./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI --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 6d3233ccb864b75538f8fed6a586b5cbac020cb4ad9bbb5d5357658307afa1e5 --- 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-5e519f3 [2022-11-03 02:52:12,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:52:12,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:52:12,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:52:12,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:52:12,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:52:12,284 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:52:12,286 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:52:12,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:52:12,289 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:52:12,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:52:12,291 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:52:12,292 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:52:12,293 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:52:12,294 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:52:12,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:52:12,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:52:12,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:52:12,304 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:52:12,306 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:52:12,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:52:12,310 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:52:12,313 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:52:12,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:52:12,320 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:52:12,327 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:52:12,327 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:52:12,328 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:52:12,329 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:52:12,330 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:52:12,331 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:52:12,333 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:52:12,334 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:52:12,335 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:52:12,338 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:52:12,338 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:52:12,339 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:52:12,339 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:52:12,340 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:52:12,341 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:52:12,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:52:12,342 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:52:12,385 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:52:12,385 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:52:12,386 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:52:12,386 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:52:12,387 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:52:12,387 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:52:12,388 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:52:12,388 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:52:12,388 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:52:12,388 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:52:12,389 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:52:12,389 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:52:12,390 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:52:12,390 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:52:12,390 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:52:12,390 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:52:12,391 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:52:12,391 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:52:12,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:52:12,392 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:52:12,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:52:12,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:52:12,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:52:12,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:52:12,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:52:12,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:52:12,393 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:52:12,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:52:12,395 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:52:12,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:52:12,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:52:12,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:52:12,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:52:12,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:52:12,396 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:52:12,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:52:12,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:52:12,397 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:52:12,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:52:12,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:52:12,398 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:52:12,399 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_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d3233ccb864b75538f8fed6a586b5cbac020cb4ad9bbb5d5357658307afa1e5 [2022-11-03 02:52:12,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:52:12,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:52:12,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:52:12,737 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:52:12,738 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:52:12,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c [2022-11-03 02:52:12,831 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/data/ccf7c0459/2b112f5a78fb44388ad54141894455f7/FLAG8253f998f [2022-11-03 02:52:13,327 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:52:13,328 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c [2022-11-03 02:52:13,335 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/data/ccf7c0459/2b112f5a78fb44388ad54141894455f7/FLAG8253f998f [2022-11-03 02:52:13,772 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/data/ccf7c0459/2b112f5a78fb44388ad54141894455f7 [2022-11-03 02:52:13,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:52:13,776 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:52:13,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:52:13,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:52:13,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:52:13,788 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:52:13" (1/1) ... [2022-11-03 02:52:13,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@785c55f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:13, skipping insertion in model container [2022-11-03 02:52:13,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:52:13" (1/1) ... [2022-11-03 02:52:13,797 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:52:13,841 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:52:14,051 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c[1997,2010] [2022-11-03 02:52:14,055 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c[2366,2379] [2022-11-03 02:52:14,096 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:52:14,104 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:52:14,117 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c[1997,2010] [2022-11-03 02:52:14,119 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c[2366,2379] [2022-11-03 02:52:14,142 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:52:14,155 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:52:14,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:14 WrapperNode [2022-11-03 02:52:14,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:52:14,157 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:52:14,157 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:52:14,157 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:52:14,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:14" (1/1) ... [2022-11-03 02:52:14,195 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:14" (1/1) ... [2022-11-03 02:52:14,227 INFO L138 Inliner]: procedures = 27, calls = 17, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 133 [2022-11-03 02:52:14,232 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:52:14,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:52:14,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:52:14,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:52:14,244 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:14" (1/1) ... [2022-11-03 02:52:14,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:14" (1/1) ... [2022-11-03 02:52:14,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:14" (1/1) ... [2022-11-03 02:52:14,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:14" (1/1) ... [2022-11-03 02:52:14,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:14" (1/1) ... [2022-11-03 02:52:14,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:14" (1/1) ... [2022-11-03 02:52:14,273 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:14" (1/1) ... [2022-11-03 02:52:14,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:14" (1/1) ... [2022-11-03 02:52:14,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:52:14,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:52:14,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:52:14,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:52:14,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:14" (1/1) ... [2022-11-03 02:52:14,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:52:14,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:52:14,326 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:52:14,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:52:14,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:52:14,372 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-11-03 02:52:14,372 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-11-03 02:52:14,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:52:14,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:52:14,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:52:14,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:52:14,373 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:52:14,493 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:52:14,495 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:52:14,970 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:52:15,041 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:52:15,041 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:52:15,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:52:15 BoogieIcfgContainer [2022-11-03 02:52:15,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:52:15,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:52:15,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:52:15,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:52:15,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:52:13" (1/3) ... [2022-11-03 02:52:15,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6470284f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:52:15, skipping insertion in model container [2022-11-03 02:52:15,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:14" (2/3) ... [2022-11-03 02:52:15,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6470284f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:52:15, skipping insertion in model container [2022-11-03 02:52:15,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:52:15" (3/3) ... [2022-11-03 02:52:15,053 INFO L112 eAbstractionObserver]: Analyzing ICFG square_6+soft_float_3a.c.cil.c [2022-11-03 02:52:15,073 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:52:15,074 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 02:52:15,131 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:52:15,138 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;@7a6315be, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:52:15,138 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 02:52:15,142 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) [2022-11-03 02:52:15,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:52:15,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:15,149 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:52:15,150 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:15,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:15,155 INFO L85 PathProgramCache]: Analyzing trace with hash 7112936, now seen corresponding path program 1 times [2022-11-03 02:52:15,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:15,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930395033] [2022-11-03 02:52:15,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:15,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:15,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:52:15,266 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:52:15,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:52:15,293 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:52:15,295 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:52:15,297 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-11-03 02:52:15,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-03 02:52:15,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:52:15,304 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:52:15,308 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:52:15,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:52:15 BoogieIcfgContainer [2022-11-03 02:52:15,331 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:52:15,334 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:52:15,334 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:52:15,334 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:52:15,335 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:52:15" (3/4) ... [2022-11-03 02:52:15,337 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:52:15,338 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:52:15,339 INFO L158 Benchmark]: Toolchain (without parser) took 1562.46ms. Allocated memory is still 113.2MB. Free memory was 77.7MB in the beginning and 45.4MB in the end (delta: 32.3MB). Peak memory consumption was 30.8MB. Max. memory is 16.1GB. [2022-11-03 02:52:15,340 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 113.2MB. Free memory was 87.2MB in the beginning and 87.2MB in the end (delta: 28.