./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/double_req_bl_1230.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1230.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta --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 7a8b477e0de82621230934ea5797a52ab61045346694bc3bac8acbd53f389ba3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:22:10,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:22:10,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:22:10,042 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:22:10,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:22:10,047 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:22:10,049 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:22:10,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:22:10,058 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:22:10,066 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:22:10,068 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:22:10,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:22:10,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:22:10,074 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:22:10,077 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:22:10,079 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:22:10,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:22:10,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:22:10,085 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:22:10,093 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:22:10,095 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:22:10,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:22:10,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:22:10,101 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:22:10,112 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:22:10,113 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:22:10,113 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:22:10,115 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:22:10,116 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:22:10,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:22:10,119 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:22:10,120 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:22:10,122 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:22:10,124 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:22:10,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:22:10,127 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:22:10,127 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:22:10,128 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:22:10,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:22:10,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:22:10,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:22:10,132 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:22:10,182 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:22:10,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:22:10,183 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:22:10,183 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:22:10,184 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:22:10,185 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:22:10,185 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:22:10,185 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:22:10,186 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:22:10,186 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:22:10,186 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:22:10,186 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:22:10,187 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:22:10,187 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:22:10,187 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:22:10,188 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:22:10,188 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:22:10,188 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:22:10,189 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:22:10,189 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:22:10,190 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:22:10,190 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:22:10,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:22:10,190 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:22:10,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:22:10,191 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:22:10,191 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:22:10,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:22:10,192 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:22:10,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:22:10,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:22:10,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:22:10,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:22:10,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:22:10,194 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:22:10,194 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:22:10,194 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:22:10,194 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:22:10,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:22:10,195 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:22:10,195 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:22:10,195 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a8b477e0de82621230934ea5797a52ab61045346694bc3bac8acbd53f389ba3 [2022-10-17 17:22:10,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:22:10,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:22:10,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:22:10,490 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:22:10,491 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:22:10,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/float-newlib/double_req_bl_1230.c [2022-10-17 17:22:10,574 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/data/e9f0598c9/50349ccafe5d4d69ba8b76989ca3744f/FLAG7e587b5fe [2022-10-17 17:22:11,049 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:22:11,049 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/sv-benchmarks/c/float-newlib/double_req_bl_1230.c [2022-10-17 17:22:11,057 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/data/e9f0598c9/50349ccafe5d4d69ba8b76989ca3744f/FLAG7e587b5fe [2022-10-17 17:22:11,534 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/data/e9f0598c9/50349ccafe5d4d69ba8b76989ca3744f [2022-10-17 17:22:11,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:22:11,538 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:22:11,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:22:11,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:22:11,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:22:11,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:22:11" (1/1) ... [2022-10-17 17:22:11,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@306b6e40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:11, skipping insertion in model container [2022-10-17 17:22:11,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:22:11" (1/1) ... [2022-10-17 17:22:11,554 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:22:11,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:22:11,790 WARN L230 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_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/sv-benchmarks/c/float-newlib/double_req_bl_1230.c[1667,1680] [2022-10-17 17:22:11,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:22:11,803 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:22:11,827 WARN L230 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_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/sv-benchmarks/c/float-newlib/double_req_bl_1230.c[1667,1680] [2022-10-17 17:22:11,828 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:22:11,842 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:22:11,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:11 WrapperNode [2022-10-17 17:22:11,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:22:11,844 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:22:11,845 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:22:11,845 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:22:11,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:11" (1/1) ... [2022-10-17 17:22:11,861 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:11" (1/1) ... [2022-10-17 17:22:11,881 INFO L138 Inliner]: procedures = 18, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 50 [2022-10-17 17:22:11,881 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:22:11,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:22:11,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:22:11,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:22:11,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:11" (1/1) ... [2022-10-17 17:22:11,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:11" (1/1) ... [2022-10-17 17:22:11,895 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:11" (1/1) ... [2022-10-17 17:22:11,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:11" (1/1) ... [2022-10-17 17:22:11,902 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:11" (1/1) ... [2022-10-17 17:22:11,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:11" (1/1) ... [2022-10-17 17:22:11,913 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:11" (1/1) ... [2022-10-17 17:22:11,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:11" (1/1) ... [2022-10-17 17:22:11,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:22:11,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:22:11,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:22:11,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:22:11,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:11" (1/1) ... [2022-10-17 17:22:11,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:22:11,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:22:11,969 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:22:11,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:22:12,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:22:12,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:22:12,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:22:12,014 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_double [2022-10-17 17:22:12,015 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_double [2022-10-17 17:22:12,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2022-10-17 17:22:12,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:22:12,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:22:12,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:22:12,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:22:12,112 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:22:12,114 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:22:12,290 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:22:12,385 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:22:12,391 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 