:46,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 09:47:46,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 09:47:46,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 09:47:46,517 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 09:47:46,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 09:47:46,523 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:47:46" (1/1) ... [2021-10-24 09:47:46,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43d985f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:47:46, skipping insertion in model container [2021-10-24 09:47:46,526 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:47:46" (1/1) ... [2021-10-24 09:47:46,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 09:47:46,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 09:47:46,814 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c[2154,2167] [2021-10-24 09:47:46,818 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 09:47:46,833 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 09:47:46,889 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c[2154,2167] [2021-10-24 09:47:46,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 09:47:46,913 INFO L208 MainTranslator]: Completed translation [2021-10-24 09:47:46,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:47:46 WrapperNode [2021-10-24 09:47:46,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 09:47:46,917 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 09:47:46,917 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 09:47:46,917 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 09:47:46,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:47:46" (1/1) ... [2021-10-24 09:47:46,950 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:47:46" (1/1) ... [2021-10-24 09:47:46,996 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 09:47:46,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 09:47:46,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 09:47:46,999 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 09:47:47,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:47:46" (1/1) ... [2021-10-24 09:47:47,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:47:46" (1/1) ... [2021-10-24 09:47:47,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:47:46" (1/1) ... [2021-10-24 09:47:47,019 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:47:46" (1/1) ... [2021-10-24 09:47:47,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:47:46" (1/1) ... [2021-10-24 09:47:47,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:47:46" (1/1) ... [2021-10-24 09:47:47,056 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:47:46" (1/1) ... [2021-10-24 09:47:47,064 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 09:47:47,070 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 09:47:47,070 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 09:47:47,070 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 09:47:47,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:47:46" (1/1) ... [2021-10-24 09:47:47,083 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 09:47:47,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 09:47:47,119 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 09:47:47,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 09:47:47,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-24 09:47:47,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 09:47:47,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-10-24 09:47:47,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 09:47:47,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 09:47:47,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-24 09:47:47,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-24 09:47:48,010 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 09:47:48,011 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-24 09:47:48,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:47:48 BoogieIcfgContainer [2021-10-24 09:47:48,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 09:47:48,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 09:47:48,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 09:47:48,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 09:47:48,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 09:47:46" (1/3) ... [2021-10-24 09:47:48,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c8eddc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 09:47:48, skipping insertion in model container [2021-10-24 09:47:48,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:47:46" (2/3) ... [2021-10-24 09:47:48,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c8eddc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 09:47:48, skipping insertion in model container [2021-10-24 09:47:48,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:47:48" (3/3) ... [2021-10-24 09:47:48,042 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1252b.c [2021-10-24 09:47:48,049 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 09:47:48,049 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 09:47:48,134 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 09:47:48,156 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-24 09:47:48,156 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-24 09:47:48,176 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:47:48,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-24 09:47:48,183 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:47:48,184 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 09:47:48,185 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:47:48,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:47:48,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1347970808, now seen corresponding path program 1 times [2021-10-24 09:47:48,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 09:47:48,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327836180] [2021-10-24 09:47:48,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:47:48,216 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 09:47:48,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:47:48,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:47:48,381 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 09:47:48,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327836180] [2021-10-24 09:47:48,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327836180] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 09:47:48,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:47:48,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 09:47:48,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477667802] [2021-10-24 09:47:48,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-24 09:47:48,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 09:47:48,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-24 09:47:48,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 09:47:48,409 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:47:48,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:47:48,424 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2021-10-24 09:47:48,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-24 09:47:48,426 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-24 09:47:48,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:47:48,434 INFO L225 Difference]: With dead ends: 35 [2021-10-24 09:47:48,435 INFO L226 Difference]: Without dead ends: 16 [2021-10-24 09:47:48,437 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 09:47:48,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-24 09:47:48,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-24 09:47:48,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:47:48,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-10-24 09:47:48,473 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 8 [2021-10-24 09:47:48,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:47:48,473 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-10-24 