./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba --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 bf0fb52bead8e180875472b49ad053a30663ea61c3025c1e008ec598b0fa4db0 --- 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-b5237d8 [2022-11-22 02:32:27,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:32:27,095 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:32:27,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:32:27,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:32:27,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:32:27,155 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:32:27,159 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:32:27,165 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:32:27,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:32:27,169 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:32:27,172 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:32:27,174 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:32:27,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:32:27,180 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:32:27,182 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:32:27,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:32:27,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:32:27,194 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:32:27,196 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:32:27,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:32:27,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:32:27,207 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:32:27,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:32:27,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:32:27,222 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:32:27,223 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:32:27,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:32:27,226 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:32:27,227 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:32:27,229 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:32:27,230 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:32:27,234 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:32:27,235 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:32:27,236 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:32:27,237 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:32:27,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:32:27,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:32:27,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:32:27,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:32:27,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:32:27,244 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:32:27,295 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:32:27,296 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:32:27,296 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:32:27,297 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:32:27,298 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:32:27,298 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:32:27,298 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:32:27,299 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:32:27,299 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:32:27,299 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:32:27,301 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:32:27,301 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:32:27,301 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:32:27,302 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:32:27,302 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:32:27,302 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:32:27,303 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:32:27,303 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:32:27,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:32:27,304 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:32:27,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:32:27,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:32:27,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:32:27,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:32:27,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:32:27,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:32:27,306 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:32:27,307 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:32:27,307 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:32:27,307 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:32:27,308 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:32:27,308 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:32:27,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:32:27,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:32:27,309 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:32:27,310 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:32:27,310 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:32:27,311 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:32:27,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:32:27,311 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:32:27,312 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:32:27,313 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_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf0fb52bead8e180875472b49ad053a30663ea61c3025c1e008ec598b0fa4db0 [2022-11-22 02:32:27,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:32:27,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:32:27,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:32:27,766 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:32:27,767 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:32:27,769 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c [2022-11-22 02:32:31,563 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:32:31,861 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:32:31,862 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c [2022-11-22 02:32:31,882 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/data/8b63bc6c7/f93ef07678974c409372ecdbb0ee2d16/FLAGefb34d431 [2022-11-22 02:32:31,902 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/data/8b63bc6c7/f93ef07678974c409372ecdbb0ee2d16 [2022-11-22 02:32:31,905 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:32:31,907 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:32:31,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:32:31,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:32:31,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:32:31,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:32:31" (1/1) ... [2022-11-22 02:32:31,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51e8bf73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:31, skipping insertion in model container [2022-11-22 02:32:31,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:32:31" (1/1) ... [2022-11-22 02:32:31,926 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:32:31,955 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:32:32,230 WARN L237 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_8315e5db-b772-4a0d-9623-0b4843fca403/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[1995,2008] [2022-11-22 02:32:32,239 WARN L237 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_8315e5db-b772-4a0d-9623-0b4843fca403/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[2364,2377] [2022-11-22 02:32:32,307 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:32:32,330 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:32:32,368 WARN L237 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_8315e5db-b772-4a0d-9623-0b4843fca403/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[1995,2008] [2022-11-22 02:32:32,370 WARN L237 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_8315e5db-b772-4a0d-9623-0b4843fca403/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[2364,2377] [2022-11-22 02:32:32,426 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:32:32,460 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:32:32,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:32 WrapperNode [2022-11-22 02:32:32,461 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:32:32,464 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:32:32,464 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:32:32,464 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:32:32,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:32" (1/1) ... [2022-11-22 02:32:32,501 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:32" (1/1) ... [2022-11-22 02:32:32,554 INFO L138 Inliner]: procedures = 27, calls = 17, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 187 [2022-11-22 02:32:32,555 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:32:32,556 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:32:32,556 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:32:32,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:32:32,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:32" (1/1) ... [2022-11-22 02:32:32,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:32" (1/1) ... [2022-11-22 02:32:32,594 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:32" (1/1) ... [2022-11-22 02:32:32,594 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:32" (1/1) ... [2022-11-22 02:32:32,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:32" (1/1) ... [2022-11-22 02:32:32,623 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:32" (1/1) ... [2022-11-22 02:32:32,625 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:32" (1/1) ... [2022-11-22 02:32:32,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:32" (1/1) ... [2022-11-22 02:32:32,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:32:32,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:32:32,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:32:32,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:32:32,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:32" (1/1) ... [2022-11-22 02:32:32,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:32:32,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:32:32,694 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:32:32,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:32:32,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:32:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-11-22 02:32:32,758 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-11-22 02:32:32,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:32:32,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:32:32,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:32:32,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-22 02:32:32,760 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-22 02:32:32,913 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:32:32,916 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:32:33,499 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:32:33,810 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:32:33,811 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-22 02:32:33,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:32:33 BoogieIcfgContainer [2022-11-22 02:32:33,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:32:33,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:32:33,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:32:33,846 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:32:33,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:32:31" (1/3) ... [2022-11-22 02:32:33,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26e8b232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:32:33, skipping insertion in model container [2022-11-22 02:32:33,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:32" (2/3) ... [2022-11-22 02:32:33,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26e8b232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:32:33, skipping insertion in model container [2022-11-22 02:32:33,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:32:33" (3/3) ... [2022-11-22 02:32:33,851 INFO L112 eAbstractionObserver]: Analyzing ICFG square_7+soft_float_3a.c.cil.c [2022-11-22 02:32:33,876 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:32:33,877 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-22 02:32:33,955 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:32:33,966 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;@2ff02876, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:32:33,967 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-22 02:32:33,974 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 38 states have internal predecessors, (55), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-22 02:32:33,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-22 02:32:33,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:32:33,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-22 02:32:33,986 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:32:33,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:32:33,995 INFO L85 PathProgramCache]: Analyzing trace with hash 10071630, now seen corresponding path program 1 times [2022-11-22 02:32:34,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:32:34,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223943332] [2022-11-22 02:32:34,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:32:34,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:32:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-22 02:32:34,161 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-22 02:32:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-22 02:32:34,211 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-22 02:32:34,214 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-22 02:32:34,216 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-11-22 02:32:34,219 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-22 02:32:34,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:32:34,232 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-22 02:32:34,238 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-22 02:32:34,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 02:32:34 BoogieIcfgContainer [2022-11-22 02:32:34,272 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-22 02:32:34,276 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-22 02:32:34,276 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-22 02:32:34,276 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-22 02:32:34,277 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:32:33" (3/4) ... [2022-11-22 02:32:34,284 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-22 02:32:34,285 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-22 02:32:34,286 INFO L158 Benchmark]: Toolchain (without parser) took 2379.06ms. Allocated memory is still 161.5MB. Free memory was 130.2MB in the beginning and 116.2MB in the end (delta: 14.0MB). Peak memory consumption was 15.7MB. Max. memory is 16.1GB. [2022-11-22 02:32:34,287 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 121.6MB. Free memory is still 75.