17:22:12,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:22:12 BoogieIcfgContainer [2022-10-17 17:22:12,394 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:22:12,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:22:12,397 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:22:12,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:22:12,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:22:11" (1/3) ... [2022-10-17 17:22:12,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37319140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:22:12, skipping insertion in model container [2022-10-17 17:22:12,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:11" (2/3) ... [2022-10-17 17:22:12,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37319140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:22:12, skipping insertion in model container [2022-10-17 17:22:12,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:22:12" (3/3) ... [2022-10-17 17:22:12,412 INFO L112 eAbstractionObserver]: Analyzing ICFG double_req_bl_1230.c [2022-10-17 17:22:12,433 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:22:12,433 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:22:12,502 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:22:12,511 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@55a1df18, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:22:12,511 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:22:12,516 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:22:12,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 17:22:12,526 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:12,527 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:12,528 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:12,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:12,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1225073873, now seen corresponding path program 1 times [2022-10-17 17:22:12,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:12,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319889595] [2022-10-17 17:22:12,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:12,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:12,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:12,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:12,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319889595] [2022-10-17 17:22:12,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319889595] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:12,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:12,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:22:12,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348038872] [2022-10-17 17:22:12,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:12,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 17:22:12,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:12,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 17:22:12,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:22:12,844 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:22:12,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:12,880 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-10-17 17:22:12,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 17:22:12,893 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-10-17 17:22:12,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:12,908 INFO L225 Difference]: With dead ends: 32 [2022-10-17 17:22:12,909 INFO L226 Difference]: Without dead ends: 15 [2022-10-17 17:22:12,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:22:12,916 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:12,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:22:12,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-10-17 17:22:12,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-10-17 17:22:12,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:22:12,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-10-17 17:22:12,974 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-10-17 17:22:12,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:12,975 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-10-17 17:22:12,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:22:12,976 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-10-17 17:22:12,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-17 17:22:12,978 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:12,978 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:12,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:22:12,979 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:12,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:12,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1359783568, now seen corresponding path program 1 times [2022-10-17 17:22:12,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:12,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631591799] [2022-10-17 17:22:12,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:12,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:22:13,087 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 17:22:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:22:13,168 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-10-17 17:22:13,169 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 17:22:13,171 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-10-17 17:22:13,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:22:13,177 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-17 17:22:13,181 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-10-17 17:22:13,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.10 05:22:13 BoogieIcfgContainer [2022-10-17 17:22:13,205 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-10-17 17:22:13,206 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-10-17 17:22:13,206 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-10-17 17:22:13,207 INFO L275 PluginConnector]: Witness Printer initialized [2022-10-17 17:22:13,207 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:22:12" (3/4) ... [2022-10-17 17:22:13,210 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-10-17 17:22:13,211 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-10-17 17:22:13,212 INFO L158 Benchmark]: Toolchain (without parser) took 1673.24ms. Allocated memory was 117.4MB in the beginning and 151.0MB in the end (delta: 33.6MB). Free memory was 83.7MB in the beginning and 115.0MB in the end (delta: -31.3MB). Peak memory consumption was 2.0MB. Max. memory is 16.1GB. [2022-10-17 17:22:13,213 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 117.4MB. Free memory is still 67.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 17:22:13,213 INFO L158 Benchmark]: CACSL2BoogieTranslator took 303.24ms. Allocated memory is still 117.4MB. Free memory was 83.5MB in the beginning and 89.8MB in the end (delta: -6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-10-17 17:22:13,214 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.57ms. Allocated memory is still 117.4MB. Free memory was 89.8MB in the beginning and 88.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-10-17 17:22:13,215 INFO L158 Benchmark]: Boogie Preprocessor took 49.57ms. Allocated memory is still 117.4MB. Free memory was 88.5MB in the beginning and 86.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-10-17 17:22:13,216 INFO L158 Benchmark]: RCFGBuilder took 461.64ms. Allocated memory is still 117.4MB. Free memory was 86.9MB in the beginning and 69.7MB in the end (delta: 17.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-10-17 17:22:13,217 INFO L158 Benchmark]: TraceAbstraction took 808.80ms. Allocated memory was 117.4MB in the beginning and 151.0MB in the end (delta: 33.6MB). Free memory was 69.2MB in the beginning and 115.0MB in the end (delta: -45.8MB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 17:22:13,217 INFO L158 Benchmark]: Witness Printer took 5.03ms. Allocated memory is still 151.0MB. Free memory is still 115.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 17:22:13,221 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 117.4MB. Free memory is still 67.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 303.24ms. Allocated memory is still 117.4MB. Free memory was 83.5MB in the beginning and 89.8MB in the end (delta: -6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.57ms. Allocated memory is still 117.4MB. Free memory was 89.8MB in the beginning and 88.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.57ms. Allocated memory is still 117.4MB. Free memory was 88.5MB in the beginning and 86.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 461.64ms. Allocated memory is still 117.4MB. Free memory was 86.9MB in the beginning and 69.7MB in the end (delta: 17.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 808.80ms. Allocated memory was 117.4MB in the beginning and 151.0MB in the end (delta: 33.6MB). Free memory was 69.2MB in the beginning and 115.0MB in the end (delta: -45.8MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 5.03ms. Allocated memory is still 151.0MB. Free memory is still 115.0MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 68]: 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 18, overapproximation of someBinaryArithmeticDOUBLEoperation at line 63. Possible FailurePath: [L63] double x = 0.0 / 0.0; [L64] double y = 0.0 / 0.0; [L65] CALL, EXPR fmin_double(x, y) [L47] CALL, EXPR __fpclassify_double(x) VAL [\old(x)=2146435081] [L20] __uint32_t msw, lsw; VAL [\old(x)=2146435081, x=2146435081] [L23] ieee_double_shape_type ew_u; [L24] ew_u.value = (x) [L25] EXPR ew_u.parts.msw [L25] (msw) = ew_u.parts.msw [L26] EXPR ew_u.parts.lsw [L26] (lsw) = ew_u.parts.lsw [L29-L30] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L32-L33] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L35-L36] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L39-L40] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L43] return 0; [L47] RET, EXPR __fpclassify_double(x) VAL [\old(x)=2146435081, \old(y)=2146435080, __fpclassify_double(x)=0, x=2146435081, y=2146435080] [L47] COND TRUE __fpclassify_double(x) == 0 [L48] return y; VAL [\old(x)=2146435081, \old(y)=2146435080, \result=2146435080, x=2146435081, y=2146435080] [L65] RET, EXPR fmin_double(x, y) [L65] double res = fmin_double(x, y); [L67] CALL, EXPR isnan_double(res) [L18] return x != x; [L67] RET, EXPR isnan_double(res) [L67] COND TRUE !isnan_double(res) [L68] reach_error() VAL [res=2146435080, x=2146435081, y=2146435080] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 13 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5 IncrementalHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 13 mSDtfsCounter, 5 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 10 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 [2022-10-17 17:22:13,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1230.