09:47:48,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:47:48,474 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-10-24 09:47:48,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-24 09:47:48,475 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:47:48,475 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 09:47:48,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 09:47:48,476 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:47:48,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:47:48,477 INFO L82 PathProgramCache]: Analyzing trace with hash 126778065, now seen corresponding path program 1 times [2021-10-24 09:47:48,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 09:47:48,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828224351] [2021-10-24 09:47:48,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:47:48,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 09:47:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 09:47:48,545 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-24 09:47:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 09:47:48,618 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-24 09:47:48,619 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-24 09:47:48,621 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 09:47:48,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-24 09:47:48,636 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 09:47:48,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 09:47:48 BoogieIcfgContainer [2021-10-24 09:47:48,678 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 09:47:48,679 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 09:47:48,679 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 09:47:48,679 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 09:47:48,681 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:47:48" (3/4) ... [2021-10-24 09:47:48,685 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-24 09:47:48,686 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 09:47:48,689 INFO L168 Benchmark]: Toolchain (without parser) took 2187.51 ms. Allocated memory was 88.1 MB in the beginning and 125.8 MB in the end (delta: 37.7 MB). Free memory was 50.7 MB in the beginning and 83.3 MB in the end (delta: -32.6 MB). Peak memory consumption was 6.2 MB. Max. memory is 16.1 GB. [2021-10-24 09:47:48,690 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 88.1 MB. Free memory is still 67.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 09:47:48,694 INFO L168 Benchmark]: CACSL2BoogieTranslator took 399.03 ms. Allocated memory was 88.1 MB in the beginning and 125.8 MB in the end (delta: 37.7 MB). Free memory was 50.5 MB in the beginning and 100.6 MB in the end (delta: -50.1 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2021-10-24 09:47:48,697 INFO L168 Benchmark]: Boogie Procedure Inliner took 79.66 ms. Allocated memory is still 125.8 MB. Free memory was 100.6 MB in the beginning and 98.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 09:47:48,703 INFO L168 Benchmark]: Boogie Preprocessor took 71.43 ms. Allocated memory is still 125.8 MB. Free memory was 98.9 MB in the beginning and 97.3 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 09:47:48,704 INFO L168 Benchmark]: RCFGBuilder took 947.54 ms. Allocated memory is still 125.8 MB. Free memory was 97.3 MB in the beginning and 73.7 MB in the end (delta: 23.6 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-24 09:47:48,707 INFO L168 Benchmark]: TraceAbstraction took 658.14 ms. Allocated memory is still 125.8 MB. Free memory was 73.3 MB in the beginning and 83.3 MB in the end (delta: -10.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 09:47:48,707 INFO L168 Benchmark]: Witness Printer took 7.13 ms. Allocated memory is still 125.8 MB. Free memory is still 83.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 09:47:48,716 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 88.1 MB. Free memory is still 67.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 399.03 ms. Allocated memory was 88.1 MB in the beginning and 125.8 MB in the end (delta: 37.7 MB). Free memory was 50.5 MB in the beginning and 100.6 MB in the end (delta: -50.1 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 79.66 ms. Allocated memory is still 125.8 MB. Free memory was 100.6 MB in the beginning and 98.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 71.43 ms. Allocated memory is still 125.8 MB. Free memory was 98.9 MB in the beginning and 97.3 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 947.54 ms. Allocated memory is still 125.8 MB. Free memory was 97.3 MB in the beginning and 73.7 MB in the end (delta: 23.6 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 658.14 ms. Allocated memory is still 125.8 MB. Free memory was 73.3 MB in the beginning and 83.3 MB in the end (delta: -10.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 7.13 ms. Allocated memory is still 125.8 MB. Free memory is still 83.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 87]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 86, overapproximation of someUnaryDOUBLEoperation at line 82. Possible FailurePath: [L81] double x = 0.0; [L82] double y = -0.0; [L26] __uint32_t msw, lsw; [L29] ieee_double_shape_type ew_u; [L30] ew_u.value = (x) [L31] EXPR ew_u.parts.msw [L31] (msw) = ew_u.parts.msw [L32] EXPR ew_u.parts.lsw [L32] (lsw) = ew_u.parts.lsw [L35-L36] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L38-L39] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L41-L42] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L45-L46] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L49] return 0; [L54] COND TRUE __fpclassify_double(x) == 0 [L55] return y; [L83] double res = fmax_double(x, y); [L86] EXPR res == 0.0 && __signbit_double(res) == 0 [L86] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L87] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 502.1ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 12.5ms, AutomataDifference: 45.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 19 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 19.7ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 11.4ms SsaConstructionTime, 91.7ms SatisfiabilityAnalysisTime, 58.5ms InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 7 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-24 09:47:48,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 09:47:51,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 09:47:51,955 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 09:47:52,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 09:47:52,034 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 09:47:52,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 09:47:52,043 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 09:47:52,049 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 09:47:52,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 09:47:52,064 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 09:47:52,066 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 09:47:52,068 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 09:47:52,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 09:47:52,072 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 09:47:52,075 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 09:47:52,081 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 09:47:52,083 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 09:47:52,084 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 09:47:52,087 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 09:47:52,097 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 09:47:52,100 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 09:47:52,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 09:47:52,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 09:47:52,109 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 09:47:52,121 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 09:47:52,122 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 