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 02:32:34,288 INFO L158 Benchmark]: CACSL2BoogieTranslator took 553.32ms. Allocated memory is still 161.5MB. Free memory was 129.9MB in the beginning and 115.8MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-22 02:32:34,290 INFO L158 Benchmark]: Boogie Procedure Inliner took 91.04ms. Allocated memory is still 161.5MB. Free memory was 115.8MB in the beginning and 113.4MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 02:32:34,292 INFO L158 Benchmark]: Boogie Preprocessor took 78.95ms. Allocated memory is still 161.5MB. Free memory was 113.4MB in the beginning and 111.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 02:32:34,299 INFO L158 Benchmark]: RCFGBuilder took 1171.40ms. Allocated memory is still 161.5MB. Free memory was 111.6MB in the beginning and 129.5MB in the end (delta: -17.9MB). Peak memory consumption was 52.4MB. Max. memory is 16.1GB. [2022-11-22 02:32:34,301 INFO L158 Benchmark]: TraceAbstraction took 455.19ms. Allocated memory is still 161.5MB. Free memory was 128.8MB in the beginning and 116.2MB in the end (delta: 12.6MB). Peak memory consumption was 13.6MB. Max. memory is 16.1GB. [2022-11-22 02:32:34,301 INFO L158 Benchmark]: Witness Printer took 9.24ms. Allocated memory is still 161.5MB. Free memory was 116.2MB in the beginning and 116.2MB in the end (delta: 2.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 02:32:34,311 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 121.6MB. Free memory is still 75.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 553.32ms. Allocated memory is still 161.5MB. Free memory was 129.9MB in the beginning and 115.8MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 91.04ms. Allocated memory is still 161.5MB. Free memory was 115.8MB in the beginning and 113.4MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 78.95ms. Allocated memory is still 161.5MB. Free memory was 113.4MB in the beginning and 111.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1171.40ms. Allocated memory is still 161.5MB. Free memory was 111.6MB in the beginning and 129.5MB in the end (delta: -17.9MB). Peak memory consumption was 52.4MB. Max. memory is 16.1GB. * TraceAbstraction took 455.19ms. Allocated memory is still 161.5MB. Free memory was 128.8MB in the beginning and 116.2MB in the end (delta: 12.6MB). Peak memory consumption was 13.6MB. Max. memory is 16.1GB. * Witness Printer took 9.24ms. Allocated memory is still 161.5MB. Free memory was 116.2MB in the beginning and 116.2MB in the end (delta: 2.6kB). 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: 48]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L320] COND TRUE __VERIFIER_nondet_int() [L321] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=53, x=53] [L47] COND TRUE !(result >= 0.0f && result < 1.4f) VAL [IN=53, x=53] [L48] reach_error() VAL [IN=53, x=53] - UnprovableResult [Line: 60]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 45 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 [2022-11-22 02:32:34,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/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/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba --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 bf0fb52bead8e180875472b49ad053a30663ea61c3025c1e008ec598b0fa4db0 --- 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-b5237d8 [2022-11-22 02:32:37,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:32:37,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:32:37,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:32:37,438 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:32:37,439 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:32:37,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:32:37,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:32:37,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:32:37,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:32:37,449 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:32:37,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:32:37,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:32:37,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:32:37,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:32:37,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:32:37,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:32:37,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:32:37,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:32:37,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:32:37,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:32:37,468 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:32:37,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:32:37,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:32:37,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:32:37,477 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:32:37,477 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:32:37,479 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:32:37,479 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:32:37,481 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:32:37,481 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:32:37,482 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:32:37,484 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:32:37,485 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:32:37,486 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:32:37,487 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:32:37,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:32:37,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:32:37,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:32:37,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:32:37,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:32:37,509 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-22 02:32:37,542 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:32:37,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:32:37,544 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:32:37,544 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:32:37,545 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:32:37,545 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:32:37,546 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:32:37,546 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:32:37,547 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:32:37,547 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:32:37,547 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:32:37,548 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:32:37,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:32:37,549 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:32:37,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:32:37,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:32:37,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:32:37,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:32:37,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:32:37,551 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 02:32:37,551 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-22 02:32:37,552 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-22 02:32:37,552 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:32:37,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:32:37,553 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:32:37,553 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:32:37,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:32:37,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-22 02:32:37,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:32:37,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:32:37,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:32:37,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:32:37,555 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:32:37,556 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-22 02:32:37,556 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-22 02:32:37,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:32:37,557 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:32:37,557 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-22 02:32:37,557 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_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf0fb52bead8e180875472b49ad053a30663ea61c3025c1e008ec598b0fa4db0 [2022-11-22 02:32:38,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:32:38,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:32:38,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:32:38,064 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:32:38,065 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:32:38,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c [2022-11-22 02:32:42,015 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:32:42,382 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:32:42,392 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c [2022-11-22 02:32:42,415 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/data/31ccb528b/ea90febb07174dac9c4524bc0a33a9b9/FLAGbb9563448 [2022-11-22 02:32:42,447 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/data/31ccb528b/ea90febb07174dac9c4524bc0a33a9b9 [2022-11-22 02:32:42,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:32:42,456 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:32:42,460 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:32:42,461 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:32:42,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:32:42,467 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:32:42" (1/1) ... [2022-11-22 02:32:42,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a45ecb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:42, skipping insertion in model container [2022-11-22 02:32:42,469 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:32:42" (1/1) ... [2022-11-22 02:32:42,479 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:32:42,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:32:42,803 WARN L237 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_8315e5db-b772-4a0d-9623-0b4843fca403/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[1995,2008] [2022-11-22 02:32:42,815 WARN L237 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_8315e5db-b772-4a0d-9623-0b4843fca403/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[2364,2377] [2022-11-22 02:32:42,909 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:32:42,934 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:32:42,954 WARN L237 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_8315e5db-b772-4a0d-9623-0b4843fca403/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[1995,2008] [2022-11-22 02:32:42,956 WARN L237 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_8315e5db-b772-4a0d-9623-0b4843fca403/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[2364,2377] [2022-11-22 02:32:42,983 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:32:43,011 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:32:43,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:43 WrapperNode [2022-11-22 02:32:43,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:32:43,015 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:32:43,015 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:32:43,016 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:32:43,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:43" (1/1) ... [2022-11-22 02:32:43,042 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:43" (1/1) ... [2022-11-22 02:32:43,073 INFO L138 Inliner]: procedures = 28, calls = 17, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 129 [2022-11-22 02:32:43,074 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:32:43,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:32:43,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:32:43,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:32:43,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:43" (1/1) ... [2022-11-22 02:32:43,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:43" (1/1) ... [2022-11-22 02:32:43,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:43" (1/1) ... [2022-11-22 02:32:43,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:43" (1/1) ... [2022-11-22 02:32:43,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:43" (1/1) ... [2022-11-22 02:32:43,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:43" (1/1) ... [2022-11-22 02:32:43,113 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:43" (1/1) ... [2022-11-22 02:32:43,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:43" (1/1) ... [2022-11-22 02:32:43,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:32:43,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:32:43,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:32:43,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:32:43,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:43" (1/1) ... [2022-11-22 02:32:43,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:32:43,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:32:43,174 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:32:43,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:32:43,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:32:43,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-22 02:32:43,228 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-11-22 02:32:43,229 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-11-22 02:32:43,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:32:43,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:32:43,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-22 02:32:43,230 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-22 02:32:43,335 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:32:43,337 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:32:46,133 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:32:46,142 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:32:46,143 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-22 02:32:46,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:32:46 BoogieIcfgContainer [2022-11-22 02:32:46,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:32:46,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:32:46,149 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:32:46,154 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:32:46,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:32:42" (1/3) ... [2022-11-22 02:32:46,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b4dc4e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:32:46, skipping insertion in model container [2022-11-22 02:32:46,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:32:43" (2/3) ... [2022-11-22 02:32:46,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b4dc4e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:32:46, skipping insertion in model container [2022-11-22 02:32:46,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:32:46" (3/3) ... [2022-11-22 02:32:46,158 INFO L112 eAbstractionObserver]: Analyzing ICFG square_7+soft_float_3a.c.cil.c [2022-11-22 02:32:46,185 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:32:46,185 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-22 02:32:46,269 