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:52:15,342 INFO L158 Benchmark]: CACSL2BoogieTranslator took 372.81ms. Allocated memory is still 113.2MB. Free memory was 77.4MB in the beginning and 85.2MB in the end (delta: -7.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 02:52:15,342 INFO L158 Benchmark]: Boogie Procedure Inliner took 75.48ms. Allocated memory is still 113.2MB. Free memory was 85.2MB in the beginning and 83.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:52:15,348 INFO L158 Benchmark]: Boogie Preprocessor took 44.24ms. Allocated memory is still 113.2MB. Free memory was 83.1MB in the beginning and 81.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:52:15,350 INFO L158 Benchmark]: RCFGBuilder took 766.23ms. Allocated memory is still 113.2MB. Free memory was 81.6MB in the beginning and 60.0MB in the end (delta: 21.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-11-03 02:52:15,351 INFO L158 Benchmark]: TraceAbstraction took 284.69ms. Allocated memory is still 113.2MB. Free memory was 59.1MB in the beginning and 45.4MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-03 02:52:15,351 INFO L158 Benchmark]: Witness Printer took 4.01ms. Allocated memory is still 113.2MB. Free memory is still 45.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:52:15,360 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 113.2MB. Free memory was 87.2MB in the beginning and 87.2MB in the end (delta: 28.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 372.81ms. Allocated memory is still 113.2MB. Free memory was 77.4MB in the beginning and 85.2MB in the end (delta: -7.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 75.48ms. Allocated memory is still 113.2MB. Free memory was 85.2MB in the beginning and 83.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.24ms. Allocated memory is still 113.2MB. Free memory was 83.1MB in the beginning and 81.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 766.23ms. Allocated memory is still 113.2MB. Free memory was 81.6MB in the beginning and 60.0MB in the end (delta: 21.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 284.69ms. Allocated memory is still 113.2MB. Free memory was 59.1MB in the beginning and 45.4MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Witness Printer took 4.01ms. Allocated memory is still 113.2MB. Free memory is still 45.4MB. 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 < 1.399f) 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: 0.2s, 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 [2022-11-03 02:52:15,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI --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 6d3233ccb864b75538f8fed6a586b5cbac020cb4ad9bbb5d5357658307afa1e5 --- 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-5e519f3 [2022-11-03 02:52:17,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:52:17,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:52:17,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:52:17,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:52:17,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:52:17,859 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:52:17,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:52:17,869 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:52:17,877 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:52:17,878 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:52:17,880 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:52:17,881 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:52:17,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:52:17,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:52:17,886 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:52:17,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:52:17,889 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:52:17,891 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:52:17,899 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:52:17,901 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:52:17,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:52:17,905 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:52:17,907 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:52:17,916 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:52:17,916 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:52:17,916 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:52:17,918 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:52:17,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:52:17,920 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:52:17,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:52:17,921 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:52:17,923 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:52:17,924 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:52:17,925 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:52:17,926 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:52:17,926 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:52:17,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:52:17,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:52:17,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:52:17,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:52:17,930 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 02:52:17,981 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:52:17,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:52:17,982 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:52:17,983 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:52:17,984 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:52:17,984 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:52:17,984 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:52:17,985 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:52:17,985 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:52:17,985 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:52:17,986 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:52:17,986 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:52:17,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:52:17,988 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:52:17,988 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:52:17,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:52:17,988 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:52:17,989 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:52:17,989 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:52:17,989 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:52:17,989 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:52:17,990 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:52:17,990 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:52:17,990 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:52:17,990 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:52:17,990 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:52:17,991 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:52:17,991 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:52:17,991 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:52:17,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:52:17,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:52:17,992 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:52:17,992 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:52:17,993 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:52:17,993 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:52:17,993 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:52:17,993 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:52:17,994 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:52:17,994 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_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d3233ccb864b75538f8fed6a586b5cbac020cb4ad9bbb5d5357658307afa1e5 [2022-11-03 02:52:18,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:52:18,361 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:52:18,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:52:18,364 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:52:18,365 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:52:18,367 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c [2022-11-03 02:52:18,439 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/data/cfab9aa67/0029b38a397f4defab964abf2761f9fd/FLAG3757a8591 [2022-11-03 02:52:19,022 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:52:19,027 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c [2022-11-03 02:52:19,045 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/data/cfab9aa67/0029b38a397f4defab964abf2761f9fd/FLAG3757a8591 [2022-11-03 02:52:19,402 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/data/cfab9aa67/0029b38a397f4defab964abf2761f9fd [2022-11-03 02:52:19,404 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:52:19,406 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:52:19,407 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:52:19,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:52:19,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:52:19,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:52:19" (1/1) ... [2022-11-03 02:52:19,417 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@388c2c8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:19, skipping insertion in model container [2022-11-03 02:52:19,417 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:52:19" (1/1) ... [2022-11-03 02:52:19,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:52:19,464 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:52:19,678 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c[1997,2010] [2022-11-03 02:52:19,683 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c[2366,2379] [2022-11-03 02:52:19,780 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:52:19,805 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:52:19,833 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c[1997,2010] [2022-11-03 02:52:19,841 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/sv-benchmarks/c/combinations/square_6+soft_float_3a.c.cil.c[2366,2379] [2022-11-03 02:52:19,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:52:19,908 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:52:19,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:19 WrapperNode [2022-11-03 02:52:19,916 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:52:19,917 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:52:19,917 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:52:19,918 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:52:19,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:19" (1/1) ... [2022-11-03 02:52:19,948 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:19" (1/1) ... [2022-11-03 02:52:19,985 INFO L138 Inliner]: procedures = 28, calls = 17, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 129 [2022-11-03 02:52:19,986 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:52:19,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:52:19,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:52:19,988 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:52:19,996 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:19" (1/1) ... [2022-11-03 02:52:19,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:19" (1/1) ... [2022-11-03 02:52:20,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:19" (1/1) ... [2022-11-03 02:52:20,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:19" (1/1) ... [2022-11-03 02:52:20,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:19" (1/1) ... [2022-11-03 02:52:20,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:19" (1/1) ... [2022-11-03 02:52:20,041 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:19" (1/1) ... [2022-11-03 02:52:20,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:19" (1/1) ... [2022-11-03 02:52:20,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:52:20,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:52:20,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:52:20,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:52:20,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:19" (1/1) ... [2022-11-03 02:52:20,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:52:20,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:52:20,076 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:52:20,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:52:20,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:52:20,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 02:52:20,120 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-11-03 02:52:20,120 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-11-03 02:52:20,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:52:20,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:52:20,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:52:20,121 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:52:20,200 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:52:20,202 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:52:22,767 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:52:22,774 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:52:22,774 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:52:22,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:52:22 BoogieIcfgContainer [2022-11-03 02:52:22,776 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:52:22,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:52:22,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:52:22,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:52:22,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:52:19" (1/3) ... [2022-11-03 02:52:22,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63644c5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:52:22, skipping insertion in model container [2022-11-03 02:52:22,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:52:19" (2/3) ... [2022-11-03 02:52:22,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63644c5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:52:22, skipping insertion in model container [2022-11-03 02:52:22,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:52:22" (3/3) ... [2022-11-03 02:52:22,794 INFO L112 eAbstractionObserver]: Analyzing ICFG square_6+soft_float_3a.c.cil.c [2022-11-03 02:52:22,813 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:52:22,813 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 02:52:22,874 