09:47:52,122 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 09:47:52,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 09:47:52,126 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 09:47:52,127 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 09:47:52,128 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 09:47:52,129 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 09:47:52,132 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 09:47:52,133 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 09:47:52,135 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 09:47:52,135 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 09:47:52,145 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 09:47:52,145 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 09:47:52,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 09:47:52,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 09:47:52,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 09:47:52,156 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-24 09:47:52,217 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 09:47:52,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 09:47:52,220 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 09:47:52,220 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 09:47:52,221 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 09:47:52,221 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 09:47:52,221 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 09:47:52,222 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 09:47:52,222 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 09:47:52,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 09:47:52,226 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 09:47:52,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 09:47:52,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 09:47:52,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 09:47:52,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 09:47:52,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 09:47:52,228 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 09:47:52,228 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-24 09:47:52,228 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-24 09:47:52,229 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 09:47:52,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 09:47:52,229 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 09:47:52,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 09:47:52,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 09:47:52,230 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-24 09:47:52,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 09:47:52,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 09:47:52,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 09:47:52,232 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 09:47:52,232 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 09:47:52,232 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-24 09:47:52,233 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-24 09:47:52,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 09:47:52,233 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 09:47:52,234 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 09:47:52,235 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_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72e6a731e5f93184d8452e046ba5fa07483889ea5d4b2985d4608011d07f1d55 [2021-10-24 09:47:52,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 09:47:52,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 09:47:52,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 09:47:52,748 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 09:47:52,749 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 09:47:52,750 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2021-10-24 09:47:52,831 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/data/380650628/1e8f1d4788ee44268baccf6e3942a3bf/FLAG7a32669a1 [2021-10-24 09:47:53,561 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 09:47:53,566 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2021-10-24 09:47:53,576 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/data/380650628/1e8f1d4788ee44268baccf6e3942a3bf/FLAG7a32669a1 [2021-10-24 09:47:53,873 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/data/380650628/1e8f1d4788ee44268baccf6e3942a3bf [2021-10-24 09:47:53,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 09:47:53,891 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 09:47:53,895 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 09:47:53,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 09:47:53,899 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 09:47:53,900 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:47:53" (1/1) ... [2021-10-24 09:47:53,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e836316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:47:53, skipping insertion in model container [2021-10-24 09:47:53,902 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:47:53" (1/1) ... [2021-10-24 09:47:53,911 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 09:47:53,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 09:47:54,145 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c[2154,2167] [2021-10-24 09:47:54,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 09:47:54,165 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 09:47:54,196 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c[2154,2167] [2021-10-24 09:47:54,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 09:47:54,237 INFO L208 MainTranslator]: Completed translation [2021-10-24 09:47:54,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:47:54 WrapperNode [2021-10-24 09:47:54,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 09:47:54,240 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 09:47:54,240 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 09:47:54,240 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 09:47:54,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:47:54" (1/1) ... [2021-10-24 09:47:54,278 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:47:54" (1/1) ... [2021-10-24 09:47:54,333 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 09:47:54,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 09:47:54,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 09:47:54,337 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 09:47:54,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:47:54" (1/1) ... [2021-10-24 09:47:54,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:47:54" (1/1) ... [2021-10-24 09:47:54,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:47:54" (1/1) ... [2021-10-24 09:47:54,375 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:47:54" (1/1) ... [2021-10-24 09:47:54,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:47:54" (1/1) ... [2021-10-24 09:47:54,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:47:54" (1/1) ... [2021-10-24 09:47:54,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:47:54" (1/1) ... [2021-10-24 09:47:54,416 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 09:47:54,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 09:47:54,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 09:47:54,418 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 09:47:54,419 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:47:54" (1/1) ... [2021-10-24 09:47:54,428 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 09:47:54,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 09:47:54,459 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 09:47:54,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 09:47:54,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2021-10-24 09:47:54,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-24 09:47:54,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 09:47:54,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-24 