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta --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 7a8b477e0de82621230934ea5797a52ab61045346694bc3bac8acbd53f389ba3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:22:15,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:22:15,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:22:15,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:22:15,874 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:22:15,875 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:22:15,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:22:15,880 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:22:15,882 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:22:15,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:22:15,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:22:15,886 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:22:15,887 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:22:15,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:22:15,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:22:15,895 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:22:15,898 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:22:15,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:22:15,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:22:15,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:22:15,922 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:22:15,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:22:15,929 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:22:15,930 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:22:15,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:22:15,946 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:22:15,946 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:22:15,948 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:22:15,948 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:22:15,949 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:22:15,951 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:22:15,952 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:22:15,953 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:22:15,955 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:22:15,956 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:22:15,957 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:22:15,958 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:22:15,958 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:22:15,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:22:15,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:22:15,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:22:15,963 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-10-17 17:22:15,990 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:22:15,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:22:15,991 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:22:15,991 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:22:15,992 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:22:15,992 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:22:15,993 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:22:15,993 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:22:15,993 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:22:15,993 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:22:15,993 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:22:15,994 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:22:15,995 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:22:15,995 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:22:15,995 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:22:15,995 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:22:15,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:22:15,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:22:15,996 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:22:15,996 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-17 17:22:15,996 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-10-17 17:22:15,997 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-10-17 17:22:15,997 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:22:15,997 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:22:15,997 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:22:15,998 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:22:15,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:22:15,998 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 17:22:15,998 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:22:15,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:22:15,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:22:15,999 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:22:15,999 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:22:16,000 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-10-17 17:22:16,000 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-10-17 17:22:16,000 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:22:16,000 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:22:16,001 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-10-17 17:22:16,001 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_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a8b477e0de82621230934ea5797a52ab61045346694bc3bac8acbd53f389ba3 [2022-10-17 17:22:16,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:22:16,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:22:16,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:22:16,483 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:22:16,484 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:22:16,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/float-newlib/double_req_bl_1230.c [2022-10-17 17:22:16,561 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/data/a5e4bec94/657b68e8bc504672a5c8a88fc4fb0982/FLAG302b3fdb1 [2022-10-17 17:22:17,054 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:22:17,055 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/sv-benchmarks/c/float-newlib/double_req_bl_1230.c [2022-10-17 17:22:17,061 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/data/a5e4bec94/657b68e8bc504672a5c8a88fc4fb0982/FLAG302b3fdb1 [2022-10-17 17:22:17,541 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/data/a5e4bec94/657b68e8bc504672a5c8a88fc4fb0982 [2022-10-17 17:22:17,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:22:17,546 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:22:17,548 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:22:17,548 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:22:17,565 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:22:17,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:22:17" (1/1) ... [2022-10-17 17:22:17,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f4bc14b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:17, skipping insertion in model container [2022-10-17 17:22:17,567 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:22:17" (1/1) ... [2022-10-17 17:22:17,577 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:22:17,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:22:17,775 WARN L230 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_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/sv-benchmarks/c/float-newlib/double_req_bl_1230.c[1667,1680] [2022-10-17 17:22:17,792 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:22:17,823 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:22:17,856 WARN L230 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_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/sv-benchmarks/c/float-newlib/double_req_bl_1230.c[1667,1680] [2022-10-17 17:22:17,861 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:22:17,886 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:22:17,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:17 WrapperNode [2022-10-17 17:22:17,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:22:17,889 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:22:17,889 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:22:17,889 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:22:17,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:17" (1/1) ... [2022-10-17 17:22:17,919 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:17" (1/1) ... [2022-10-17 17:22:17,943 INFO L138 Inliner]: procedures = 21, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 48 [2022-10-17 17:22:17,944 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:22:17,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:22:17,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:22:17,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:22:17,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:17" (1/1) ... [2022-10-17 17:22:17,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:17" (1/1) ... [2022-10-17 17:22:17,969 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:17" (1/1) ... [2022-10-17 17:22:17,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:17" (1/1) ... [2022-10-17 17:22:17,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:17" (1/1) ... [2022-10-17 17:22:17,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:17" (1/1) ... [2022-10-17 17:22:18,001 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:17" (1/1) ... [2022-10-17 17:22:18,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:17" (1/1) ... [2022-10-17 17:22:18,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:22:18,018 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:22:18,018 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:22:18,018 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:22:18,019 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:17" (1/1) ... [2022-10-17 17:22:18,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:22:18,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:22:18,048 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:22:18,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:22:18,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:22:18,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2022-10-17 17:22:18,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-10-17 17:22:18,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:22:18,109 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_double [2022-10-17 17:22:18,109 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_double [2022-10-17 17:22:18,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-10-17 17:22:18,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:22:18,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:22:18,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:22:18,223 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:22:18,226 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:22:18,529 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:22:18,534 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:22:18,535 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 17:22:18,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:22:18 BoogieIcfgContainer [2022-10-17 17:22:18,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:22:18,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:22:18,552 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:22:18,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:22:18,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:22:17" (1/3) ... [2022-10-17 