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:52:22,881 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;@539be1c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:52:22,881 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 02:52:22,886 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) [2022-11-03 02:52:22,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 02:52:22,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:22,894 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:22,894 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:22,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:22,900 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2022-11-03 02:52:22,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:52:22,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [117049285] [2022-11-03 02:52:22,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:22,913 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:52:22,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:52:22,921 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:52:22,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:52:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:23,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 02:52:23,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:23,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:52:23,498 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:52:23,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [117049285] [2022-11-03 02:52:23,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [117049285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:23,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:23,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:52:23,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642133211] [2022-11-03 02:52:23,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:23,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:52:23,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:52:23,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:52:23,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:52:23,533 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) [2022-11-03 02:52:23,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:23,561 INFO L93 Difference]: Finished difference Result 115 states and 173 transitions. [2022-11-03 02:52:23,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:52:23,566 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 [2022-11-03 02:52:23,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:23,574 INFO L225 Difference]: With dead ends: 115 [2022-11-03 02:52:23,574 INFO L226 Difference]: Without dead ends: 51 [2022-11-03 02:52:23,577 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 [2022-11-03 02:52:23,580 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 [2022-11-03 02:52:23,583 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] [2022-11-03 02:52:23,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-03 02:52:23,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-03 02:52:23,633 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) [2022-11-03 02:52:23,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2022-11-03 02:52:23,643 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 7 [2022-11-03 02:52:23,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:23,643 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2022-11-03 02:52:23,644 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) [2022-11-03 02:52:23,644 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2022-11-03 02:52:23,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 02:52:23,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:23,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:23,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:23,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:52:23,853 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:23,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:23,854 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2022-11-03 02:52:23,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:52:23,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [387152557] [2022-11-03 02:52:23,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:23,856 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:52:23,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:52:23,857 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:52:23,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 03:00:41,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:00:41,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:00:41,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:00:56,462 WARN L833 $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 [2022-11-03 03:01:29,900 WARN L833 $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 (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))) (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (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 (/ 1399.0 1000.0)))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0))))) is different from false [2022-11-03 03:01:31,979 WARN L855 $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 (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))) (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (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 (/ 1399.0 1000.0)))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0))))) is different from true [2022-11-03 03:01:31,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:01:31,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:01:31,980 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:01:31,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [387152557] [2022-11-03 03:01:31,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [387152557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:01:31,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:01:31,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:01:31,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875305217] [2022-11-03 03:01:31,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:01:31,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:01:31,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:01:31,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:01:31,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2022-11-03 03:01:31,984 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) [2022-11-03 03:01:34,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 03:01:34,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:01:34,598 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2022-11-03 03:01:34,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:01:34,599 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 [2022-11-03 03:01:34,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:01:34,600 INFO L225 Difference]: With dead ends: 51 [2022-11-03 03:01:34,601 INFO L226 Difference]: Without dead ends: 46 [2022-11-03 03:01:34,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=18, Invalid=17, Unknown=3, NotChecked=18, Total=56 [2022-11-03 03:01:34,602 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 65 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s 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, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:01:34,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 175 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 1 Unknown, 135 Unchecked, 2.4s Time] [2022-11-03 03:01:34,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-03 03:01:34,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-03 03:01:34,610 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) [2022-11-03 03:01:34,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 65 transitions. [2022-11-03 03:01:34,612 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 65 transitions. Word has length 7 [2022-11-03 03:01:34,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:01:34,612 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 65 transitions. [2022-11-03 03:01:34,613 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) [2022-11-03 03:01:34,613 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 65 transitions. [2022-11-03 03:01:34,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 03:01:34,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:01:34,615 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] [2022-11-03 03:01:34,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:01:34,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:01:34,815 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:01:34,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:01:34,816 INFO L85 PathProgramCache]: Analyzing trace with hash 220430878, now seen corresponding path program 1 times [2022-11-03 03:01:34,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:01:34,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844267489] [2022-11-03 03:01:34,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:01:34,817 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:01:34,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:01:34,819 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:01:34,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 03:01:34,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:34,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:01:34,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:01:35,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:01:35,093 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:01:35,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844267489] [2022-11-03 03:01:35,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844267489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:01:35,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:01:35,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:01:35,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030659397] [2022-11-03 03:01:35,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:01:35,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:01:35,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:01:35,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:01:35,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:01:35,096 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) [2022-11-03 03:01:35,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:01:35,463 INFO L93 Difference]: Finished difference Result 102 states and 148 transitions. [2022-11-03 03:01:35,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:01:35,464 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 [2022-11-03 03:01:35,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:01:35,467 INFO L225 Difference]: With dead ends: 102 [2022-11-03 03:01:35,467 INFO L226 Difference]: Without dead ends: 60 [2022-11-03 03:01:35,468 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 [2022-11-03 03:01:35,469 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 16 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:01:35,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 143 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:01:35,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-03 03:01:35,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2022-11-03 03:01:35,480 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) [2022-11-03 03:01:35,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 71 transitions. [2022-11-03 03:01:35,481 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 71 transitions. Word has length 42 [2022-11-03 03:01:35,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:01:35,482 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 71 transitions. [2022-11-03 03:01:35,482 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) [2022-11-03 03:01:35,482 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 71 transitions. [2022-11-03 03:01:35,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 03:01:35,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:01:35,484 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] [2022-11-03 03:01:35,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-11-03 03:01:35,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:01:35,697 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:01:35,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:01:35,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1744233432, now seen corresponding path program 1 times [2022-11-03 03:01:35,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:01:35,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2036665306] [2022-11-03 03:01:35,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:01:35,699 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:01:35,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:01:35,705 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:01:35,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 03:01:35,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:35,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:01:35,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:35,984 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:01:35,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:01:35,988 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:01:35,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2036665306] [2022-11-03 03:01:35,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2036665306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:01:35,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:01:35,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:01:35,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066743940] [2022-11-03 03:01:35,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:01:35,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:01:35,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:01:35,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:01:35,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:01:35,997 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) [2022-11-03 03:01:36,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:01:36,309 INFO L93 Difference]: Finished difference Result 106 states and 151 transitions. [2022-11-03 03:01:36,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:01:36,310 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 [2022-11-03 03:01:36,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:01:36,311 INFO L225 Difference]: With dead ends: 106 [2022-11-03 03:01:36,311 INFO L226 Difference]: Without dead ends: 63 [2022-11-03 