09:47:54,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 09:47:54,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 09:47:54,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-24 09:47:55,104 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 09:47:55,105 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-24 09:47:55,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:47:55 BoogieIcfgContainer [2021-10-24 09:47:55,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 09:47:55,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 09:47:55,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 09:47:55,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 09:47:55,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 09:47:53" (1/3) ... [2021-10-24 09:47:55,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af62aba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 09:47:55, skipping insertion in model container [2021-10-24 09:47:55,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:47:54" (2/3) ... [2021-10-24 09:47:55,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af62aba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 09:47:55, skipping insertion in model container [2021-10-24 09:47:55,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:47:55" (3/3) ... [2021-10-24 09:47:55,119 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1252b.c [2021-10-24 09:47:55,126 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 09:47:55,126 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 09:47:55,181 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 09:47:55,188 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-24 09:47:55,189 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-24 09:47:55,204 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:47:55,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-24 09:47:55,211 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:47:55,212 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 09:47:55,212 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:47:55,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:47:55,219 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2021-10-24 09:47:55,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:47:55,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1361582836] [2021-10-24 09:47:55,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:47:55,234 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:47:55,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:47:55,238 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:47:55,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-24 09:47:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:47:55,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-24 09:47:55,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:47:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:47:55,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:47:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:47:55,543 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:47:55,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1361582836] [2021-10-24 09:47:55,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1361582836] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:47:55,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:47:55,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-24 09:47:55,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701154626] [2021-10-24 09:47:55,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-24 09:47:55,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:47:55,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-24 09:47:55,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 09:47:55,591 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:47:55,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:47:55,613 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2021-10-24 09:47:55,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-24 09:47:55,615 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-24 09:47:55,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:47:55,626 INFO L225 Difference]: With dead ends: 62 [2021-10-24 09:47:55,627 INFO L226 Difference]: Without dead ends: 29 [2021-10-24 09:47:55,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 09:47:55,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-24 09:47:55,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-24 09:47:55,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:47:55,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-10-24 09:47:55,671 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2021-10-24 09:47:55,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:47:55,671 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-10-24 09:47:55,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:47:55,672 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-10-24 09:47:55,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-24 09:47:55,673 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:47:55,673 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 09:47:55,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-24 09:47:55,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:47:55,890 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:47:55,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:47:55,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2021-10-24 09:47:55,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:47:55,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234196737] [2021-10-24 09:47:55,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:47:55,900 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:47:55,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:47:55,902 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:47:55,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-24 09:47:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:47:56,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 09:47:56,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:47:56,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:47:56,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:47:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:47:56,163 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:47:56,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234196737] [2021-10-24 09:47:56,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234196737] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:47:56,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:47:56,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-24 09:47:56,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138202226] [2021-10-24 09:47:56,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 09:47:56,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:47:56,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 09:47:56,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-24 09:47:56,174 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:47:56,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:47:56,333 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2021-10-24 09:47:56,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 09:47:56,339 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-24 09:47:56,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:47:56,342 INFO L225 Difference]: With dead ends: 68 [2021-10-24 09:47:56,345 INFO L226 Difference]: Without dead ends: 59 [2021-10-24 09:47:56,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-24 09:47:56,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-24 09:47:56,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2021-10-24 09:47:56,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:47:56,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-24 09:47:56,356 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2021-10-24 09:47:56,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:47:56,357 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-24 