17:22:18,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5477285f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:22:18, skipping insertion in model container [2022-10-17 17:22:18,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:17" (2/3) ... [2022-10-17 17:22:18,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5477285f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:22:18, skipping insertion in model container [2022-10-17 17:22:18,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:22:18" (3/3) ... [2022-10-17 17:22:18,559 INFO L112 eAbstractionObserver]: Analyzing ICFG double_req_bl_1230.c [2022-10-17 17:22:18,585 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:22:18,585 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:22:18,670 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:22:18,682 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@533e3841, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:22:18,683 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:22:18,687 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:22:18,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-17 17:22:18,697 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:18,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:18,699 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:18,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:18,706 INFO L85 PathProgramCache]: Analyzing trace with hash 369317884, now seen corresponding path program 1 times [2022-10-17 17:22:18,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:22:18,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1377975218] [2022-10-17 17:22:18,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:18,720 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:22:18,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:22:18,724 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:22:18,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-10-17 17:22:18,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:18,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2022-10-17 17:22:18,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:18,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:18,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:22:18,894 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:22:18,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1377975218] [2022-10-17 17:22:18,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1377975218] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:18,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:18,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:22:18,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968720750] [2022-10-17 17:22:18,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:18,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 17:22:18,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:22:18,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 17:22:18,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:22:18,943 INFO L87 Difference]: Start difference. First operand has 25 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:22:18,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:18,964 INFO L93 Difference]: Finished difference Result 47 states and 68 transitions. [2022-10-17 17:22:18,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 17:22:18,967 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-10-17 17:22:18,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:18,974 INFO L225 Difference]: With dead ends: 47 [2022-10-17 17:22:18,974 INFO L226 Difference]: Without dead ends: 22 [2022-10-17 17:22:18,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:22:18,985 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:18,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:22:19,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-10-17 17:22:19,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-10-17 17:22:19,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:22:19,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2022-10-17 17:22:19,036 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 13 [2022-10-17 17:22:19,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:19,036 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2022-10-17 17:22:19,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:22:19,037 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2022-10-17 17:22:19,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-17 17:22:19,039 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:19,039 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:19,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-10-17 17:22:19,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:22:19,251 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:19,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:19,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1711341929, now seen corresponding path program 1 times [2022-10-17 17:22:19,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:22:19,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [178408901] [2022-10-17 17:22:19,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:19,253 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:22:19,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:22:19,256 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:22:19,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-10-17 17:22:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:19,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:22:19,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:19,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:22:19,414 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:22:19,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [178408901] [2022-10-17 17:22:19,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [178408901] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:19,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:19,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:22:19,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43806497] [2022-10-17 17:22:19,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:19,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:22:19,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:22:19,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:22:19,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:22:19,418 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:22:19,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:19,465 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2022-10-17 17:22:19,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:22:19,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-10-17 17:22:19,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:19,468 INFO L225 Difference]: With dead ends: 30 [2022-10-17 17:22:19,468 INFO L226 Difference]: Without dead ends: 25 [2022-10-17 17:22:19,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:22:19,470 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:19,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:22:19,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-10-17 17:22:19,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-10-17 17:22:19,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 17:22:19,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2022-10-17 17:22:19,479 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 14 [2022-10-17 17:22:19,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:19,480 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2022-10-17 17:22:19,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:22:19,480 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2022-10-17 17:22:19,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-17 17:22:19,481 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:19,481 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:19,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:22:19,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:22:19,699 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:19,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:19,699 INFO L85 PathProgramCache]: Analyzing trace with hash -2061340999, now seen corresponding path program 1 times [2022-10-17 17:22:19,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:22:19,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [372476321] [2022-10-17 17:22:19,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:19,701 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:22:19,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:22:19,711 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:22:19,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-10-17 17:22:19,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:19,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:22:19,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:19,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:19,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:22:19,854 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:22:19,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [372476321] [2022-10-17 17:22:19,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [372476321] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:19,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:19,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:22:19,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545864781] [2022-10-17 17:22:19,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:19,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:22:19,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:22:19,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:22:19,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:22:19,857 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:22:20,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:20,123 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2022-10-17 17:22:20,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:22:20,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-10-17 17:22:20,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:20,125 INFO L225 Difference]: With dead ends: 33 [2022-10-17 17:22:20,125 INFO L226 Difference]: Without dead ends: 28 [2022-10-17 17:22:20,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:22:20,127 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:20,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 17:22:20,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-10-17 17:22:20,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2022-10-17 17:22:20,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 17:22:20,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2022-10-17 17:22:20,135 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 15 [2022-10-17 17:22:20,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:20,136 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2022-10-17 17:22:20,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:22:20,136 