03:01:36,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:01:36,313 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 10 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:01:36,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 157 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:01:36,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-03 03:01:36,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2022-11-03 03:01:36,327 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) [2022-11-03 03:01:36,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2022-11-03 03:01:36,328 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 45 [2022-11-03 03:01:36,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:01:36,329 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2022-11-03 03:01:36,329 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) [2022-11-03 03:01:36,329 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2022-11-03 03:01:36,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 03:01:36,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:01:36,331 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] [2022-11-03 03:01:36,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:01:36,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:01:36,531 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:01:36,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:01:36,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1089123319, now seen corresponding path program 1 times [2022-11-03 03:01:36,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:01:36,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1448536556] [2022-11-03 03:01:36,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:01:36,533 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:01:36,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:01:36,535 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:01:36,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 03:01:36,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:36,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:01:36,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:36,762 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:01:36,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:01:36,763 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:01:36,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1448536556] [2022-11-03 03:01:36,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1448536556] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:01:36,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:01:36,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:01:36,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948993761] [2022-11-03 03:01:36,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:01:36,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:01:36,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:01:36,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:01:36,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:01:36,769 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) [2022-11-03 03:01:37,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:01:37,180 INFO L93 Difference]: Finished difference Result 115 states and 163 transitions. [2022-11-03 03:01:37,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:01:37,181 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 [2022-11-03 03:01:37,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:01:37,183 INFO L225 Difference]: With dead ends: 115 [2022-11-03 03:01:37,183 INFO L226 Difference]: Without dead ends: 67 [2022-11-03 03:01:37,183 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 [2022-11-03 03:01:37,184 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 16 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:01:37,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 150 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:01:37,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-03 03:01:37,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2022-11-03 03:01:37,196 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) [2022-11-03 03:01:37,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2022-11-03 03:01:37,198 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 46 [2022-11-03 03:01:37,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:01:37,198 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2022-11-03 03:01:37,198 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) [2022-11-03 03:01:37,199 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2022-11-03 03:01:37,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 03:01:37,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:01:37,200 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] [2022-11-03 03:01:37,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:01:37,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:01:37,405 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:01:37,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:01:37,406 INFO L85 PathProgramCache]: Analyzing trace with hash 957340839, now seen corresponding path program 1 times [2022-11-03 03:01:37,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:01:37,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [311677473] [2022-11-03 03:01:37,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:01:37,407 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:01:37,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:01:37,407 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:01:37,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 03:01:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:37,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:01:37,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:01:37,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:01:37,711 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:01:37,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [311677473] [2022-11-03 03:01:37,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [311677473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:01:37,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:01:37,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:01:37,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220034396] [2022-11-03 03:01:37,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:01:37,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:01:37,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:01:37,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:01:37,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:01:37,713 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) [2022-11-03 03:01:38,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:01:38,340 INFO L93 Difference]: Finished difference Result 123 states and 174 transitions. [2022-11-03 03:01:38,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:01:38,341 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 [2022-11-03 03:01:38,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:01:38,342 INFO L225 Difference]: With dead ends: 123 [2022-11-03 03:01:38,342 INFO L226 Difference]: Without dead ends: 74 [2022-11-03 03:01:38,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:01:38,343 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 19 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:01:38,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 198 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:01:38,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-03 03:01:38,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 58. [2022-11-03 03:01:38,353 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) [2022-11-03 03:01:38,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 81 transitions. [2022-11-03 03:01:38,354 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 81 transitions. Word has length 47 [2022-11-03 03:01:38,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:01:38,355 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 81 transitions. [2022-11-03 03:01:38,355 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) [2022-11-03 03:01:38,355 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 81 transitions. [2022-11-03 03:01:38,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 03:01:38,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:01:38,357 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] [2022-11-03 03:01:38,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-11-03 03:01:38,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:01:38,570 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:01:38,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:01:38,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1066513524, now seen corresponding path program 1 times [2022-11-03 03:01:38,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:01:38,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672025259] [2022-11-03 03:01:38,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:01:38,571 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:01:38,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:01:38,572 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:01:38,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 03:01:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:38,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:01:38,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:38,933 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:01:38,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:01:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:01:39,571 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:01:39,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672025259] [2022-11-03 03:01:39,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672025259] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:01:39,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1528196623] [2022-11-03 03:01:39,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:01:39,572 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:01:39,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:01:39,579 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:01:39,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-03 03:01:39,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:39,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:01:39,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 03:01:39,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:01:39,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1528196623] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:01:39,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:01:39,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-03 03:01:39,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185972072] [2022-11-03 03:01:39,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:01:39,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:01:39,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:01:39,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:01:39,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:01:39,784 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) [2022-11-03 03:01:39,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:01:39,810 INFO L93 Difference]: Finished difference Result 67 states and 91 transitions. [2022-11-03 03:01:39,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:01:39,811 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 [2022-11-03 03:01:39,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:01:39,812 INFO L225 Difference]: With dead ends: 67 [2022-11-03 03:01:39,812 INFO L226 Difference]: Without dead ends: 58 [2022-11-03 03:01:39,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:01:39,813 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 [2022-11-03 03:01:39,813 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] [2022-11-03 03:01:39,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-03 03:01:39,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-11-03 03:01:39,826 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) [2022-11-03 03:01:39,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 80 transitions. [2022-11-03 03:01:39,828 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 80 transitions. Word has length 48 [2022-11-03 03:01:39,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:01:39,829 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 80 transitions. [2022-11-03 03:01:39,829 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) [2022-11-03 03:01:39,829 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 80 transitions. [2022-11-03 03:01:39,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 03:01:39,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:01:39,837 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] [2022-11-03 03:01:39,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:01:40,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:01:40,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:01:40,238 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:01:40,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:01:40,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1967363502, now seen corresponding path program 1 times [2022-11-03 03:01:40,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:01:40,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1015407586] [2022-11-03 03:01:40,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:01:40,240 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:01:40,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:01:40,241 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:01:40,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 03:01:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:40,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:01:40,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:40,590 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:01:40,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:01:41,195 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:01:41,195 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:01:41,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1015407586] [2022-11-03 03:01:41,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1015407586] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:01:41,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1914160746] [2022-11-03 03:01:41,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:01:41,196 