09:47:56,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:47:56,358 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-24 09:47:56,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-24 09:47:56,359 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:47:56,359 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 09:47:56,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-24 09:47:56,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:47:56,575 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:47:56,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:47:56,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2021-10-24 09:47:56,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:47:56,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1723583248] [2021-10-24 09:47:56,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:47:56,577 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:47:56,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:47:56,579 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:47:56,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-24 09:47:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:47:56,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 09:47:56,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:47:56,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:47:56,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:47:57,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:47:57,127 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:47:57,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1723583248] [2021-10-24 09:47:57,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1723583248] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:47:57,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:47:57,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-24 09:47:57,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531930756] [2021-10-24 09:47:57,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 09:47:57,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:47:57,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 09:47:57,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-24 09:47:57,145 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:47:57,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:47:57,327 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-10-24 09:47:57,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 09:47:57,332 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-24 09:47:57,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:47:57,333 INFO L225 Difference]: With dead ends: 52 [2021-10-24 09:47:57,333 INFO L226 Difference]: Without dead ends: 28 [2021-10-24 09:47:57,334 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 74.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-24 09:47:57,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-24 09:47:57,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-24 09:47:57,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:47:57,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-10-24 09:47:57,356 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 14 [2021-10-24 09:47:57,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:47:57,356 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-10-24 09:47:57,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:47:57,357 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-10-24 09:47:57,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-24 09:47:57,358 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:47:57,358 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 09:47:57,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-24 09:47:57,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:47:57,579 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:47:57,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:47:57,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2021-10-24 09:47:57,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:47:57,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681894990] [2021-10-24 09:47:57,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:47:57,581 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:47:57,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:47:57,582 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:47:57,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-24 09:47:57,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:47:57,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 09:47:57,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:47:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:47:57,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:47:57,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:47:57,915 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:47:57,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681894990] [2021-10-24 09:47:57,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681894990] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:47:57,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:47:57,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-24 09:47:57,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859793940] [2021-10-24 09:47:57,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 09:47:57,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:47:57,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 09:47:57,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-24 09:47:57,919 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:47:58,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:47:58,026 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2021-10-24 09:47:58,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 09:47:58,027 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-24 09:47:58,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:47:58,029 INFO L225 Difference]: With dead ends: 65 [2021-10-24 09:47:58,029 INFO L226 Difference]: Without dead ends: 56 [2021-10-24 09:47:58,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-24 09:47:58,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-24 09:47:58,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 30. [2021-10-24 09:47:58,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:47:58,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-10-24 09:47:58,038 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 16 [2021-10-24 09:47:58,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:47:58,038 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-10-24 09:47:58,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:47:58,039 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-10-24 09:47:58,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-24 09:47:58,040 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:47:58,040 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 09:47:58,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-24 09:47:58,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:47:58,255 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:47:58,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:47:58,257 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2021-10-24 09:47:58,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:47:58,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175471494] [2021-10-24 09:47:58,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:47:58,259 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:47:58,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:47:58,260 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:47:58,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-24 09:47:58,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:47:58,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-24 09:47:58,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:47:58,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:47:58,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:47:58,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:47:58,855 