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2022-10-17 17:22:20,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-17 17:22:20,137 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:20,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:20,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-10-17 17:22:20,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:22:20,350 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:20,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:20,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1645103533, now seen corresponding path program 1 times [2022-10-17 17:22:20,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:22:20,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1396086762] [2022-10-17 17:22:20,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:20,352 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:22:20,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:22:20,353 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:22:20,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-10-17 17:22:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:20,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:22:20,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:20,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:22:20,477 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:22:20,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1396086762] [2022-10-17 17:22:20,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1396086762] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:20,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:20,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:22:20,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598149948] [2022-10-17 17:22:20,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:20,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:22:20,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:22:20,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:22:20,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:22:20,480 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:22:20,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:20,566 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2022-10-17 17:22:20,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:22:20,568 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-10-17 17:22:20,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:20,570 INFO L225 Difference]: With dead ends: 33 [2022-10-17 17:22:20,570 INFO L226 Difference]: Without dead ends: 28 [2022-10-17 17:22:20,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:22:20,572 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:20,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:22:20,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-10-17 17:22:20,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2022-10-17 17:22:20,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 17:22:20,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2022-10-17 17:22:20,580 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 16 [2022-10-17 17:22:20,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:20,580 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2022-10-17 17:22:20,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:22:20,586 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2022-10-17 17:22:20,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-17 17:22:20,595 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:20,595 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:20,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-10-17 17:22:20,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:22:20,796 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:20,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:20,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1049630069, now seen corresponding path program 1 times [2022-10-17 17:22:20,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:22:20,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46656199] [2022-10-17 17:22:20,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:20,802 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:22:20,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:22:20,807 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:22:20,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-10-17 17:22:20,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:20,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:22:20,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:20,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:22:20,915 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:22:20,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46656199] [2022-10-17 17:22:20,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46656199] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:20,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:20,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:22:20,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78067970] [2022-10-17 17:22:20,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:20,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:22:20,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:22:20,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:22:20,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:22:20,918 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:22:20,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:20,961 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2022-10-17 17:22:20,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:22:20,962 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-10-17 17:22:20,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:20,963 INFO L225 Difference]: With dead ends: 33 [2022-10-17 17:22:20,963 INFO L226 Difference]: Without dead ends: 28 [2022-10-17 17:22:20,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:22:20,965 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:20,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:22:20,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-10-17 17:22:20,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2022-10-17 17:22:20,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 17:22:20,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2022-10-17 17:22:20,972 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 17 [2022-10-17 17:22:20,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:20,973 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2022-10-17 17:22:20,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:22:20,973 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2022-10-17 17:22:20,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-17 17:22:20,974 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:20,974 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:20,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-10-17 17:22:21,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:22:21,190 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:21,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:21,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1502526892, now seen corresponding path program 1 times [2022-10-17 17:22:21,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:22:21,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1609711625] [2022-10-17 17:22:21,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:21,191 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:22:21,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:22:21,192 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:22:21,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-10-17 17:22:21,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:21,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-17 17:22:21,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:21,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:21,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:22:21,518 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:22:21,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1609711625] [2022-10-17 17:22:21,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1609711625] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:21,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:21,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:22:21,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953830689] [2022-10-17 17:22:21,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:21,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:22:21,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:22:21,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:22:21,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:22:21,520 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:22:21,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:21,594 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-10-17 17:22:21,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:22:21,594 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-10-17 17:22:21,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:21,595 INFO L225 Difference]: With dead ends: 35 [2022-10-17 17:22:21,595 INFO L226 Difference]: Without dead ends: 30 [2022-10-17 17:22:21,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:22:21,597 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:21,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 109 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 18 Unchecked, 0.0s Time] [2022-10-17 17:22:21,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-10-17 17:22:21,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2022-10-17 17:22:21,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:22:21,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-10-17 17:22:21,612 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 17 [2022-10-17 17:22:21,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:21,613 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-10-17 17:22:21,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:22:21,613 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-10-17 17:22:21,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-17 17:22:21,614 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:21,614 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:21,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-10-17 17:22:21,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:22:21,815 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:21,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:21,815 INFO L85 PathProgramCache]: Analyzing trace with hash -451389748, now seen corresponding path program 1 times [2022-10-17 17:22:21,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:22:21,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [124068374] [2022-10-17 17:22:21,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:21,816 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:22:21,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:22:21,816 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:22:21,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-10-17 