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:32:46,280 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;@19a02769, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:32:46,281 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-22 02:32:46,288 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 50 states have (on average 1.56) internal successors, (78), 53 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-22 02:32:46,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 02:32:46,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:32:46,301 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:32:46,302 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:32:46,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:32:46,311 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2022-11-22 02:32:46,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:32:46,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [577410348] [2022-11-22 02:32:46,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:32:46,331 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:32:46,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:32:46,342 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:32:46,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-22 02:32:47,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:32:47,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-22 02:32:47,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:32:47,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:32:47,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:32:47,356 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:32:47,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [577410348] [2022-11-22 02:32:47,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [577410348] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:32:47,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:32:47,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:32:47,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891872416] [2022-11-22 02:32:47,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:32:47,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-22 02:32:47,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:32:47,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-22 02:32:47,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 02:32:47,408 INFO L87 Difference]: Start difference. First operand has 60 states, 50 states have (on average 1.56) internal successors, (78), 53 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-11-22 02:32:47,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:32:47,447 INFO L93 Difference]: Finished difference Result 115 states and 173 transitions. [2022-11-22 02:32:47,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-22 02:32:47,450 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-22 02:32:47,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:32:47,461 INFO L225 Difference]: With dead ends: 115 [2022-11-22 02:32:47,461 INFO L226 Difference]: Without dead ends: 51 [2022-11-22 02:32:47,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 02:32:47,470 INFO L413 NwaCegarLoop]: 81 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, 81 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 [2022-11-22 02:32:47,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:32:47,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-22 02:32:47,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-22 02:32:47,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 44 states have internal predecessors, (61), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 02:32:47,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2022-11-22 02:32:47,526 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 7 [2022-11-22 02:32:47,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:32:47,527 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2022-11-22 02:32:47,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-11-22 02:32:47,528 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2022-11-22 02:32:47,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 02:32:47,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:32:47,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:32:47,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:32:47,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:32:47,740 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:32:47,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:32:47,741 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2022-11-22 02:32:47,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:32:47,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1097247053] [2022-11-22 02:32:47,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:32:47,742 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:32:47,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:32:47,751 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:32:47,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-22 02:37:14,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:37:15,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 02:37:15,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:37:30,627 WARN L837 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (= (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) |c_ULTIMATE.start_main1_~result~0#1|) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2022-11-22 02:38:04,742 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0))) (.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0))) (.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0))) (.cse4 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0))) (.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (or (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (and (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 7.0 5.0)))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0))) (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (_ +zero 8 24))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0))))) is different from false [2022-11-22 02:38:06,798 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0))) (.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0))) (.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0))) (.cse4 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0))) (.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (or (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (and (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 7.0 5.0)))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0))) (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (_ +zero 8 24))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0))))) is different from true [2022-11-22 02:38:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:38:06,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:38:06,800 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:38:06,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1097247053] [2022-11-22 02:38:06,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1097247053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:38:06,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:38:06,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:38:06,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249792539] [2022-11-22 02:38:06,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:38:06,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:38:06,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:38:06,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:38:06,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2022-11-22 02:38:06,805 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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) [2022-11-22 02:38:09,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-22 02:38:09,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:38:09,679 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2022-11-22 02:38:09,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:38:09,680 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-22 02:38:09,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:38:09,681 INFO L225 Difference]: With dead ends: 51 [2022-11-22 02:38:09,682 INFO L226 Difference]: Without dead ends: 46 [2022-11-22 02:38:09,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=18, Invalid=17, Unknown=3, NotChecked=18, Total=56 [2022-11-22 02:38:09,684 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 65 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:38:09,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 175 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 1 Unknown, 135 Unchecked, 2.6s Time] [2022-11-22 02:38:09,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-22 02:38:09,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-22 02:38:09,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.435897435897436) internal successors, (56), 39 states have internal predecessors, (56), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 02:38:09,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 65 transitions. [2022-11-22 02:38:09,696 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 65 transitions. Word has length 7 [2022-11-22 02:38:09,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:38:09,697 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 65 transitions. [2022-11-22 02:38:09,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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) [2022-11-22 02:38:09,697 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 65 transitions. [2022-11-22 02:38:09,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-22 02:38:09,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:38:09,700 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:38:09,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-22 02:38:09,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:38:09,920 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:38:09,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:38:09,921 INFO L85 PathProgramCache]: Analyzing trace with hash 220430878, now seen corresponding path program 1 times [2022-11-22 02:38:09,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:38:09,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177118614] [2022-11-22 02:38:09,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:09,923 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:38:09,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:38:09,924 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:38:09,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-22 02:38:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:38:10,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:38:10,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:38:10,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:38:10,203 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:38:10,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177118614] [2022-11-22 02:38:10,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1177118614] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:38:10,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:38:10,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:38:10,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966120245] [2022-11-22 02:38:10,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:38:10,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:38:10,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:38:10,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:38:10,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:38:10,208 INFO L87 Difference]: Start difference. First operand 46 states and 65 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 02:38:10,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:38:10,709 INFO L93 Difference]: Finished difference Result 102 states and 148 transitions. [2022-11-22 02:38:10,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:38:10,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2022-11-22 02:38:10,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:38:10,714 INFO L225 Difference]: With dead ends: 102 [2022-11-22 02:38:10,715 INFO L226 Difference]: Without dead ends: 60 [2022-11-22 02:38:10,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:38:10,717 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 16 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:38:10,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 143 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:38:10,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-22 02:38:10,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2022-11-22 02:38:10,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 43 states have internal predecessors, (60), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-22 02:38:10,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 71 transitions. [2022-11-22 02:38:10,734 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 71 transitions. Word has length 42 [2022-11-22 02:38:10,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:38:10,735 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 71 transitions. [2022-11-22 02:38:10,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 02:38:10,735 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 71 transitions. [2022-11-22 02:38:10,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-22 02:38:10,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:38:10,738 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:38:10,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-22 02:38:10,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:38:10,952 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:38:10,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:38:10,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1744233432, now seen corresponding path program 1 times [2022-11-22 02:38:10,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:38:10,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207519130] [2022-11-22 02:38:10,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:10,954 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:38:10,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:38:10,956 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:38:10,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-22 02:38:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:38:11,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:38:11,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:38:11,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:38:11,287 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:38:11,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207519130] [2022-11-22 02:38:11,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [207519130] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:38:11,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:38:11,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:38:11,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532215341] [2022-11-22 02:38:11,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:38:11,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:38:11,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:38:11,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:38:11,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:38:11,290 