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:47:58,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175471494] [2021-10-24 09:47:58,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175471494] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:47:58,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:47:58,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-24 09:47:58,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847450221] [2021-10-24 09:47:58,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 09:47:58,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:47:58,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 09:47:58,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 09:47:58,857 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:47:58,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:47:58,871 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2021-10-24 09:47:58,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 09:47:58,871 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-24 09:47:58,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:47:58,872 INFO L225 Difference]: With dead ends: 40 [2021-10-24 09:47:58,873 INFO L226 Difference]: Without dead ends: 30 [2021-10-24 09:47:58,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 09:47:58,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-24 09:47:58,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-10-24 09:47:58,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:47:58,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-10-24 09:47:58,880 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 18 [2021-10-24 09:47:58,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:47:58,881 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-10-24 09:47:58,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:47:58,881 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-10-24 09:47:58,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-24 09:47:58,882 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:47:58,883 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 09:47:58,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-24 09:47:59,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:47:59,087 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:47:59,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:47:59,088 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2021-10-24 09:47:59,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:47:59,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586741918] [2021-10-24 09:47:59,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:47:59,089 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:47:59,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:47:59,093 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:47:59,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-24 09:47:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:47:59,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-24 09:47:59,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:47:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:47:59,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:47:59,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:47:59,561 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:47:59,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586741918] [2021-10-24 09:47:59,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586741918] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:47:59,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:47:59,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-10-24 09:47:59,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701619808] [2021-10-24 09:47:59,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 09:47:59,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:47:59,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 09:47:59,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-24 09:47:59,572 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:47:59,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:47:59,728 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-10-24 09:47:59,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 09:47:59,729 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-24 09:47:59,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:47:59,730 INFO L225 Difference]: With dead ends: 42 [2021-10-24 09:47:59,730 INFO L226 Difference]: Without dead ends: 39 [2021-10-24 09:47:59,731 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 162.7ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-24 09:47:59,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-24 09:47:59,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2021-10-24 09:47:59,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:47:59,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-10-24 09:47:59,737 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 18 [2021-10-24 09:47:59,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:47:59,738 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-10-24 09:47:59,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:47:59,738 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-10-24 09:47:59,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-24 09:47:59,739 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:47:59,739 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 09:47:59,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-24 09:47:59,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:47:59,956 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:47:59,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:47:59,957 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2021-10-24 09:47:59,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:47:59,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [505172865] [2021-10-24 09:47:59,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:47:59,958 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:47:59,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:47:59,959 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:47:59,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-24 09:48:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:48:00,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 09:48:00,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:48:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:48:00,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:48:00,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:48:00,794 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:48:00,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [505172865] [2021-10-24 09:48:00,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [505172865] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:48:00,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:48:00,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-24 09:48:00,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999563416] [2021-10-24 09:48:00,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 09:48:00,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:48:00,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 09:48:00,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-24 09:48:00,798 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:48:00,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:48:00,894 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-10-24 09:48:00,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 09:48:00,900 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-24 09:48:00,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:48:00,900 INFO L225 Difference]: With dead ends: 45 [2021-10-24 09:48:00,901 INFO L226 Difference]: Without dead ends: 27 [2021-10-24 09:48:00,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 159.1ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-24 09:48:00,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-24 09:48:00,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-24 09:48:00,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:48:00,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-24 09:48:00,908 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 19 [2021-10-24 09:48:00,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:48:00,908 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-24 09:48:00,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 09:48:00,909 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-24 09:48:00,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 09:48:00,909 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:48:00,910 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 09:48:00,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-10-24 09:48:01,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:48:01,111 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 09:48:01,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:48:01,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2021-10-24 09:48:01,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:48:01,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1587834273] [2021-10-24 09:48:01,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:48:01,112 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:48:01,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:48:01,113 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:48:01,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-24 09:48:01,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 09:48:01,384 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-24 09:48:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 09:48:01,576 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-24 09:48:01,576 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-24 09:48:01,577 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 09:48:01,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-10-24 09:48:01,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:48:01,797 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 09:48:01,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 09:48:01 BoogieIcfgContainer [2021-10-24 09:48:01,839 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 09:48:01,839 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 09:48:01,840 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 09:48:01,840 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 09:48:01,841 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:47:55" (3/4) ... [2021-10-24 09:48:01,843 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-24 09:48:01,926 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 09:48:01,926 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 09:48:01,928 INFO L168 Benchmark]: Toolchain (without parser) took 8035.45 ms. Allocated memory was 52.4 MB in the beginning and 77.6 MB in the end (delta: 25.2 MB). Free memory was 29.3 MB in the beginning and 33.7 MB in the end (delta: -4.4 MB). Peak memory consumption was 20.5 MB. Max. memory is 16.1 GB. [2021-10-24 09:48:01,929 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 52.4 MB. Free memory was 32.9 MB in the beginning and 32.9 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 09:48:01,930 INFO L168 Benchmark]: CACSL2BoogieTranslator took 343.70 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 29.1 MB in the beginning and 46.8 MB in the end (delta: -17.8 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.1 GB. [2021-10-24 09:48:01,930 INFO L168 Benchmark]: Boogie Procedure Inliner took 94.67 ms. Allocated memory is still 62.9 MB. Free memory was 46.6 MB in the beginning and 44.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 09:48:01,931 INFO L168 Benchmark]: Boogie Preprocessor took 80.54 ms. Allocated memory is still 62.9 MB. Free memory was 44.9 MB in the beginning and 43.2 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 09:48:01,932 INFO L168 Benchmark]: RCFGBuilder took 690.55 ms. Allocated memory is still 62.9 MB. Free memory was 43.2 MB in the beginning and 42.4 MB in the end (delta: 816.9 kB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB. [2021-10-24 09:48:01,932 INFO L168 Benchmark]: TraceAbstraction took 6728.95 ms. Allocated memory was 62.9 MB in the beginning and 77.6 MB in the end (delta: 14.7 MB). Free memory was 41.9 MB in the beginning and 36.4 MB in the end (delta: 5.5 MB). Peak memory consumption was 22.8 MB. Max. memory is 16.1 GB. [2021-10-24 09:48:01,933 INFO L168 Benchmark]: Witness Printer took 86.78 ms. Allocated memory is still 77.6 MB. Free memory was 36.4 MB in the beginning and 33.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 09:48:01,937 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 52.4 MB. Free memory was 32.9 MB in the beginning and 32.9 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 343.70 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 29.1 MB in the beginning and 46.8 MB in the end (delta: -17.8 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 94.67 ms. Allocated memory is still 62.9 MB. Free memory was 46.6 MB in the beginning and 44.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 80.54 ms. Allocated memory is still 62.9 MB. Free memory was 44.9 MB in the beginning and 43.2 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 690.55 ms. Allocated memory is still 62.9 MB. Free memory was 43.2 MB in the beginning and 42.4 MB in the end (delta: 816.9 kB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6728.95 ms. Allocated memory was 62.9 MB in the beginning and 77.6 MB in the end (delta: 14.7 MB). Free memory was 41.9 MB in the beginning and 36.4 MB in the end (delta: 5.5 MB). Peak memory consumption was 22.8 MB. Max. memory is 16.1 GB. * Witness Printer took 86.78 ms. Allocated memory is still 77.6 MB. Free memory was 36.4 MB in the beginning and 33.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 87]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L81] double x = 0.0; [L82] double y = -0.0; [L26] __uint32_t msw, lsw; [L29] ieee_double_shape_type ew_u; [L30] ew_u.value = (x) [L31] EXPR ew_u.parts.msw [L31] (msw) = ew_u.parts.msw [L32] EXPR ew_u.parts.lsw [L32] (lsw) = ew_u.parts.lsw [L35-L36] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L37] return 2; [L54] COND FALSE !(__fpclassify_double(x) == 0) [L26] __uint32_t msw, lsw; [L29] ieee_double_shape_type ew_u; [L30] ew_u.value = (x) [L31] EXPR ew_u.parts.msw [L31] (msw) = ew_u.parts.msw [L32] EXPR ew_u.parts.lsw [L32] (lsw) = ew_u.parts.lsw [L35-L36] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L37] return 2; [L56] COND FALSE !(__fpclassify_double(y) == 0) [L59] EXPR x > y ? x : y [L59] return x > y ? x : y; [L83] double res = fmax_double(x, y); [L86] EXPR res == 0.0 && __signbit_double(res) == 0 [L63] __uint32_t msw; [L66] ieee_double_shape_type gh_u; [L67] gh_u.value = (x) [L68] EXPR gh_u.parts.msw [L68] (msw) = gh_u.parts.msw [L71] return (msw & 0x80000000) != 0; [L86] EXPR res == 0.0 && __signbit_double(res) == 0 [L86] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L87] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6615.6ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 17.8ms, AutomataDifference: 826.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 234 SDtfs, 249 SDslu, 387 SDs, 0 SdLazy, 128 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 381.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 540.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 78.5ms AutomataMinimizationTime, 7 MinimizatonAttempts, 61 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 143.0ms SsaConstructionTime, 530.0ms SatisfiabilityAnalysisTime, 2368.6ms InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 198 ConstructedInterpolants, 15 QuantifiedInterpolants, 696 SizeOfPredicates, 27 NumberOfNonLiveVariables, 423 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-24 09:48:01,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94293158-f712-4c9f-aac6-f96aaec49e95/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...