17:22:21,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:21,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:22:21,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:21,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:22:21,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:22:21,966 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:22:21,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [124068374] [2022-10-17 17:22:21,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [124068374] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:21,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:21,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:22:21,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146750125] [2022-10-17 17:22:21,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:21,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:22:21,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:22:21,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:22:21,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:22:21,969 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:22:22,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:22,127 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2022-10-17 17:22:22,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:22:22,128 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-10-17 17:22:22,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:22,128 INFO L225 Difference]: With dead ends: 30 [2022-10-17 17:22:22,129 INFO L226 Difference]: Without dead ends: 25 [2022-10-17 17:22:22,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:22:22,130 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:22,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:22:22,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-10-17 17:22:22,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-10-17 17:22:22,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 17:22:22,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-10-17 17:22:22,138 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 22 [2022-10-17 17:22:22,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:22,138 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-10-17 17:22:22,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:22:22,139 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-10-17 17:22:22,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-17 17:22:22,140 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:22,140 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:22,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-10-17 17:22:22,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:22:22,351 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:22,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:22,351 INFO L85 PathProgramCache]: Analyzing trace with hash 753455404, now seen corresponding path program 1 times [2022-10-17 17:22:22,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:22:22,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [338140796] [2022-10-17 17:22:22,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:22,352 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:22:22,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:22:22,353 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:22:22,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-10-17 17:22:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:22,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:22:22,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:22,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:22:22,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:22:22,505 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:22:22,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [338140796] [2022-10-17 17:22:22,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [338140796] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:22,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:22,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:22:22,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757239322] [2022-10-17 17:22:22,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:22,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:22:22,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:22:22,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:22:22,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:22:22,508 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:22:22,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:22,556 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-10-17 17:22:22,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:22:22,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-10-17 17:22:22,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:22,557 INFO L225 Difference]: With dead ends: 33 [2022-10-17 17:22:22,558 INFO L226 Difference]: Without dead ends: 28 [2022-10-17 17:22:22,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:22:22,559 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:22,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:22:22,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-10-17 17:22:22,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2022-10-17 17:22:22,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 17:22:22,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-10-17 17:22:22,565 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 23 [2022-10-17 17:22:22,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:22,566 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-10-17 17:22:22,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:22:22,566 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-10-17 17:22:22,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-17 17:22:22,567 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:22,567 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:22,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-10-17 17:22:22,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:22:22,779 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:22,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:22,779 INFO L85 PathProgramCache]: Analyzing trace with hash 2125223496, now seen corresponding path program 1 times [2022-10-17 17:22:22,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:22:22,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772284399] [2022-10-17 17:22:22,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:22,780 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:22:22,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:22:22,781 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:22:22,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-10-17 17:22:22,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:22,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:22:22,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:22,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:22:22,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:22:22,947 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:22:22,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772284399] [2022-10-17 17:22:22,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772284399] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:22,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:22,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:22:22,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860326055] [2022-10-17 17:22:22,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:22,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:22:22,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:22:22,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:22:22,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:22:22,950 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:22:22,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:22,979 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-10-17 17:22:22,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:22:22,980 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-10-17 17:22:22,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:22,981 INFO L225 Difference]: With dead ends: 33 [2022-10-17 17:22:22,981 INFO L226 Difference]: Without dead ends: 28 [2022-10-17 17:22:22,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:22:22,983 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:22,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:22:22,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-10-17 17:22:22,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2022-10-17 17:22:22,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 17:22:22,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-10-17 17:22:22,989 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 24 [2022-10-17 17:22:22,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:22,989 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-10-17 17:22:22,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:22:22,990 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-10-17 17:22:22,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-17 17:22:22,991 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:22,991 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:23,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-10-17 17:22:23,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:22:23,205 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:23,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:23,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1662794800, now seen corresponding path program 1 times [2022-10-17 17:22:23,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:22:23,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786106845] [2022-10-17 17:22:23,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:23,208 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:22:23,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:22:23,215 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:22:23,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-10-17 17:22:23,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:23,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-17 17:22:23,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 17:22:23,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:22:23,556 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:22:23,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786106845] [2022-10-17 17:22:23,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [786106845] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:23,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:23,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 17:22:23,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474766183] [2022-10-17 17:22:23,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:23,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:22:23,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:22:23,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:22:23,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:22:23,558 