INFO L87 Difference]: Start difference. First operand 51 states and 71 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 02:38:11,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:38:11,752 INFO L93 Difference]: Finished difference Result 106 states and 151 transitions. [2022-11-22 02:38:11,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:38:11,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2022-11-22 02:38:11,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:38:11,755 INFO L225 Difference]: With dead ends: 106 [2022-11-22 02:38:11,755 INFO L226 Difference]: Without dead ends: 63 [2022-11-22 02:38:11,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:38:11,757 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 10 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:38:11,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 157 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:38:11,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-22 02:38:11,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2022-11-22 02:38:11,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 48 states have internal predecessors, (65), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 02:38:11,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2022-11-22 02:38:11,772 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 45 [2022-11-22 02:38:11,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:38:11,773 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2022-11-22 02:38:11,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 02:38:11,773 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2022-11-22 02:38:11,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-22 02:38:11,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:38:11,776 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:38:11,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-22 02:38:11,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:38:11,992 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:38:11,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:38:11,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1089123319, now seen corresponding path program 1 times [2022-11-22 02:38:11,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:38:11,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3877726] [2022-11-22 02:38:11,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:11,994 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:38:11,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:38:11,995 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:38:12,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-22 02:38:12,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:38:12,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:38:12,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:38:12,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:38:12,321 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:38:12,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [3877726] [2022-11-22 02:38:12,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [3877726] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:38:12,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:38:12,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:38:12,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697647376] [2022-11-22 02:38:12,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:38:12,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:38:12,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:38:12,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:38:12,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:38:12,324 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 02:38:12,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:38:12,859 INFO L93 Difference]: Finished difference Result 115 states and 163 transitions. [2022-11-22 02:38:12,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:38:12,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2022-11-22 02:38:12,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:38:12,863 INFO L225 Difference]: With dead ends: 115 [2022-11-22 02:38:12,863 INFO L226 Difference]: Without dead ends: 67 [2022-11-22 02:38:12,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:38:12,865 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 17 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:38:12,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 150 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:38:12,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-22 02:38:12,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2022-11-22 02:38:12,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.375) internal successors, (66), 49 states have internal predecessors, (66), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 02:38:12,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2022-11-22 02:38:12,891 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 46 [2022-11-22 02:38:12,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:38:12,893 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2022-11-22 02:38:12,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 02:38:12,894 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2022-11-22 02:38:12,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-22 02:38:12,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:38:12,898 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:38:12,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-22 02:38:13,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:38:13,113 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:38:13,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:38:13,114 INFO L85 PathProgramCache]: Analyzing trace with hash 957340839, now seen corresponding path program 1 times [2022-11-22 02:38:13,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:38:13,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895628227] [2022-11-22 02:38:13,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:13,115 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:38:13,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:38:13,116 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:38:13,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-22 02:38:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:38:13,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:38:13,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:13,518 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:38:13,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:38:13,519 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:38:13,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895628227] [2022-11-22 02:38:13,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [895628227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:38:13,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:38:13,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:38:13,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829968465] [2022-11-22 02:38:13,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:38:13,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:38:13,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:38:13,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:38:13,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:38:13,522 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 02:38:14,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:38:14,418 INFO L93 Difference]: Finished difference Result 123 states and 174 transitions. [2022-11-22 02:38:14,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:38:14,419 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2022-11-22 02:38:14,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:38:14,421 INFO L225 Difference]: With dead ends: 123 [2022-11-22 02:38:14,421 INFO L226 Difference]: Without dead ends: 74 [2022-11-22 02:38:14,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:38:14,423 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 19 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:38:14,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 198 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 02:38:14,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-22 02:38:14,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 58. [2022-11-22 02:38:14,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 50 states have internal predecessors, (68), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 02:38:14,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 81 transitions. [2022-11-22 02:38:14,438 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 81 transitions. Word has length 47 [2022-11-22 02:38:14,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:38:14,438 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 81 transitions. [2022-11-22 02:38:14,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-22 02:38:14,439 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 81 transitions. [2022-11-22 02:38:14,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-22 02:38:14,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:38:14,441 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:38:14,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-22 02:38:14,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:38:14,658 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:38:14,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:38:14,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1066513524, now seen corresponding path program 1 times [2022-11-22 02:38:14,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:38:14,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [847911974] [2022-11-22 02:38:14,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:14,659 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:38:14,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:38:14,661 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:38:14,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-22 02:38:14,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:38:14,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:38:14,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:38:15,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:38:15,895 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:38:15,895 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:38:15,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [847911974] [2022-11-22 02:38:15,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [847911974] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:38:15,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [125524063] [2022-11-22 02:38:15,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:15,896 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:38:15,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:38:15,905 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:38:15,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-22 02:38:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:38:16,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:38:16,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:16,153 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-22 02:38:16,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:38:16,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [125524063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:38:16,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:38:16,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-22 02:38:16,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606191364] [2022-11-22 02:38:16,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:38:16,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:38:16,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:38:16,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:38:16,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:38:16,156 INFO L87 Difference]: Start difference. First operand 58 states and 81 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:38:16,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:38:16,189 INFO L93 Difference]: Finished difference Result 67 states and 91 transitions. [2022-11-22 02:38:16,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:38:16,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2022-11-22 02:38:16,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:38:16,192 INFO L225 Difference]: With dead ends: 67 [2022-11-22 02:38:16,192 INFO L226 Difference]: Without dead ends: 58 [2022-11-22 02:38:16,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:38:16,193 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 0 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:38:16,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 126 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:38:16,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-22 02:38:16,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-11-22 02:38:16,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 50 states have internal predecessors, (67), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 02:38:16,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 80 transitions. [2022-11-22 02:38:16,207 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 80 transitions. Word has length 48 [2022-11-22 02:38:16,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:38:16,208 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 80 transitions. [2022-11-22 02:38:16,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:38:16,208 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 80 transitions. [2022-11-22 02:38:16,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-22 02:38:16,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:38:16,210 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:38:16,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-11-22 02:38:16,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-22 02:38:16,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:38:16,625 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:38:16,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:38:16,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1967363502, now seen corresponding path program 1 times [2022-11-22 02:38:16,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:38:16,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213075739] [2022-11-22 02:38:16,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:16,626 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:38:16,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:38:16,628 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:38:16,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-22 02:38:16,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:38:16,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:38:16,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:38:17,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:38:17,801 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:38:17,801 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:38:17,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213075739] [2022-11-22 02:38:17,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213075739] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:38:17,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [807440457] [2022-11-22 02:38:17,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:17,802 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:38:17,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:38:17,803 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:38:17,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-22 02:38:17,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:38:17,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:38:17,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-22 02:38:18,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:38:18,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [807440457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:38:18,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:38:18,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 10 [2022-11-22 02:38:18,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50696087] [2022-11-22 02:38:18,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:38:18,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:38:18,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:38:18,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:38:18,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:38:18,180 INFO L87 Difference]: Start difference. First operand 58 states and 80 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:38:18,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:38:18,368 INFO L93 Difference]: Finished difference Result 68 states and 91 transitions. [2022-11-22 02:38:18,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:38:18,369 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2022-11-22 02:38:18,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:38:18,370 INFO L225 Difference]: With dead ends: 68 [2022-11-22 02:38:18,371 INFO L226 Difference]: Without dead ends: 58 [2022-11-22 02:38:18,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:38:18,372 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 1 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:38:18,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 184 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:38:18,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-22 02:38:18,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-11-22 02:38:18,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.346938775510204) internal successors, (66), 50 states have internal predecessors, (66), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 02:38:18,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 79 transitions. [2022-11-22 02:38:18,396 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 79 transitions. Word has length 50 [2022-11-22 02:38:18,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:38:18,397 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 79 transitions. [2022-11-22 02:38:18,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:38:18,398 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 79 transitions. [2022-11-22 02:38:18,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-22 02:38:18,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:38:18,402 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:38:18,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-22 02:38:18,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-22 02:38:18,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:38:18,819 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:38:18,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:38:18,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1518257168, now seen corresponding path program 1 times [2022-11-22 02:38:18,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:38:18,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1797827986] [2022-11-22 02:38:18,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:18,821 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:38:18,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:38:18,828 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:38:18,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-22 02:38:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:38:18,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:38:18,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:19,190 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:38:19,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:38:20,001 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:38:20,001 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:38:20,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1797827986] [2022-11-22 02:38:20,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1797827986] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:38:20,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1466746527] [2022-11-22 02:38:20,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:20,002 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:38:20,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:38:20,008 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:38:20,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-22 02:38:20,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:38:20,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 02:38:20,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:20,733 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-22 02:38:20,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:38:20,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1466746527] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:38:20,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:38:20,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 12 [2022-11-22 02:38:20,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936950682] [2022-11-22 02:38:20,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:38:20,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:38:20,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:38:20,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:38:20,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:38:20,737 INFO L87 Difference]: Start difference. First operand 58 states and 79 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:38:21,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:38:21,116 INFO L93 Difference]: Finished difference Result 98 states and 133 transitions. [2022-11-22 02:38:21,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:38:21,118 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2022-11-22 02:38:21,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:38:21,119 INFO L225 Difference]: With dead ends: 98 [2022-11-22 02:38:21,119 INFO L226 Difference]: Without dead ends: 77 [2022-11-22 02:38:21,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-22 02:38:21,120 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 15 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:38:21,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 283 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:38:21,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-22 02:38:21,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2022-11-22 02:38:21,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 58 states have internal predecessors, (73), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-22 02:38:21,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2022-11-22 02:38:21,134 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 50 [2022-11-22 02:38:21,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:38:21,135 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2022-11-22 02:38:21,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:38:21,135 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2022-11-22 02:38:21,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-22 02:38:21,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:38:21,137 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:38:21,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-22 02:38:21,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-22 02:38:21,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:38:21,550 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:38:21,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:38:21,551 INFO L85 PathProgramCache]: Analyzing trace with hash 931451154, now seen corresponding path program 1 times [2022-11-22 02:38:21,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:38:21,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [978566322] [2022-11-22 02:38:21,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:21,552 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:38:21,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:38:21,553 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:38:21,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-22 02:38:21,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:38:21,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:38:21,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:38:21,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:38:22,648 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:38:22,649 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:38:22,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [978566322] [2022-11-22 02:38:22,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [978566322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:38:22,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1763473676] [2022-11-22 02:38:22,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:22,649 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:38:22,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:38:22,652 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:38:22,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-22 02:38:22,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:38:22,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:38:22,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-22 02:38:23,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:38:23,839 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-22 02:38:23,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1763473676] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:38:23,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736792542] [2022-11-22 02:38:23,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:23,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:38:23,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:38:23,843 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:38:23,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 02:38:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:38:23,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:38:23,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:24,105 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:38:24,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:38:24,628 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:38:24,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736792542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:38:24,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:38:24,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 5, 5] total 12 [2022-11-22 02:38:24,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260331275] [2022-11-22 02:38:24,629 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:38:24,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 02:38:24,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:38:24,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 02:38:24,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:38:24,631 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:38:27,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:38:27,787 INFO L93 Difference]: Finished difference Result 186 states and 270 transitions. [2022-11-22 02:38:27,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-22 02:38:27,789 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 50 [2022-11-22 02:38:27,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:38:27,791 INFO L225 Difference]: With dead ends: 186 [2022-11-22 02:38:27,791 INFO L226 Difference]: Without dead ends: 127 [2022-11-22 02:38:27,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2022-11-22 02:38:27,794 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 91 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:38:27,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 374 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-22 02:38:27,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-22 02:38:27,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 96. [2022-11-22 02:38:27,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 84 states have (on average 1.3452380952380953) internal successors, (113), 84 states have internal predecessors, (113), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-22 02:38:27,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 137 transitions. [2022-11-22 02:38:27,816 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 137 transitions. Word has length 50 [2022-11-22 02:38:27,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:38:27,817 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 137 transitions. [2022-11-22 02:38:27,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 02:38:27,817 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 137 transitions. [2022-11-22 02:38:27,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-22 02:38:27,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:38:27,819 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:38:27,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-22 02:38:28,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-22 02:38:28,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-22 02:38:28,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:38:28,428 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:38:28,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:38:28,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1265138967, now seen corresponding path program 1 times [2022-11-22 02:38:28,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:38:28,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516193847] [2022-11-22 02:38:28,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:28,429 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:38:28,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:38:28,430 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:38:28,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-22 02:38:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:38:28,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:38:28,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:28,915 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:38:28,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:38:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:38:29,877 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:38:29,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [516193847] [2022-11-22 