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:01:41,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:01:41,201 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:01:41,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-03 03:01:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:41,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:01:41,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:41,494 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 03:01:41,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:01:41,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1914160746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:01:41,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:01:41,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 10 [2022-11-03 03:01:41,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495333396] [2022-11-03 03:01:41,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:01:41,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:01:41,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:01:41,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:01:41,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:01:41,497 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) [2022-11-03 03:01:41,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:01:41,629 INFO L93 Difference]: Finished difference Result 68 states and 91 transitions. [2022-11-03 03:01:41,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:01:41,629 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 [2022-11-03 03:01:41,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:01:41,630 INFO L225 Difference]: With dead ends: 68 [2022-11-03 03:01:41,630 INFO L226 Difference]: Without dead ends: 58 [2022-11-03 03:01:41,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:01:41,631 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 1 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-11-03 03:01:41,632 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] [2022-11-03 03:01:41,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-03 03:01:41,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-11-03 03:01:41,643 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) [2022-11-03 03:01:41,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 79 transitions. [2022-11-03 03:01:41,644 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 79 transitions. Word has length 50 [2022-11-03 03:01:41,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:01:41,644 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 79 transitions. [2022-11-03 03:01:41,644 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) [2022-11-03 03:01:41,645 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 79 transitions. [2022-11-03 03:01:41,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 03:01:41,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:01:41,646 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] [2022-11-03 03:01:41,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:01:41,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:01:42,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:01:42,054 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:01:42,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:01:42,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1518257168, now seen corresponding path program 1 times [2022-11-03 03:01:42,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:01:42,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1710450530] [2022-11-03 03:01:42,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:01:42,055 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:01:42,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:01:42,057 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:01:42,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 03:01:42,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:42,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:01:42,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:42,399 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:01:42,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:01:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:01:42,982 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:01:42,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1710450530] [2022-11-03 03:01:42,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1710450530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:01:42,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1349550733] [2022-11-03 03:01:42,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:01:42,983 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:01:42,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:01:42,987 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:01:43,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-03 03:01:43,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:43,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:01:43,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:01:43,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:01:43,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1349550733] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:01:43,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:01:43,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 12 [2022-11-03 03:01:43,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944596093] [2022-11-03 03:01:43,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:01:43,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:01:43,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:01:43,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:01:43,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:01:43,523 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) [2022-11-03 03:01:43,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:01:43,783 INFO L93 Difference]: Finished difference Result 98 states and 133 transitions. [2022-11-03 03:01:43,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:01:43,784 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 [2022-11-03 03:01:43,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:01:43,788 INFO L225 Difference]: With dead ends: 98 [2022-11-03 03:01:43,788 INFO L226 Difference]: Without dead ends: 77 [2022-11-03 03:01:43,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:01:43,789 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:01:43,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 283 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:01:43,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-03 03:01:43,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2022-11-03 03:01:43,799 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) [2022-11-03 03:01:43,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2022-11-03 03:01:43,806 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 50 [2022-11-03 03:01:43,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:01:43,806 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2022-11-03 03:01:43,806 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) [2022-11-03 03:01:43,807 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2022-11-03 03:01:43,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 03:01:43,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:01:43,810 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] [2022-11-03 03:01:43,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:01:44,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:01:44,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:01:44,213 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:01:44,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:01:44,213 INFO L85 PathProgramCache]: Analyzing trace with hash 931451154, now seen corresponding path program 1 times [2022-11-03 03:01:44,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:01:44,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [444882105] [2022-11-03 03:01:44,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:01:44,214 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:01:44,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:01:44,215 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:01:44,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 03:01:44,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:44,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:01:44,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:44,550 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:01:44,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:01:45,145 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:01:45,145 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:01:45,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [444882105] [2022-11-03 03:01:45,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [444882105] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:01:45,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [125165963] [2022-11-03 03:01:45,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:01:45,146 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:01:45,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:01:45,149 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:01:45,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-03 03:01:45,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:45,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:01:45,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:01:45,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:01:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:01:46,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [125165963] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:01:46,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824457310] [2022-11-03 03:01:46,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:01:46,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:01:46,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:01:46,087 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:01:46,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 03:01:46,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:46,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:01:46,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:01:46,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:01:46,663 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:01:46,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824457310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:01:46,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:01:46,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 5, 5] total 12 [2022-11-03 03:01:46,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535163550] [2022-11-03 03:01:46,664 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:01:46,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 03:01:46,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:01:46,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 03:01:46,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:01:46,665 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) [2022-11-03 03:01:49,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:01:49,123 INFO L93 Difference]: Finished difference Result 186 states and 270 transitions. [2022-11-03 03:01:49,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 03:01:49,124 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 [2022-11-03 03:01:49,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:01:49,125 INFO L225 Difference]: With dead ends: 186 [2022-11-03 03:01:49,126 INFO L226 Difference]: Without dead ends: 127 [2022-11-03 03:01:49,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2022-11-03 03:01:49,127 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 91 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:01:49,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 374 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 03:01:49,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-03 03:01:49,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 96. [2022-11-03 03:01:49,144 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) [2022-11-03 03:01:49,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 137 transitions. [2022-11-03 03:01:49,151 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 137 transitions. Word has length 50 [2022-11-03 03:01:49,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:01:49,151 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 137 transitions. [2022-11-03 03:01:49,151 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) [2022-11-03 03:01:49,152 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 137 transitions. [2022-11-03 03:01:49,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 03:01:49,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:01:49,153 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] [2022-11-03 03:01:49,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:01:49,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:01:49,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:01:49,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:01:49,757 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:01:49,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:01:49,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1265138967, now seen corresponding path program 1 times [2022-11-03 03:01:49,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:01:49,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [671824665] [2022-11-03 03:01:49,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:01:49,758 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:01:49,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:01:49,759 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:01:49,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 03:01:49,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:49,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:01:49,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:50,104 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:01:50,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:01:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:01:50,764 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:01:50,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [671824665] [2022-11-03 03:01:50,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [671824665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:01:50,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [419611245] [2022-11-03 03:01:50,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:01:50,765 