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:22:23,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:23,591 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2022-10-17 17:22:23,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:22:23,592 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-10-17 17:22:23,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:23,593 INFO L225 Difference]: With dead ends: 32 [2022-10-17 17:22:23,593 INFO L226 Difference]: Without dead ends: 26 [2022-10-17 17:22:23,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:22:23,595 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:23,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 125 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 15 Unchecked, 0.0s Time] [2022-10-17 17:22:23,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-10-17 17:22:23,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-10-17 17:22:23,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 17:22:23,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-10-17 17:22:23,600 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 24 [2022-10-17 17:22:23,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:23,600 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-10-17 17:22:23,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:22:23,601 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-10-17 17:22:23,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-17 17:22:23,602 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:23,602 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:23,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-10-17 17:22:23,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:22:23,820 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:23,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:23,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1605536498, now seen corresponding path program 1 times [2022-10-17 17:22:23,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:22:23,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [305988173] [2022-10-17 17:22:23,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:23,823 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:22:23,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:22:23,824 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:22:23,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-10-17 17:22:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:23,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 17:22:23,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 17:22:24,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:22:24,015 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:22:24,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [305988173] [2022-10-17 17:22:24,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [305988173] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:24,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:24,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:22:24,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123159102] [2022-10-17 17:22:24,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:24,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:22:24,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:22:24,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:22:24,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:22:24,017 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:22:24,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:24,020 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-10-17 17:22:24,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:22:24,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-10-17 17:22:24,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:24,021 INFO L225 Difference]: With dead ends: 30 [2022-10-17 17:22:24,021 INFO L226 Difference]: Without dead ends: 22 [2022-10-17 17:22:24,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:22:24,022 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:24,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 2 Unchecked, 0.0s Time] [2022-10-17 17:22:24,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-10-17 17:22:24,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-10-17 17:22:24,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 17:22:24,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-10-17 17:22:24,027 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 24 [2022-10-17 17:22:24,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:24,027 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-10-17 17:22:24,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:22:24,028 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-10-17 17:22:24,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-17 17:22:24,029 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:24,029 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:24,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-10-17 17:22:24,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:22:24,243 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:24,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:24,244 INFO L85 PathProgramCache]: Analyzing trace with hash 81668136, now seen corresponding path program 1 times [2022-10-17 17:22:24,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:22:24,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1136784846] [2022-10-17 17:22:24,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:24,244 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:22:24,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:22:24,245 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:22:24,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-10-17 17:22:24,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:24,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:22:24,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:22:24,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:22:24,382 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:22:24,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1136784846] [2022-10-17 17:22:24,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1136784846] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:24,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:24,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:22:24,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802047007] [2022-10-17 17:22:24,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:24,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:22:24,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:22:24,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:22:24,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:22:24,387 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:22:24,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:24,433 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-10-17 17:22:24,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:22:24,434 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-10-17 17:22:24,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:24,435 INFO L225 Difference]: With dead ends: 30 [2022-10-17 17:22:24,436 INFO L226 Difference]: Without dead ends: 24 [2022-10-17 17:22:24,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:22:24,437 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:24,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:22:24,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-10-17 17:22:24,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-10-17 17:22:24,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 17:22:24,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-10-17 17:22:24,448 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 25 [2022-10-17 17:22:24,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:24,449 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-10-17 17:22:24,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:22:24,449 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-10-17 17:22:24,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-17 17:22:24,453 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:24,453 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:24,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-10-17 17:22:24,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:22:24,666 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:22:24,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:24,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1824478471, now seen corresponding path program 1 times [2022-10-17 17:22:24,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:22:24,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1172493117] [2022-10-17 17:22:24,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:24,667 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:22:24,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:22:24,668 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:22:24,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-10-17 17:22:24,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:24,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-17 17:22:24,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:22:24,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 17:22:24,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:22:24,922 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:22:24,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1172493117] [2022-10-17 17:22:24,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1172493117] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:24,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:24,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:22:24,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33950954] [2022-10-17 17:22:24,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:24,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:22:24,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:22:24,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:22:24,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:22:24,924 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:22:25,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:25,003 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-10-17 17:22:25,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:22:25,003 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-10-17 17:22:25,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:25,003 INFO L225 Difference]: With dead ends: 22 [2022-10-17 17:22:25,004 INFO L226 Difference]: Without dead ends: 0 [2022-10-17 17:22:25,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:22:25,010 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:25,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 85 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2022-10-17 17:22:25,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-10-17 17:22:25,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-10-17 17:22:25,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:25,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-10-17 