02:38:29,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [516193847] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:38:29,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [30421267] [2022-11-22 02:38:29,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:29,877 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:38:29,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:38:29,879 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:38:29,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-22 02:38:29,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:38:29,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:38:29,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:30,579 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-22 02:38:30,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:38:30,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [30421267] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:38:30,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:38:30,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-22 02:38:30,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674619285] [2022-11-22 02:38:30,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:38:30,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:38:30,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:38:30,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:38:30,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-22 02:38:30,582 INFO L87 Difference]: Start difference. First operand 96 states and 137 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:38:31,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:38:31,044 INFO L93 Difference]: Finished difference Result 119 states and 161 transitions. [2022-11-22 02:38:31,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:38:31,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 54 [2022-11-22 02:38:31,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:38:31,047 INFO L225 Difference]: With dead ends: 119 [2022-11-22 02:38:31,047 INFO L226 Difference]: Without dead ends: 113 [2022-11-22 02:38:31,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-22 02:38:31,049 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 22 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:38:31,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 229 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:38:31,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-22 02:38:31,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2022-11-22 02:38:31,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 99 states have (on average 1.303030303030303) internal successors, (129), 99 states have internal predecessors, (129), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-22 02:38:31,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 153 transitions. [2022-11-22 02:38:31,071 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 153 transitions. Word has length 54 [2022-11-22 02:38:31,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:38:31,072 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 153 transitions. [2022-11-22 02:38:31,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:38:31,072 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 153 transitions. [2022-11-22 02:38:31,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-22 02:38:31,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:38:31,074 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:38:31,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2022-11-22 02:38:31,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-22 02:38:31,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:38:31,477 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:38:31,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:38:31,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1322397269, now seen corresponding path program 1 times [2022-11-22 02:38:31,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:38:31,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [133474295] [2022-11-22 02:38:31,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:31,479 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:38:31,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:38:31,480 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:38:31,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-22 02:38:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:38:31,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:38:31,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:31,939 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:38:31,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:38:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:38:32,828 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:38:32,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [133474295] [2022-11-22 02:38:32,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [133474295] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:38:32,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [113010758] [2022-11-22 02:38:32,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:32,829 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:38:32,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:38:32,830 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:38:32,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-22 02:38:32,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:38:32,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:38:32,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:33,183 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:38:33,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:38:33,599 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:38:33,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [113010758] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:38:33,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489672979] [2022-11-22 02:38:33,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:33,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:38:33,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:38:33,602 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:38:33,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-22 02:38:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:38:33,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:38:33,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:34,561 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-22 02:38:34,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:38:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-22 02:38:35,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489672979] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 02:38:35,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2022-11-22 02:38:35,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6, 6, 6, 8] total 17 [2022-11-22 02:38:35,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969166900] [2022-11-22 02:38:35,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:38:35,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:38:35,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:38:35,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:38:35,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-22 02:38:35,061 INFO L87 Difference]: Start difference. First operand 111 states and 153 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:38:35,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:38:35,503 INFO L93 Difference]: Finished difference Result 117 states and 158 transitions. [2022-11-22 02:38:35,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:38:35,508 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 54 [2022-11-22 02:38:35,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:38:35,510 INFO L225 Difference]: With dead ends: 117 [2022-11-22 02:38:35,510 INFO L226 Difference]: Without dead ends: 100 [2022-11-22 02:38:35,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-11-22 02:38:35,511 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 2 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:38:35,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 295 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:38:35,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-22 02:38:35,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-11-22 02:38:35,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 88 states have (on average 1.2954545454545454) internal successors, (114), 89 states have internal predecessors, (114), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-22 02:38:35,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 135 transitions. [2022-11-22 02:38:35,527 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 135 transitions. Word has length 54 [2022-11-22 02:38:35,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:38:35,527 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 135 transitions. [2022-11-22 02:38:35,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 02:38:35,528 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 135 transitions. [2022-11-22 02:38:35,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-22 02:38:35,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:38:35,530 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:38:35,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-22 02:38:35,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-22 02:38:35,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-22 02:38:36,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:38:36,133 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:38:36,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:38:36,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1182884870, now seen corresponding path program 1 times [2022-11-22 02:38:36,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:38:36,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [662669635] [2022-11-22 02:38:36,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:36,135 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:38:36,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:38:36,136 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:38:36,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-22 02:38:36,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:38:36,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:38:36,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:36,585 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:38:36,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:38:37,364 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:38:37,364 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:38:37,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [662669635] [2022-11-22 02:38:37,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [662669635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:38:37,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [584392378] [2022-11-22 02:38:37,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:37,366 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:38:37,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:38:37,367 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:38:37,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-22 02:38:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:38:37,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:38:37,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:37,683 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:38:37,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:38:38,179 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:38:38,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [584392378] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:38:38,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981660317] [2022-11-22 02:38:38,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:38,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:38:38,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:38:38,184 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:38:38,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-22 02:38:38,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:38:38,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 02:38:38,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:38,968 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:38:38,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:38:39,778 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:38:39,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981660317] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:38:39,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:38:39,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 7, 7] total 15 [2022-11-22 02:38:39,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658670783] [2022-11-22 02:38:39,779 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:38:39,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-22 02:38:39,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:38:39,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-22 02:38:39,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-22 02:38:39,784 INFO L87 Difference]: Start difference. First operand 100 states and 135 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 02:38:41,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:38:41,966 INFO L93 Difference]: Finished difference Result 224 states and 309 transitions. [2022-11-22 02:38:41,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-22 02:38:41,967 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2022-11-22 02:38:41,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:38:41,969 INFO L225 Difference]: With dead ends: 224 [2022-11-22 02:38:41,969 INFO L226 Difference]: Without dead ends: 132 [2022-11-22 02:38:41,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2022-11-22 02:38:41,971 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 175 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:38:41,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 294 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-22 02:38:41,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-22 02:38:41,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 104. [2022-11-22 02:38:41,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 92 states have (on average 1.315217391304348) internal successors, (121), 93 states have internal predecessors, (121), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-22 02:38:41,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 142 transitions. [2022-11-22 02:38:41,990 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 142 transitions. Word has length 56 [2022-11-22 02:38:41,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:38:41,991 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 142 transitions. [2022-11-22 02:38:41,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 02:38:41,991 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 142 transitions. [2022-11-22 02:38:41,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-22 02:38:41,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:38:41,993 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:38:42,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-22 02:38:42,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2022-11-22 02:38:42,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-11-22 02:38:42,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:38:42,600 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:38:42,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:38:42,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1175617949, now seen corresponding path program 1 times [2022-11-22 02:38:42,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:38:42,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036387158] [2022-11-22 02:38:42,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:42,602 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:38:42,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:38:42,604 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:38:42,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-22 02:38:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:38:42,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 02:38:42,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:43,347 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:38:43,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:38:45,089 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:38:45,090 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:38:45,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036387158] [2022-11-22 02:38:45,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036387158] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:38:45,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2037263927] [2022-11-22 02:38:45,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:45,091 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:38:45,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:38:45,096 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:38:45,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-22 02:38:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:38:45,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 02:38:45,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:38:45,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:38:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:38:46,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2037263927] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:38:46,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209769890] [2022-11-22 02:38:46,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:38:46,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:38:46,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:38:46,295 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:38:46,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-22 02:38:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:38:46,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:38:46,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:47,093 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:38:47,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:38:49,070 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:38:49,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209769890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:38:49,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:38:49,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2022-11-22 02:38:49,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577648410] [2022-11-22 02:38:49,072 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:38:49,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 02:38:49,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:38:49,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 02:38:49,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2022-11-22 02:38:49,074 INFO L87 Difference]: Start difference. First operand 104 states and 142 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 02:38:54,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:38:54,440 INFO L93 Difference]: Finished difference Result 271 states and 386 transitions. [2022-11-22 02:38:54,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-22 02:38:54,441 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 63 [2022-11-22 02:38:54,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:38:54,443 INFO L225 Difference]: With dead ends: 271 [2022-11-22 02:38:54,443 INFO L226 Difference]: Without dead ends: 175 [2022-11-22 02:38:54,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=316, Invalid=554, Unknown=0, NotChecked=0, Total=870 [2022-11-22 02:38:54,445 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 233 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:38:54,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 615 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-22 02:38:54,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-22 02:38:54,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 118. [2022-11-22 02:38:54,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 106 states have (on average 1.3584905660377358) internal successors, (144), 107 states have internal predecessors, (144), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-22 02:38:54,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 165 transitions. [2022-11-22 02:38:54,474 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 165 transitions. Word has length 63 [2022-11-22 02:38:54,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:38:54,475 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 165 transitions. [2022-11-22 02:38:54,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 02:38:54,476 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 165 transitions. [2022-11-22 02:38:54,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-22 02:38:54,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:38:54,477 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:38:54,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-22 02:38:54,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2022-11-22 02:38:54,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-11-22 02:38:55,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:38:55,084 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:38:55,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:38:55,085 INFO L85 PathProgramCache]: Analyzing trace with hash 369916166, now seen corresponding path program 2 times [2022-11-22 02:38:55,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:38:55,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670219941] [2022-11-22 02:38:55,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:38:55,086 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:38:55,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:38:55,087 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:38:55,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-22 02:38:55,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:38:55,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:38:55,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:38:55,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:56,074 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:38:56,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:38:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:38:58,150 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:38:58,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670219941] [2022-11-22 02:38:58,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670219941] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:38:58,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [97068992] [2022-11-22 02:38:58,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:38:58,151 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:38:58,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:38:58,152 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:38:58,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-22 02:38:58,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:38:58,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:38:58,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:38:58,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:38:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:38:58,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:38:59,600 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:38:59,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [97068992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:38:59,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989716820] [2022-11-22 02:38:59,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:38:59,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:38:59,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:38:59,602 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:38:59,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-22 02:38:59,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:38:59,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:38:59,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:38:59,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:39:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:39:00,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:39:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:39:03,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989716820] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:39:03,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:39:03,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 27 [2022-11-22 02:39:03,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274374015] [2022-11-22 02:39:03,150 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:39:03,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-22 02:39:03,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:39:03,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-22 02:39:03,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=469, Unknown=0, NotChecked=0, Total=702 [2022-11-22 02:39:03,153 INFO L87 Difference]: Start difference. First operand 118 states and 165 transitions. Second operand has 27 states, 27 states have (on average 4.074074074074074) internal successors, (110), 27 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 02:39:09,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:39:09,593 INFO L93 Difference]: Finished difference Result 294 states and 417 transitions. [2022-11-22 02:39:09,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-22 02:39:09,594 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.074074074074074) internal successors, (110), 27 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 68 [2022-11-22 02:39:09,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:39:09,596 INFO L225 Difference]: With dead ends: 294 [2022-11-22 02:39:09,596 INFO L226 Difference]: Without dead ends: 184 [2022-11-22 02:39:09,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=581, Invalid=1059, Unknown=0, NotChecked=0, Total=1640 [2022-11-22 02:39:09,598 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 503 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:39:09,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 726 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-22 02:39:09,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-22 02:39:09,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 128. [2022-11-22 02:39:09,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 116 states have (on average 1.3879310344827587) internal successors, (161), 117 states have internal predecessors, (161), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-22 02:39:09,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 182 transitions. [2022-11-22 02:39:09,625 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 182 transitions. Word has length 68 [2022-11-22 02:39:09,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:39:09,625 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 182 transitions. [2022-11-22 02:39:09,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.074074074074074) internal successors, (110), 27 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 02:39:09,626 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 182 transitions. [2022-11-22 02:39:09,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-22 02:39:09,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:39:09,628 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:39:09,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-11-22 02:39:09,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-22 02:39:10,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-11-22 02:39:10,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:39:10,232 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:39:10,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:39:10,232 INFO L85 PathProgramCache]: Analyzing trace with hash -542294301, now seen corresponding path program 2 times [2022-11-22 02:39:10,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:39:10,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [382889182] [2022-11-22 02:39:10,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:39:10,233 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:39:10,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:39:10,234 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:39:10,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-22 02:39:10,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:39:10,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:39:10,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 02:39:10,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:39:12,249 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:39:12,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:39:16,849 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:39:16,850 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:39:16,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [382889182] [2022-11-22 02:39:16,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [382889182] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:39:16,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1263070912] [2022-11-22 02:39:16,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:39:16,850 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:39:16,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:39:16,852 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:39:16,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-22 02:39:17,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:39:17,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:39:17,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 02:39:17,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:39:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:39:17,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:39:19,237 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:39:19,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1263070912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:39:19,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267348871] [2022-11-22 02:39:19,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:39:19,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:39:19,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:39:19,240 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:39:19,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-22 02:39:19,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:39:19,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:39:19,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:39:19,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:39:20,593 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:39:20,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:39:26,754 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:39:26,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267348871] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:39:26,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:39:26,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 38 [2022-11-22 02:39:26,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106328506] [2022-11-22 02:39:26,755 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:39:26,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-22 02:39:26,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:39:26,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-22 02:39:26,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=959, Unknown=0, NotChecked=0, Total=1406 [2022-11-22 02:39:26,757 INFO L87 Difference]: Start difference. First operand 128 states and 182 transitions. Second operand has 38 states, 38 states have (on average 3.9210526315789473) internal successors, (149), 38 states have internal predecessors, (149), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 02:39:46,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:39:46,020 INFO L93 Difference]: Finished difference Result 397 states and 586 transitions. [2022-11-22 02:39:46,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-22 02:39:46,022 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.9210526315789473) internal successors, (149), 38 states have internal predecessors, (149), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 81 [2022-11-22 02:39:46,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:39:46,025 INFO L225 Difference]: With dead ends: 397 [2022-11-22 02:39:46,026 INFO L226 Difference]: Without dead ends: 277 [2022-11-22 02:39:46,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=1210, Invalid=2330, Unknown=0, NotChecked=0, Total=3540 [2022-11-22 02:39:46,029 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 837 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 1746 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:39:46,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [837 Valid, 1746 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 10.6s Time] [2022-11-22 02:39:46,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-11-22 02:39:46,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 154. [2022-11-22 02:39:46,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 142 states have (on average 1.4366197183098592) internal successors, (204), 143 states have internal predecessors, (204), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-22 02:39:46,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 225 transitions. [2022-11-22 02:39:46,067 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 225 transitions. Word has length 81 [2022-11-22 02:39:46,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:39:46,068 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 225 transitions. [2022-11-22 02:39:46,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.9210526315789473) internal successors, (149), 38 states have internal predecessors, (149), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 02:39:46,068 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 225 transitions. [2022-11-22 02:39:46,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-22 02:39:46,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:39:46,070 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:39:46,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-22 02:39:46,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-22 02:39:46,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2022-11-22 02:39:46,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:39:46,678 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:39:46,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:39:46,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1098654470, now seen corresponding path program 3 times [2022-11-22 02:39:46,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:39:46,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839691697] [2022-11-22 02:39:46,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:39:46,680 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:39:46,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:39:46,681 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:39:46,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-22 02:39:46,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-11-22 02:39:46,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:39:46,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-22 02:39:46,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:39:53,039 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:39:53,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:40:06,221 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:40:06,221 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:40:06,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839691697] [2022-11-22 02:40:06,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839691697] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:40:06,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1733878991] [2022-11-22 02:40:06,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:40:06,222 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:40:06,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:40:06,225 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:40:06,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-22 02:40:06,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-11-22 02:40:06,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:40:06,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-22 02:40:06,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:40:25,010 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:40:25,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:40:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:40:29,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1733878991] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:40:29,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975431224] [2022-11-22 02:40:29,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:40:29,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:40:29,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:40:29,287 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:40:29,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-22 02:40:29,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-11-22 02:40:29,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:40:29,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 02:40:29,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:40:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 26 proven. 273 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:40:41,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:40:55,854 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 4 proven. 283 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:40:55,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975431224] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:40:55,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:40:55,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 25, 25, 19, 19] total 90 [2022-11-22 02:40:55,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280421269] [2022-11-22 02:40:55,856 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:40:55,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-11-22 02:40:55,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:40:55,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-11-22 02:40:55,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=7224, Unknown=6, NotChecked=0, Total=8010 [2022-11-22 02:40:55,861 INFO L87 Difference]: Start difference. First operand 154 states and 225 transitions. Second operand has 90 states, 90 states have (on average 2.977777777777778) internal successors, (268), 84 states have internal predecessors, (268), 5 states have call successors, (13), 2 states have call predecessors, (13), 8 states have return successors, (16), 11 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-22 02:43:21,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:46:51,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:46:51,775 INFO L93 Difference]: Finished difference Result 744 states and 1377 transitions. [2022-11-22 02:46:51,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2022-11-22 02:46:51,777 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.977777777777778) internal successors, (268), 84 states have internal predecessors, (268), 5 states have call successors, (13), 2 states have call predecessors, (13), 8 states have return successors, (16), 11 states have call predecessors, (16), 5 states have call successors, (16) Word has length 92 [2022-11-22 02:46:51,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:46:51,782 INFO L225 Difference]: With dead ends: 744 [2022-11-22 02:46:51,783 INFO L226 Difference]: Without dead ends: 592 [2022-11-22 02:46:51,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 811 GetRequests, 472 SyntacticMatches, 3 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39718 ImplicationChecksByTransitivity, 327.9s TimeCoverageRelationStatistics Valid=16678, Invalid=97219, Unknown=9, NotChecked=0, Total=113906 [2022-11-22 02:46:51,805 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 4962 mSDsluCounter, 5172 mSDsCounter, 0 mSdLazyCounter, 11948 mSolverCounterSat, 548 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5013 SdHoareTripleChecker+Valid, 5289 SdHoareTripleChecker+Invalid, 12497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 11948 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 83.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:46:51,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5013 Valid, 5289 Invalid, 12497 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [548 Valid, 11948 Invalid, 1 Unknown, 0 Unchecked, 83.2s Time] [2022-11-22 02:46:51,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-11-22 02:46:51,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 184. [2022-11-22 02:46:51,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 169 states have (on average 1.455621301775148) internal successors, (246), 171 states have internal predecessors, (246), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 9 states have call predecessors, (28), 7 states have call successors, (28) [2022-11-22 02:46:51,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 282 transitions. [2022-11-22 02:46:51,932 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 282 transitions. Word has length 92 [2022-11-22 02:46:51,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:46:51,934 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 282 transitions. [2022-11-22 02:46:51,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.977777777777778) internal successors, (268), 84 states have internal predecessors, (268), 5 states have call successors, (13), 2 states have call predecessors, (13), 8 states have return successors, (16), 11 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-22 02:46:51,934 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 282 transitions. [2022-11-22 02:46:51,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-22 02:46:51,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:46:51,936 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:46:51,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-22 02:46:52,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-22 02:46:52,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-11-22 02:46:52,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:46:52,539 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:46:52,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:46:52,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1995923427, now seen corresponding path program 3 times [2022-11-22 02:46:52,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:46:52,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330613102] [2022-11-22 02:46:52,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:46:52,541 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:46:52,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:46:52,542 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:46:52,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-22 02:46:52,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-11-22 02:46:52,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:46:52,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-22 02:46:52,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:46:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:46:58,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:47:12,885 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:47:12,885 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:47:12,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330613102] [2022-11-22 02:47:12,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330613102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:47:12,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2111323352] [2022-11-22 02:47:12,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:47:12,886 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:47:12,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:47:12,887 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:47:12,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-22 02:47:13,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-11-22 02:47:13,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:47:13,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-22 02:47:13,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:47:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:47:15,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:47:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:47:18,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2111323352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:47:18,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140837610] [2022-11-22 02:47:18,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:47:18,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:47:18,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:47:18,946 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:47:18,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8315e5db-b772-4a0d-9623-0b4843fca403/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-22 02:47:19,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-11-22 02:47:19,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:47:19,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-22 02:47:19,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:47:20,461 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:47:20,461 INFO L328 TraceCheckSpWp]: Computing backward predicates...