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:01:50,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:01:50,766 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:01:50,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-03 03:01:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:50,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:01:50,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:51,207 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 03:01:51,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:01:51,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [419611245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:01:51,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:01:51,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-03 03:01:51,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601045460] [2022-11-03 03:01:51,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:01:51,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:01:51,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:01:51,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:01:51,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:01:51,209 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) [2022-11-03 03:01:51,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:01:51,520 INFO L93 Difference]: Finished difference Result 119 states and 161 transitions. [2022-11-03 03:01:51,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:01:51,521 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 [2022-11-03 03:01:51,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:01:51,523 INFO L225 Difference]: With dead ends: 119 [2022-11-03 03:01:51,523 INFO L226 Difference]: Without dead ends: 113 [2022-11-03 03:01:51,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-03 03:01:51,525 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 22 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:01:51,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 229 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:01:51,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-03 03:01:51,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2022-11-03 03:01:51,537 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) [2022-11-03 03:01:51,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 153 transitions. [2022-11-03 03:01:51,539 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 153 transitions. Word has length 54 [2022-11-03 03:01:51,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:01:51,539 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 153 transitions. [2022-11-03 03:01:51,540 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) [2022-11-03 03:01:51,540 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 153 transitions. [2022-11-03 03:01:51,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 03:01:51,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:01:51,541 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] [2022-11-03 03:01:51,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:01:51,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:01:51,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:01:51,960 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:01:51,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:01:51,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1322397269, now seen corresponding path program 1 times [2022-11-03 03:01:51,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:01:51,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1863100885] [2022-11-03 03:01:51,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:01:51,961 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:01:51,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:01:51,962 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:01:51,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 03:01:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:52,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:01:52,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:52,366 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:01:52,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:01:53,033 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:01:53,034 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:01:53,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1863100885] [2022-11-03 03:01:53,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1863100885] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:01:53,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [917667619] [2022-11-03 03:01:53,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:01:53,034 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:01:53,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:01:53,035 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:01:53,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-03 03:01:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:53,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:01:53,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:01:53,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:01:53,678 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:01:53,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [917667619] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:01:53,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588333366] [2022-11-03 03:01:53,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:01:53,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:01:53,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:01:53,681 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:01:53,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 03:01:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:53,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:01:53,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:54,558 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:01:54,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:01:54,973 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 03:01:54,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588333366] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:01:54,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2022-11-03 03:01:54,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6, 6, 6, 8] total 17 [2022-11-03 03:01:54,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735566781] [2022-11-03 03:01:54,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:01:54,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:01:54,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:01:54,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:01:54,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:01:54,976 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) [2022-11-03 03:01:55,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:01:55,294 INFO L93 Difference]: Finished difference Result 117 states and 158 transitions. [2022-11-03 03:01:55,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:01:55,295 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 [2022-11-03 03:01:55,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:01:55,296 INFO L225 Difference]: With dead ends: 117 [2022-11-03 03:01:55,297 INFO L226 Difference]: Without dead ends: 100 [2022-11-03 03:01:55,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:01:55,298 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 [2022-11-03 03:01:55,298 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] [2022-11-03 03:01:55,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-03 03:01:55,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-11-03 03:01:55,309 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) [2022-11-03 03:01:55,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 135 transitions. [2022-11-03 03:01:55,311 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 135 transitions. Word has length 54 [2022-11-03 03:01:55,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:01:55,311 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 135 transitions. [2022-11-03 03:01:55,311 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) [2022-11-03 03:01:55,311 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 135 transitions. [2022-11-03 03:01:55,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 03:01:55,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:01:55,313 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] [2022-11-03 03:01:55,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2022-11-03 03:01:55,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 03:01:55,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-03 03:01:55,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:01:55,915 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:01:55,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:01:55,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1182884870, now seen corresponding path program 1 times [2022-11-03 03:01:55,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:01:55,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1094453760] [2022-11-03 03:01:55,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:01:55,917 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:01:55,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:01:55,918 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:01:55,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 03:01:55,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:55,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:01:55,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:56,236 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:01:56,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:01:56,858 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:01:56,858 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:01:56,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1094453760] [2022-11-03 03:01:56,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1094453760] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:01:56,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1748635637] [2022-11-03 03:01:56,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:01:56,859 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:01:56,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:01:56,860 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:01:56,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-03 03:01:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:56,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:01:56,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:57,091 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:01:57,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:01:57,450 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:01:57,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1748635637] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:01:57,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445776309] [2022-11-03 03:01:57,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:01:57,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:01:57,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:01:57,453 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:01:57,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-03 03:01:57,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:01:57,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:01:57,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:01:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:01:58,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:01:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:01:58,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445776309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:01:58,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:01:58,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 7, 7] total 15 [2022-11-03 03:01:58,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501960838] [2022-11-03 03:01:58,585 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:01:58,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 03:01:58,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:01:58,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 03:01:58,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-03 03:01:58,586 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) [2022-11-03 03:02:00,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:02:00,330 INFO L93 Difference]: Finished difference Result 224 states and 309 transitions. [2022-11-03 03:02:00,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 03:02:00,331 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 [2022-11-03 03:02:00,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:02:00,333 INFO L225 Difference]: With dead ends: 224 [2022-11-03 03:02:00,333 INFO L226 Difference]: Without dead ends: 132 [2022-11-03 03:02:00,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:02:00,334 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 174 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:02:00,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 294 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 03:02:00,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-03 03:02:00,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 104. [2022-11-03 03:02:00,346 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) [2022-11-03 03:02:00,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 142 transitions. [2022-11-03 03:02:00,348 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 142 transitions. Word has length 56 [2022-11-03 03:02:00,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:02:00,348 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 142 transitions. [2022-11-03 03:02:00,348 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) [2022-11-03 03:02:00,348 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 142 transitions. [2022-11-03 03:02:00,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 03:02:00,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:02:00,350 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] [2022-11-03 03:02:00,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-03 03:02:00,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-03 03:02:00,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 03:02:00,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:02:00,952 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:02:00,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:02:00,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1175617949, now seen corresponding path program 1 times [2022-11-03 03:02:00,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:02:00,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244687129] [2022-11-03 03:02:00,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:02:00,954 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:02:00,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:02:00,955 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:02:00,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 03:02:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:02:01,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:02:01,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:02:01,540 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:02:01,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:02:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:02:02,791 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:02:02,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244687129] [2022-11-03 03:02:02,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244687129] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:02:02,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [677689441] [2022-11-03 03:02:02,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:02:02,792 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:02:02,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:02:02,795 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:02:02,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-03 03:02:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:02:02,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:02:02,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:02:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:02:03,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:02:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:02:03,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [677689441] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:02:03,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490284333] [2022-11-03 03:02:03,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:02:03,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:02:03,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:02:03,717 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:02:03,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-03 03:02:03,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:02:03,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:02:03,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:02:04,293 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:02:04,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:02:05,766 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:02:05,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490284333] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:02:05,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:02:05,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2022-11-03 03:02:05,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491971994] [2022-11-03 03:02:05,767 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:02:05,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 03:02:05,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:02:05,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 03:02:05,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:02:05,769 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) [2022-11-03 03:02:10,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:02:10,001 INFO L93 Difference]: Finished difference Result 271 states and 386 transitions. [2022-11-03 03:02:10,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 03:02:10,002 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 [2022-11-03 03:02:10,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:02:10,004 INFO L225 Difference]: With dead ends: 271 [2022-11-03 03:02:10,004 INFO L226 Difference]: Without dead ends: 175 [2022-11-03 03:02:10,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=316, Invalid=554, Unknown=0, NotChecked=0, Total=870 [2022-11-03 03:02:10,006 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 233 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s 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, 2.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:02:10,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 615 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-03 03:02:10,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-03 03:02:10,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 118. [2022-11-03 03:02:10,033 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) [2022-11-03 03:02:10,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 165 transitions. [2022-11-03 03:02:10,034 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 165 transitions. Word has length 63 [2022-11-03 03:02:10,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:02:10,034 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 165 transitions. [2022-11-03 03:02:10,035 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) [2022-11-03 03:02:10,035 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 165 transitions. [2022-11-03 03:02:10,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 03:02:10,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:02:10,036 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] [2022-11-03 03:02:10,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2022-11-03 03:02:10,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-11-03 03:02:10,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 03:02:10,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:02:10,639 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:02:10,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:02:10,639 INFO L85 PathProgramCache]: Analyzing trace with hash 369916166, now seen corresponding path program 2 times [2022-11-03 03:02:10,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:02:10,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94913263] [2022-11-03 03:02:10,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:02:10,640 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:02:10,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:02:10,641 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:02:10,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 03:02:10,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:02:10,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:02:10,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:02:10,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:02:11,393 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:02:11,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:02:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:02:12,912 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:02:12,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94913263] [2022-11-03 03:02:12,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [94913263] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:02:12,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1332644177] [2022-11-03 03:02:12,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:02:12,913 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:02:12,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:02:12,914 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:02:12,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-03 03:02:13,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:02:13,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:02:13,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:02:13,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:02:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:02:13,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:02:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:02:14,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1332644177] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:02:14,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240299526] [2022-11-03 03:02:14,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:02:14,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:02:14,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:02:14,025 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:02:14,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-03 03:02:14,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:02:14,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:02:14,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:02:14,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:02:14,771 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:02:14,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:02:16,574 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:02:16,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240299526] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:02:16,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:02:16,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 27 [2022-11-03 03:02:16,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692705587] [2022-11-03 03:02:16,575 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:02:16,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 03:02:16,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:02:16,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 03:02:16,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=469, Unknown=0, NotChecked=0, Total=702 [2022-11-03 03:02:16,577 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) [2022-11-03 03:02:21,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:02:21,386 INFO L93 Difference]: Finished difference Result 294 states and 417 transitions. [2022-11-03 03:02:21,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 03:02:21,387 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 [2022-11-03 03:02:21,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:02:21,389 INFO L225 Difference]: With dead ends: 294 [2022-11-03 03:02:21,389 INFO L226 Difference]: Without dead ends: 184 [2022-11-03 03:02:21,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=581, Invalid=1059, Unknown=0, NotChecked=0, Total=1640 [2022-11-03 03:02:21,391 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 502 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:02:21,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 726 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-03 03:02:21,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-03 03:02:21,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 128. [2022-11-03 03:02:21,409 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) [2022-11-03 03:02:21,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 182 transitions. [2022-11-03 03:02:21,410 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 182 transitions. Word has length 68 [2022-11-03 03:02:21,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:02:21,410 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 182 transitions. [2022-11-03 03:02:21,411 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) [2022-11-03 03:02:21,411 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 182 transitions. [2022-11-03 03:02:21,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-03 03:02:21,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:02:21,412 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] [2022-11-03 03:02:21,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 03:02:21,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-11-03 03:02:21,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2022-11-03 03:02:22,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:02:22,025 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:02:22,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:02:22,026 INFO L85 PathProgramCache]: Analyzing trace with hash -542294301, now seen corresponding path program 2 times [2022-11-03 03:02:22,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:02:22,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814561733] [2022-11-03 03:02:22,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:02:22,026 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:02:22,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:02:22,027 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:02:22,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 03:02:22,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:02:22,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:02:22,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:02:22,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:02:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:02:23,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:02:26,750 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:02:26,750 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:02:26,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814561733] [2022-11-03 03:02:26,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814561733] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:02:26,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [778917690] [2022-11-03 03:02:26,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:02:26,751 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:02:26,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:02:26,752 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:02:26,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-03 03:02:26,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:02:26,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:02:26,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:02:26,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:02:27,276 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:02:27,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:02:28,314 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:02:28,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [778917690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:02:28,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506213984] [2022-11-03 03:02:28,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:02:28,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:02:28,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:02:28,316 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:02:28,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-03 03:02:28,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:02:28,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:02:28,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:02:28,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:02:29,289 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:02:29,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:02:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:02:33,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506213984] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:02:33,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:02:33,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 38 [2022-11-03 03:02:33,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150146974] [2022-11-03 03:02:33,917 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:02:33,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 03:02:33,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:02:33,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 03:02:33,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=959, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 03:02:33,919 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) [2022-11-03 03:02:49,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:02:49,044 INFO L93 Difference]: Finished difference Result 397 states and 586 transitions. [2022-11-03 03:02:49,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-03 03:02:49,050 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 [2022-11-03 03:02:49,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:02:49,051 INFO L225 Difference]: With dead ends: 397 [2022-11-03 03:02:49,051 INFO L226 Difference]: Without dead ends: 277 [2022-11-03 03:02:49,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=1210, Invalid=2330, Unknown=0, NotChecked=0, Total=3540 [2022-11-03 03:02:49,053 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 837 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s 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, 8.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:02:49,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [837 Valid, 1746 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-11-03 03:02:49,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-11-03 03:02:49,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 154. [2022-11-03 03:02:49,078 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) [2022-11-03 03:02:49,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 225 transitions. [2022-11-03 03:02:49,079 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 225 transitions. Word has length 81 [2022-11-03 03:02:49,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:02:49,080 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 225 transitions. [2022-11-03 03:02:49,080 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) [2022-11-03 03:02:49,080 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 225 transitions. [2022-11-03 03:02:49,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 03:02:49,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:02:49,082 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] [2022-11-03 03:02:49,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-03 03:02:49,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2022-11-03 03:02:49,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-03 03:02:49,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:02:49,697 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:02:49,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:02:49,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1098654470, now seen corresponding path program 3 times [2022-11-03 03:02:49,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:02:49,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [505116159] [2022-11-03 03:02:49,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:02:49,698 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:02:49,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:02:49,699 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:02:49,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 03:02:49,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-11-03 03:02:49,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:02:49,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 03:02:49,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:02:55,057 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:02:55,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:03:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:03:05,297 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:03:05,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [505116159] [2022-11-03 03:03:05,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [505116159] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:03:05,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [591776997] [2022-11-03 03:03:05,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:03:05,298 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:03:05,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:03:05,299 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:03:05,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-03 03:03:05,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-11-03 03:03:05,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:03:05,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 03:03:05,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:03:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:03:22,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:03:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:03:26,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [591776997] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:03:26,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107880810] [2022-11-03 03:03:26,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:03:26,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:03:26,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:03:26,222 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:03:26,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-03 03:03:26,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-11-03 03:03:26,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:03:26,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:03:26,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:03:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 26 proven. 273 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:03:35,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:03:47,870 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 4 proven. 283 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:03:47,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107880810] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:03:47,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:03:47,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 25, 25, 19, 19] total 90 [2022-11-03 03:03:47,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752510159] [2022-11-03 03:03:47,871 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:03:47,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-11-03 03:03:47,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:03:47,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-11-03 03:03:47,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=7224, Unknown=6, NotChecked=0, Total=8010 [2022-11-03 03:03:47,875 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) [2022-11-03 03:05:54,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:05:54,458 INFO L93 Difference]: Finished difference Result 526 states and 848 transitions. [2022-11-03 03:05:54,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-11-03 03:05:54,459 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 [2022-11-03 03:05:54,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:05:54,463 INFO L225 Difference]: With dead ends: 526 [2022-11-03 03:05:54,463 INFO L226 Difference]: Without dead ends: 374 [2022-11-03 03:05:54,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 482 SyntacticMatches, 21 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11939 ImplicationChecksByTransitivity, 140.6s TimeCoverageRelationStatistics Valid=5943, Invalid=32663, Unknown=6, NotChecked=0, Total=38612 [2022-11-03 03:05:54,486 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 2516 mSDsluCounter, 3689 mSDsCounter, 0 mSdLazyCounter, 5712 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2550 SdHoareTripleChecker+Valid, 3770 SdHoareTripleChecker+Invalid, 9242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 5712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3322 IncrementalHoareTripleChecker+Unchecked, 33.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:05:54,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2550 Valid, 3770 Invalid, 9242 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [208 Valid, 5712 Invalid, 0 Unknown, 3322 Unchecked, 33.4s Time] [2022-11-03 03:05:54,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-11-03 03:05:54,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 190. [2022-11-03 03:05:54,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 173 states have (on average 1.4450867052023122) internal successors, (250), 177 states have internal predecessors, (250), 8 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (37), 9 states have call predecessors, (37), 7 states have call successors, (37) [2022-11-03 03:05:54,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 295 transitions. [2022-11-03 03:05:54,553 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 295 transitions. Word has length 92 [2022-11-03 03:05:54,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:05:54,554 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 295 transitions. [2022-11-03 03:05:54,555 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) [2022-11-03 03:05:54,555 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 295 transitions. [2022-11-03 03:05:54,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-03 03:05:54,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:05:54,565 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] [2022-11-03 03:05:54,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-03 03:05:54,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-03 03:05:54,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-11-03 03:05:55,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:05:55,169 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:05:55,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:05:55,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1995923427, now seen corresponding path program 3 times [2022-11-03 03:05:55,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:05:55,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2081989855] [2022-11-03 03:05:55,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:05:55,170 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:05:55,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:05:55,172 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:05:55,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 03:05:55,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-11-03 03:05:55,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:05:55,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 03:05:55,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:06:01,081 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:06:01,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:06:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:06:16,731 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:06:16,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2081989855] [2022-11-03 03:06:16,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2081989855] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:06:16,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [207559940] [2022-11-03 03:06:16,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:06:16,732 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:06:16,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:06:16,733 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:06:16,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-03 03:06:17,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-11-03 03:06:17,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:06:17,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 03:06:17,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:06:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:06:19,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:06:23,374 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:06:23,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [207559940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:06:23,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892441892] [2022-11-03 03:06:23,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:06:23,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:06:23,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:06:23,376 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:06:23,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c286f190-bc6c-4d49-b8c1-2e51aa8a3114/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-03 03:06:23,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-11-03 03:06:23,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:06:23,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 03:06:23,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:06:25,021 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:06:25,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:06:28,938 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:06:28,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892441892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:06:28,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:06:28,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 26, 26, 26] total 54 [2022-11-03 03:06:28,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750677602] [2022-11-03 03:06:28,939 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:06:28,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-03 03:06:28,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:06:28,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-03 03:06:28,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=777, Invalid=2085, Unknown=0, NotChecked=0, Total=2862 [2022-11-03 03:06:28,943 INFO L87 Difference]: Start difference. First operand 190 states and 295 transitions. Second operand has 54 states, 54 states have (on average 3.6296296296296298) internal successors, (196), 54 states have internal predecessors, (196), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)