17:22:25,012 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2022-10-17 17:22:25,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:25,012 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-10-17 17:22:25,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:22:25,012 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-10-17 17:22:25,012 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-10-17 17:22:25,014 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-10-17 17:22:25,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-10-17 17:22:25,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:22:25,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-10-17 17:22:25,305 INFO L899 garLoopResultBuilder]: For program point __fpclassify_doubleFINAL(lines 19 44) no Hoare annotation was computed. [2022-10-17 17:22:25,306 INFO L902 garLoopResultBuilder]: At program point __fpclassify_doubleENTRY(lines 19 44) the Hoare annotation is: true [2022-10-17 17:22:25,306 INFO L899 garLoopResultBuilder]: For program point L32(lines 32 43) no Hoare annotation was computed. [2022-10-17 17:22:25,306 INFO L899 garLoopResultBuilder]: For program point __fpclassify_doubleEXIT(lines 19 44) no Hoare annotation was computed. [2022-10-17 17:22:25,306 INFO L899 garLoopResultBuilder]: For program point L22-1(lines 22 27) no Hoare annotation was computed. [2022-10-17 17:22:25,306 INFO L902 garLoopResultBuilder]: At program point L22-2(lines 22 27) the Hoare annotation is: true [2022-10-17 17:22:25,306 INFO L899 garLoopResultBuilder]: For program point L22-3(lines 19 44) no Hoare annotation was computed. [2022-10-17 17:22:25,306 INFO L899 garLoopResultBuilder]: For program point L39(lines 39 43) no Hoare annotation was computed. [2022-10-17 17:22:25,306 INFO L899 garLoopResultBuilder]: For program point L35(lines 35 43) no Hoare annotation was computed. [2022-10-17 17:22:25,306 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-10-17 17:22:25,307 INFO L899 garLoopResultBuilder]: For program point L52(line 52) no Hoare annotation was computed. [2022-10-17 17:22:25,307 INFO L899 garLoopResultBuilder]: For program point L52-2(line 52) no Hoare annotation was computed. [2022-10-17 17:22:25,307 INFO L895 garLoopResultBuilder]: At program point L52-3(lines 46 53) the Hoare annotation is: (exists ((currentRoundingMode RoundingMode)) (= |ULTIMATE.start_fmin_double_#res#1| (fp.div currentRoundingMode (_ +zero 11 53) (_ +zero 11 53)))) [2022-10-17 17:22:25,307 INFO L899 garLoopResultBuilder]: For program point L67(lines 67 70) no Hoare annotation was computed. [2022-10-17 17:22:25,307 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-10-17 17:22:25,307 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-10-17 17:22:25,307 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-10-17 17:22:25,307 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 68) no Hoare annotation was computed. [2022-10-17 17:22:25,308 INFO L895 garLoopResultBuilder]: At program point L18(line 18) the Hoare annotation is: (= (_ bv1 32) |ULTIMATE.start_isnan_double_#res#1|) [2022-10-17 17:22:25,308 INFO L895 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (and (exists ((currentRoundingMode RoundingMode)) (= |ULTIMATE.start_fmin_double_~y#1| (fp.div currentRoundingMode (_ +zero 11 53) (_ +zero 11 53)))) (exists ((currentRoundingMode RoundingMode)) (= |ULTIMATE.start_fmin_double_~x#1| (fp.div currentRoundingMode (_ +zero 11 53) (_ +zero 11 53))))) [2022-10-17 17:22:25,308 INFO L899 garLoopResultBuilder]: For program point L49-1(lines 49 50) no Hoare annotation was computed. [2022-10-17 17:22:25,308 INFO L895 garLoopResultBuilder]: At program point L47(line 47) the Hoare annotation is: (and (exists ((currentRoundingMode RoundingMode)) (= |ULTIMATE.start_fmin_double_~y#1| (fp.div currentRoundingMode (_ +zero 11 53) (_ +zero 11 53)))) (exists ((currentRoundingMode RoundingMode)) (= |ULTIMATE.start_fmin_double_~x#1| (fp.div currentRoundingMode (_ +zero 11 53) (_ +zero 11 53))))) [2022-10-17 17:22:25,308 INFO L899 garLoopResultBuilder]: For program point L47-1(lines 47 48) no Hoare annotation was computed. [2022-10-17 17:22:25,308 INFO L902 garLoopResultBuilder]: At program point L72(lines 55 73) the Hoare annotation is: true [2022-10-17 17:22:25,308 INFO L899 garLoopResultBuilder]: For program point L68(line 68) no Hoare annotation was computed. [2022-10-17 17:22:25,312 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:25,314 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-10-17 17:22:25,327 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2022-10-17 17:22:25,328 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2022-10-17 17:22:25,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.10 05:22:25 BoogieIcfgContainer [2022-10-17 17:22:25,329 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-10-17 17:22:25,330 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-10-17 17:22:25,330 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-10-17 17:22:25,330 INFO L275 PluginConnector]: Witness Printer initialized [2022-10-17 17:22:25,331 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:22:18" (3/4) ... [2022-10-17 17:22:25,333 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-10-17 17:22:25,340 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __fpclassify_double [2022-10-17 17:22:25,345 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2022-10-17 17:22:25,345 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2022-10-17 17:22:25,346 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-10-17 17:22:25,346 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-10-17 17:22:25,377 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (\exists currentRoundingMode : FloatRoundingMode :: \result == ~fp.div~DOUBLE(currentRoundingMode, ~Pluszero~LONGDOUBLE(), ~Pluszero~LONGDOUBLE())) [2022-10-17 17:22:25,378 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: 1bv32 == \result [2022-10-17 17:22:25,400 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/witness.graphml [2022-10-17 17:22:25,400 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-10-17 17:22:25,401 INFO L158 Benchmark]: Toolchain (without parser) took 7854.62ms. Allocated memory was 56.6MB in the beginning and 88.1MB in the end (delta: 31.5MB). Free memory was 33.8MB in the beginning and 62.5MB in the end (delta: -28.7MB). Peak memory consumption was 1.6MB. Max. memory is 16.1GB. [2022-10-17 17:22:25,401 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 56.6MB. Free memory was 37.6MB in the beginning and 37.5MB in the end (delta: 42.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 17:22:25,402 INFO L158 Benchmark]: CACSL2BoogieTranslator took 339.59ms. Allocated memory was 56.6MB in the beginning and 73.4MB in the end (delta: 16.8MB). Free memory was 33.6MB in the beginning and 54.9MB in the end (delta: -21.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-10-17 17:22:25,403 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.29ms. Allocated memory is still 73.4MB. Free memory was 54.9MB in the beginning and 53.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-10-17 17:22:25,403 INFO L158 Benchmark]: Boogie Preprocessor took 72.00ms. Allocated memory is still 73.4MB. Free memory was 53.3MB in the beginning and 51.9MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 17:22:25,404 INFO L158 Benchmark]: RCFGBuilder took 532.34ms. Allocated memory is still 73.4MB. Free memory was 51.7MB in the beginning and 56.1MB in the end (delta: -4.4MB). Peak memory consumption was 16.4MB. Max. memory is 16.1GB. [2022-10-17 17:22:25,404 INFO L158 Benchmark]: TraceAbstraction took 6776.98ms. Allocated memory was 73.4MB in the beginning and 88.1MB in the end (delta: 14.7MB). Free memory was 55.5MB in the beginning and 65.3MB in the end (delta: -9.8MB). Peak memory consumption was 5.1MB. Max. memory is 16.1GB. [2022-10-17 17:22:25,405 INFO L158 Benchmark]: Witness Printer took 70.63ms. Allocated memory is still 88.1MB. Free memory was 65.3MB in the beginning and 62.5MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-10-17 17:22:25,411 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 56.6MB. Free memory was 37.6MB in the beginning and 37.5MB in the end (delta: 42.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 339.59ms. Allocated memory was 56.6MB in the beginning and 73.4MB in the end (delta: 16.8MB). Free memory was 33.6MB in the beginning and 54.9MB in the end (delta: -21.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.29ms. Allocated memory is still 73.4MB. Free memory was 54.9MB in the beginning and 53.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 72.00ms. Allocated memory is still 73.4MB. Free memory was 53.3MB in the beginning and 51.9MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 532.34ms. Allocated memory is still 73.4MB. Free memory was 51.7MB in the beginning and 56.1MB in the end (delta: -4.4MB). Peak memory consumption was 16.4MB. Max. memory is 16.1GB. * TraceAbstraction took 6776.98ms. Allocated memory was 73.4MB in the beginning and 88.1MB in the end (delta: 14.7MB). Free memory was 55.5MB in the beginning and 65.3MB in the end (delta: -9.8MB). Peak memory consumption was 5.1MB. Max. memory is 16.1GB. * Witness Printer took 70.63ms. Allocated memory is still 88.1MB. Free memory was 65.3MB in the beginning and 62.5MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 68]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.7s, OverallIterations: 13, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 12 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11 mSDsluCounter, 1022 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 44 IncrementalHoareTripleChecker+Unchecked, 659 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 103 IncrementalHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 363 mSDtfsCounter, 103 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 249 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 56, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 26 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 11 PreInvPairs, 17 NumberOfFragments, 43 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 259 NumberOfCodeBlocks, 259 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 246 ConstructedInterpolants, 20 QuantifiedInterpolants, 426 SizeOfPredicates, 32 NumberOfNonLiveVariables, 965 ConjunctsInSsa, 60 ConjunctsInUnsatCore, 13 InterpolantComputations, 13 PerfectInterpolantSequences, 42/42 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1bv32 == \result - InvariantResult [Line: 46]: Loop Invariant [2022-10-17 17:22:25,434 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2022-10-17 17:22:25,434 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] Derived loop invariant: (\exists currentRoundingMode : FloatRoundingMode :: \result == ~fp.div~DOUBLE(currentRoundingMode, ~Pluszero~LONGDOUBLE(), ~Pluszero~LONGDOUBLE())) - InvariantResult [Line: 55]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-10-17 17:22:25,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f6dd4c2-b8a7-4e8d-bd51-467efe75b4e5/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE