./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW --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 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b --- 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-4e7fbc6 [2022-11-23 14:26:56,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:26:56,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:26:56,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:26:56,306 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:26:56,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:26:56,309 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:26:56,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:26:56,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:26:56,314 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:26:56,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:26:56,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:26:56,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:26:56,318 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:26:56,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:26:56,321 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:26:56,322 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:26:56,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:26:56,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:26:56,328 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:26:56,329 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:26:56,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:26:56,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:26:56,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:26:56,341 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:26:56,341 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:26:56,341 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:26:56,343 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:26:56,343 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:26:56,344 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:26:56,345 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:26:56,345 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:26:56,355 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:26:56,356 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:26:56,357 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:26:56,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:26:56,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:26:56,359 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:26:56,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:26:56,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:26:56,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:26:56,362 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:26:56,386 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:26:56,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:26:56,387 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:26:56,387 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:26:56,388 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:26:56,388 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:26:56,388 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:26:56,389 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:26:56,389 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:26:56,389 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:26:56,389 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:26:56,390 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:26:56,390 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:26:56,390 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:26:56,390 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:26:56,391 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:26:56,391 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:26:56,391 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:26:56,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:26:56,392 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:26:56,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:26:56,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:26:56,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:26:56,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:26:56,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:26:56,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:26:56,394 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:26:56,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:26:56,394 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:26:56,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:26:56,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:26:56,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:26:56,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:26:56,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:26:56,396 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:26:56,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:26:56,396 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:26:56,397 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:26:56,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:26:56,397 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:26:56,397 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:26:56,398 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_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b [2022-11-23 14:26:56,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:26:56,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:26:56,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:26:56,756 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:26:56,757 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:26:56,758 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2022-11-23 14:26:59,836 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:27:00,092 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:27:00,092 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2022-11-23 14:27:00,104 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/data/69d6da17e/7708c59f58e64944a6c0ced9e8b47e85/FLAG20eed145c [2022-11-23 14:27:00,124 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/data/69d6da17e/7708c59f58e64944a6c0ced9e8b47e85 [2022-11-23 14:27:00,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:27:00,132 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:27:00,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:27:00,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:27:00,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:27:00,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:27:00" (1/1) ... [2022-11-23 14:27:00,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bcefa38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:00, skipping insertion in model container [2022-11-23 14:27:00,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:27:00" (1/1) ... [2022-11-23 14:27:00,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:27:00,195 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:27:00,381 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2022-11-23 14:27:00,430 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:27:00,450 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:27:00,463 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2022-11-23 14:27:00,496 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:27:00,510 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:27:00,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:00 WrapperNode [2022-11-23 14:27:00,511 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:27:00,512 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:27:00,512 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:27:00,512 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:27:00,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:00" (1/1) ... [2022-11-23 14:27:00,529 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:00" (1/1) ... [2022-11-23 14:27:00,547 INFO L138 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2022-11-23 14:27:00,548 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:27:00,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:27:00,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:27:00,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:27:00,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:00" (1/1) ... [2022-11-23 14:27:00,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:00" (1/1) ... [2022-11-23 14:27:00,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:00" (1/1) ... [2022-11-23 14:27:00,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:00" (1/1) ... [2022-11-23 14:27:00,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:00" (1/1) ... [2022-11-23 14:27:00,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:00" (1/1) ... [2022-11-23 14:27:00,576 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:00" (1/1) ... [2022-11-23 14:27:00,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:00" (1/1) ... [2022-11-23 14:27:00,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:27:00,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:27:00,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:27:00,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:27:00,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:00" (1/1) ... [2022-11-23 14:27:00,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:27:00,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:27:00,620 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:27:00,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:27:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:27:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:27:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-11-23 14:27:00,679 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-11-23 14:27:00,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:27:00,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:27:00,679 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2022-11-23 14:27:00,679 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2022-11-23 14:27:00,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 14:27:00,679 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 14:27:00,760 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:27:00,762 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:27:01,155 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:27:01,518 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:27:01,518 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 14:27:01,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:27:01 BoogieIcfgContainer [2022-11-23 14:27:01,522 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:27:01,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:27:01,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:27:01,533 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:27:01,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:27:00" (1/3) ... [2022-11-23 14:27:01,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23a5dc34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:27:01, skipping insertion in model container [2022-11-23 14:27:01,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:00" (2/3) ... [2022-11-23 14:27:01,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23a5dc34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:27:01, skipping insertion in model container [2022-11-23 14:27:01,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:27:01" (3/3) ... [2022-11-23 14:27:01,542 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2022-11-23 14:27:01,564 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:27:01,565 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:27:01,637 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:27:01,645 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;@3119e08, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:27:01,646 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:27:01,652 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 31 states have internal predecessors, (44), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 14:27:01,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-23 14:27:01,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:27:01,661 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:27:01,662 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:27:01,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:27:01,668 INFO L85 PathProgramCache]: Analyzing trace with hash 911912301, now seen corresponding path program 1 times [2022-11-23 14:27:01,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:27:01,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985365270] [2022-11-23 14:27:01,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:01,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:27:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:02,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:27:02,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:27:02,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985365270] [2022-11-23 14:27:02,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985365270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:27:02,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:27:02,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-23 14:27:02,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555531073] [2022-11-23 14:27:02,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:27:02,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 14:27:02,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:27:02,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 14:27:02,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:27:02,629 INFO L87 Difference]: Start difference. First operand has 43 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 31 states have internal predecessors, (44), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 10 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 14:27:02,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:27:02,923 INFO L93 Difference]: Finished difference Result 108 states and 164 transitions. [2022-11-23 14:27:02,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 14:27:02,927 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-11-23 14:27:02,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:27:02,944 INFO L225 Difference]: With dead ends: 108 [2022-11-23 14:27:02,945 INFO L226 Difference]: Without dead ends: 61 [2022-11-23 14:27:02,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:27:02,957 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 17 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:27:02,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 322 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:27:02,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-23 14:27:02,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2022-11-23 14:27:03,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 38 states have internal predecessors, (47), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-11-23 14:27:03,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2022-11-23 14:27:03,004 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 26 [2022-11-23 14:27:03,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:27:03,005 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2022-11-23 14:27:03,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 14:27:03,006 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2022-11-23 14:27:03,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 14:27:03,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:27:03,008 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:27:03,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:27:03,009 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:27:03,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:27:03,010 INFO L85 PathProgramCache]: Analyzing trace with hash -607868578, now seen corresponding path program 1 times [2022-11-23 14:27:03,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:27:03,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228585946] [2022-11-23 14:27:03,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:03,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:27:03,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:27:03,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:27:03,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228585946] [2022-11-23 14:27:03,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228585946] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:27:03,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233123143] [2022-11-23 14:27:03,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:03,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:27:03,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:27:03,747 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:27:03,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:27:03,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:03,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 14:27:03,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:04,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:27:04,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:27:04,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:27:04,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233123143] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:27:04,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [633547114] [2022-11-23 14:27:04,491 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-23 14:27:04,492 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:27:04,496 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:27:04,502 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:27:04,503 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:27:04,820 INFO L197 IcfgInterpreter]: Interpreting procedure addflt with input of size 36 for LOIs [2022-11-23 14:27:05,232 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 78 for LOIs [2022-11-23 14:27:05,318 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 60 for LOIs [2022-11-23 14:27:05,582 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:27:10,112 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '477#(and (= (select |#length| 3) 12) (= (select |#length| 2) 24) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:27:10,112 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:27:10,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:27:10,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 15 [2022-11-23 14:27:10,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311887031] [2022-11-23 14:27:10,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:27:10,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 14:27:10,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:27:10,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 14:27:10,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-11-23 14:27:10,117 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-23 14:27:10,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:27:10,576 INFO L93 Difference]: Finished difference Result 134 states and 185 transitions. [2022-11-23 14:27:10,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 14:27:10,577 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2022-11-23 14:27:10,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:27:10,579 INFO L225 Difference]: With dead ends: 134 [2022-11-23 14:27:10,579 INFO L226 Difference]: Without dead ends: 83 [2022-11-23 14:27:10,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2022-11-23 14:27:10,581 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 32 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:27:10,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 382 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:27:10,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-23 14:27:10,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2022-11-23 14:27:10,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 48 states have internal predecessors, (57), 12 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2022-11-23 14:27:10,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2022-11-23 14:27:10,617 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 30 [2022-11-23 14:27:10,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:27:10,618 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2022-11-23 14:27:10,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-23 14:27:10,618 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2022-11-23 14:27:10,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 14:27:10,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:27:10,621 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:27:10,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:27:10,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:27:10,827 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:27:10,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:27:10,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1773969378, now seen corresponding path program 2 times [2022-11-23 14:27:10,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:27:10,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641069394] [2022-11-23 14:27:10,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:10,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:27:10,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:27:11,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:27:11,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641069394] [2022-11-23 14:27:11,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641069394] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:27:11,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:27:11,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 14:27:11,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193578410] [2022-11-23 14:27:11,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:27:11,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:27:11,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:27:11,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:27:11,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:27:11,117 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:27:11,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:27:11,262 INFO L93 Difference]: Finished difference Result 98 states and 125 transitions. [2022-11-23 14:27:11,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:27:11,262 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2022-11-23 14:27:11,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:27:11,267 INFO L225 Difference]: With dead ends: 98 [2022-11-23 14:27:11,268 INFO L226 Difference]: Without dead ends: 77 [2022-11-23 14:27:11,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:27:11,272 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:27:11,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 296 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:27:11,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-23 14:27:11,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2022-11-23 14:27:11,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 48 states have internal predecessors, (57), 12 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2022-11-23 14:27:11,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2022-11-23 14:27:11,289 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 30 [2022-11-23 14:27:11,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:27:11,289 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2022-11-23 14:27:11,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:27:11,290 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2022-11-23 14:27:11,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 14:27:11,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:27:11,297 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:27:11,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:27:11,298 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:27:11,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:27:11,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1554793101, now seen corresponding path program 1 times [2022-11-23 14:27:11,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:27:11,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784148511] [2022-11-23 14:27:11,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:11,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:27:11,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:11,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:27:11,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:27:11,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784148511] [2022-11-23 14:27:11,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784148511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:27:11,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:27:11,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-23 14:27:11,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805890438] [2022-11-23 14:27:11,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:27:11,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 14:27:11,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:27:11,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 14:27:11,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:27:11,939 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 20 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-23 14:27:12,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:27:12,304 INFO L93 Difference]: Finished difference Result 83 states and 105 transitions. [2022-11-23 14:27:12,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 14:27:12,305 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 35 [2022-11-23 14:27:12,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:27:12,306 INFO L225 Difference]: With dead ends: 83 [2022-11-23 14:27:12,306 INFO L226 Difference]: Without dead ends: 63 [2022-11-23 14:27:12,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-11-23 14:27:12,308 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 39 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:27:12,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 517 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:27:12,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-23 14:27:12,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2022-11-23 14:27:12,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 40 states have internal predecessors, (49), 10 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2022-11-23 14:27:12,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2022-11-23 14:27:12,317 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 35 [2022-11-23 14:27:12,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:27:12,317 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2022-11-23 14:27:12,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-23 14:27:12,318 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2022-11-23 14:27:12,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-23 14:27:12,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:27:12,319 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:27:12,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:27:12,320 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:27:12,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:27:12,320 INFO L85 PathProgramCache]: Analyzing trace with hash -574448753, now seen corresponding path program 3 times [2022-11-23 14:27:12,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:27:12,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231329474] [2022-11-23 14:27:12,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:12,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:27:12,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:27:12,383 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 14:27:12,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:27:12,521 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 14:27:12,521 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 14:27:12,525 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-23 14:27:12,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:27:12,531 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2022-11-23 14:27:12,535 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 14:27:12,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:27:12 BoogieIcfgContainer [2022-11-23 14:27:12,601 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 14:27:12,602 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 14:27:12,602 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 14:27:12,602 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 14:27:12,603 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:27:01" (3/4) ... [2022-11-23 14:27:12,606 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-23 14:27:12,606 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 14:27:12,607 INFO L158 Benchmark]: Toolchain (without parser) took 12475.16ms. Allocated memory was 138.4MB in the beginning and 220.2MB in the end (delta: 81.8MB). Free memory was 74.0MB in the beginning and 73.8MB in the end (delta: 233.7kB). Peak memory consumption was 84.2MB. Max. memory is 16.1GB. [2022-11-23 14:27:12,608 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 138.4MB. Free memory was 106.9MB in the beginning and 106.9MB in the end (delta: 76.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:27:12,612 INFO L158 Benchmark]: CACSL2BoogieTranslator took 375.76ms. Allocated memory was 138.4MB in the beginning and 178.3MB in the end (delta: 39.8MB). Free memory was 73.8MB in the beginning and 142.4MB in the end (delta: -68.6MB). Peak memory consumption was 11.8MB. Max. memory is 16.1GB. [2022-11-23 14:27:12,612 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.00ms. Allocated memory is still 178.3MB. Free memory was 142.4MB in the beginning and 141.1MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:27:12,613 INFO L158 Benchmark]: Boogie Preprocessor took 32.03ms. Allocated memory is still 178.3MB. Free memory was 141.0MB in the beginning and 139.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 14:27:12,613 INFO L158 Benchmark]: RCFGBuilder took 941.18ms. Allocated memory is still 178.3MB. Free memory was 139.0MB in the beginning and 98.4MB in the end (delta: 40.6MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. [2022-11-23 14:27:12,615 INFO L158 Benchmark]: TraceAbstraction took 11072.23ms. Allocated memory was 178.3MB in the beginning and 220.2MB in the end (delta: 41.9MB). Free memory was 97.7MB in the beginning and 73.8MB in the end (delta: 23.9MB). Peak memory consumption was 66.1MB. Max. memory is 16.1GB. [2022-11-23 14:27:12,616 INFO L158 Benchmark]: Witness Printer took 4.69ms. Allocated memory is still 220.2MB. Free memory is still 73.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:27:12,620 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 138.4MB. Free memory was 106.9MB in the beginning and 106.9MB in the end (delta: 76.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 375.76ms. Allocated memory was 138.4MB in the beginning and 178.3MB in the end (delta: 39.8MB). Free memory was 73.8MB in the beginning and 142.4MB in the end (delta: -68.6MB). Peak memory consumption was 11.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.00ms. Allocated memory is still 178.3MB. Free memory was 142.4MB in the beginning and 141.1MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 32.03ms. Allocated memory is still 178.3MB. Free memory was 141.0MB in the beginning and 139.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 941.18ms. Allocated memory is still 178.3MB. Free memory was 139.0MB in the beginning and 98.4MB in the end (delta: 40.6MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. * TraceAbstraction took 11072.23ms. Allocated memory was 178.3MB in the beginning and 220.2MB in the end (delta: 41.9MB). Free memory was 97.7MB in the beginning and 73.8MB in the end (delta: 23.9MB). Peak memory consumption was 66.1MB. Max. memory is 16.1GB. * Witness Printer took 4.69ms. Allocated memory is still 220.2MB. Free memory is still 73.8MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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: 18]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 111, overapproximation of bitwiseAnd at line 109, overapproximation of bitwiseComplement at line 77. Possible FailurePath: [L227] unsigned int a ; [L228] unsigned int ma = __VERIFIER_nondet_uint(); [L229] signed char ea = __VERIFIER_nondet_char(); [L230] unsigned int b ; [L231] unsigned int mb = __VERIFIER_nondet_uint(); [L232] signed char eb = __VERIFIER_nondet_char(); [L233] unsigned int r_add1 ; [L234] unsigned int r_add2 ; [L235] unsigned int zero ; [L236] int tmp ; [L237] int tmp___0 ; [L238] int __retres14 ; VAL [ea=-126, eb=127] [L242] CALL, EXPR base2flt(0, 0) VAL [unknown-#in~e-unknown=0, unknown-#in~m-unknown=0] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [e=0, m=0, unknown-#in~e-unknown=0, unknown-#in~m-unknown=0] [L30] COND TRUE ! m [L31] __retres4 = 0U VAL [__retres4=0, e=0, m=0, unknown-#in~e-unknown=0, unknown-#in~m-unknown=0] [L81] return (__retres4); [L242] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=-126, eb=127] [L242] zero = base2flt(0, 0) [L243] CALL, EXPR base2flt(ma, ea) VAL [unknown-#in~e-unknown=-126, unknown-#in~m-unknown=-4278190080] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [e=-126, m=16777216, unknown-#in~e-unknown=-126, unknown-#in~m-unknown=-4278190080] [L30] COND FALSE !(! m) VAL [e=-126, m=16777216, unknown-#in~e-unknown=-126, unknown-#in~m-unknown=-4278190080] [L36] COND FALSE !(m < 1U << 24U) VAL [e=-126, m=16777216, unknown-#in~e-unknown=-126, unknown-#in~m-unknown=-4278190080] [L58] COND TRUE 1 VAL [e=-126, m=16777216, unknown-#in~e-unknown=-126, unknown-#in~m-unknown=-4278190080] [L60] COND FALSE !(m >= 1U << 25U) VAL [e=-126, m=16777216, unknown-#in~e-unknown=-126, unknown-#in~m-unknown=-4278190080] [L77] m = m & ~ (1U << 24U) [L78] res = m | ((unsigned int )(e + 128) << 24U) [L79] __retres4 = res VAL [__retres4=33554432, e=-126, m=0, res=33554432, unknown-#in~e-unknown=-126, unknown-#in~m-unknown=-4278190080] [L81] return (__retres4); [L243] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=33554432, ea=-126, eb=127, ma=16777216, zero=0] [L243] a = base2flt(ma, ea) [L244] CALL, EXPR base2flt(mb, eb) VAL [unknown-#in~e-unknown=127, unknown-#in~m-unknown=33554431] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [e=127, m=33554431, unknown-#in~e-unknown=127, unknown-#in~m-unknown=33554431] [L30] COND FALSE !(! m) VAL [e=127, m=33554431, unknown-#in~e-unknown=127, unknown-#in~m-unknown=33554431] [L36] COND FALSE !(m < 1U << 24U) VAL [e=127, m=33554431, unknown-#in~e-unknown=127, unknown-#in~m-unknown=33554431] [L58] COND TRUE 1 VAL [e=127, m=33554431, unknown-#in~e-unknown=127, unknown-#in~m-unknown=33554431] [L60] COND FALSE !(m >= 1U << 25U) VAL [e=127, m=33554431, unknown-#in~e-unknown=127, unknown-#in~m-unknown=33554431] [L77] m = m & ~ (1U << 24U) [L78] res = m | ((unsigned int )(e + 128) << 24U) [L79] __retres4 = res VAL [__retres4=16777214, e=127, m=33554430, res=16777214, unknown-#in~e-unknown=127, unknown-#in~m-unknown=33554431] [L81] return (__retres4); [L244] RET, EXPR base2flt(mb, eb) VAL [a=33554432, base2flt(mb, eb)=4311744510, ea=-126, eb=127, ma=16777216, mb=33554431, zero=0] [L244] b = base2flt(mb, eb) [L245] CALL addflt(a, b) VAL [unknown-#in~a-unknown=33554432, unknown-#in~b-unknown=4311744510] [L85] unsigned int res ; [L86] unsigned int ma ; [L87] unsigned int mb ; [L88] unsigned int delta ; [L89] int ea ; [L90] int eb ; [L91] unsigned int tmp ; [L92] unsigned int __retres10 ; [L95] COND FALSE !(a < b) VAL [a=33554432, b=16777214, tmp=33554432, unknown-#in~a-unknown=33554432, unknown-#in~b-unknown=4311744510] [L102] COND FALSE !(! b) [L109] ma = a & ((1U << 24U) - 1U) [L110] ea = (int )(a >> 24U) - 128 [L111] ma = ma | (1U << 24U) [L112] mb = b & ((1U << 24U) - 1U) [L113] eb = (int )(b >> 24U) - 128 [L114] mb = mb | (1U << 24U) VAL [a=33554432, b=16777214, ea=-126, eb=128, ma=16777216, mb=16777216, tmp=33554432, unknown-#in~a-unknown=33554432, unknown-#in~b-unknown=4311744510] [L115] CALL __VERIFIER_assert(ea >= eb) VAL [unknown-#in~cond-unknown=0] [L17] COND TRUE !(cond) VAL [cond=0, unknown-#in~cond-unknown=0] [L18] reach_error() VAL [cond=0, unknown-#in~cond-unknown=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10.9s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 118 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 96 mSDsluCounter, 1517 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1339 mSDsCounter, 26 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 932 IncrementalHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 26 mSolverCounterUnsat, 178 mSDtfsCounter, 932 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 159 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 5.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=2, InterpolantAutomatonStates: 52, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 42 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 185 NumberOfCodeBlocks, 185 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 175 ConstructedInterpolants, 0 QuantifiedInterpolants, 410 SizeOfPredicates, 8 NumberOfNonLiveVariables, 118 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 64/76 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 [2022-11-23 14:27:12,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW --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 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b --- 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-4e7fbc6 [2022-11-23 14:27:15,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:27:15,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:27:15,411 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:27:15,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:27:15,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:27:15,421 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:27:15,424 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:27:15,426 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:27:15,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:27:15,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:27:15,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:27:15,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:27:15,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:27:15,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:27:15,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:27:15,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:27:15,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:27:15,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:27:15,459 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:27:15,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:27:15,465 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:27:15,467 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:27:15,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:27:15,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:27:15,478 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:27:15,478 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:27:15,481 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:27:15,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:27:15,483 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:27:15,484 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:27:15,485 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:27:15,487 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:27:15,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:27:15,497 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:27:15,497 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:27:15,498 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:27:15,498 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:27:15,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:27:15,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:27:15,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:27:15,502 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-23 14:27:15,546 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:27:15,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:27:15,547 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:27:15,547 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:27:15,548 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:27:15,548 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:27:15,548 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:27:15,548 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:27:15,549 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:27:15,549 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:27:15,549 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:27:15,549 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:27:15,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:27:15,551 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:27:15,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:27:15,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:27:15,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:27:15,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:27:15,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:27:15,552 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 14:27:15,552 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-23 14:27:15,553 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-23 14:27:15,553 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:27:15,553 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:27:15,554 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:27:15,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:27:15,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:27:15,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 14:27:15,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:27:15,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:27:15,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:27:15,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:27:15,556 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:27:15,556 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-23 14:27:15,556 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-23 14:27:15,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:27:15,557 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:27:15,557 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 14:27:15,557 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b [2022-11-23 14:27:15,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:27:15,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:27:16,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:27:16,002 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:27:16,003 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:27:16,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2022-11-23 14:27:19,328 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:27:19,577 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:27:19,578 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2022-11-23 14:27:19,594 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/data/eb0d044c2/8cac456ee699473bb25829c96bfebaa4/FLAG49a6974a2 [2022-11-23 14:27:19,629 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/data/eb0d044c2/8cac456ee699473bb25829c96bfebaa4 [2022-11-23 14:27:19,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:27:19,637 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:27:19,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:27:19,643 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:27:19,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:27:19,648 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:27:19" (1/1) ... [2022-11-23 14:27:19,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@addfe41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:19, skipping insertion in model container [2022-11-23 14:27:19,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:27:19" (1/1) ... [2022-11-23 14:27:19,659 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:27:19,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:27:19,913 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2022-11-23 14:27:19,997 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:27:20,016 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:27:20,032 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2022-11-23 14:27:20,076 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:27:20,112 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:27:20,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:20 WrapperNode [2022-11-23 14:27:20,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:27:20,114 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:27:20,115 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:27:20,115 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:27:20,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:20" (1/1) ... [2022-11-23 14:27:20,147 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:20" (1/1) ... [2022-11-23 14:27:20,184 INFO L138 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2022-11-23 14:27:20,186 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:27:20,187 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:27:20,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:27:20,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:27:20,198 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:20" (1/1) ... [2022-11-23 14:27:20,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:20" (1/1) ... [2022-11-23 14:27:20,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:20" (1/1) ... [2022-11-23 14:27:20,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:20" (1/1) ... [2022-11-23 14:27:20,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:20" (1/1) ... [2022-11-23 14:27:20,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:20" (1/1) ... [2022-11-23 14:27:20,243 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:20" (1/1) ... [2022-11-23 14:27:20,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:20" (1/1) ... [2022-11-23 14:27:20,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:27:20,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:27:20,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:27:20,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:27:20,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:20" (1/1) ... [2022-11-23 14:27:20,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:27:20,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:27:20,288 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:27:20,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:27:20,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:27:20,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-23 14:27:20,338 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-11-23 14:27:20,338 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-11-23 14:27:20,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:27:20,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:27:20,339 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2022-11-23 14:27:20,339 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2022-11-23 14:27:20,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 14:27:20,339 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 14:27:20,423 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:27:20,425 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:27:20,713 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:27:20,720 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:27:20,734 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 14:27:20,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:27:20 BoogieIcfgContainer [2022-11-23 14:27:20,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:27:20,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:27:20,739 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:27:20,742 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:27:20,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:27:19" (1/3) ... [2022-11-23 14:27:20,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d69c33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:27:20, skipping insertion in model container [2022-11-23 14:27:20,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:20" (2/3) ... [2022-11-23 14:27:20,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d69c33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:27:20, skipping insertion in model container [2022-11-23 14:27:20,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:27:20" (3/3) ... [2022-11-23 14:27:20,745 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2022-11-23 14:27:20,785 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:27:20,786 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:27:20,868 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:27:20,877 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;@20d1235b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:27:20,877 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:27:20,882 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 14:27:20,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-23 14:27:20,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:27:20,896 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:27:20,896 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:27:20,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:27:20,904 INFO L85 PathProgramCache]: Analyzing trace with hash -2030319843, now seen corresponding path program 1 times [2022-11-23 14:27:20,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:27:20,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648169324] [2022-11-23 14:27:20,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:20,920 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:27:20,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:27:20,931 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:27:20,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-23 14:27:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:21,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:27:21,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:27:21,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:27:21,267 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:27:21,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648169324] [2022-11-23 14:27:21,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1648169324] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:27:21,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:27:21,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 14:27:21,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622705487] [2022-11-23 14:27:21,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:27:21,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:27:21,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:27:21,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:27:21,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:27:21,311 INFO L87 Difference]: Start difference. First operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:27:21,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:27:21,561 INFO L93 Difference]: Finished difference Result 130 states and 195 transitions. [2022-11-23 14:27:21,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:27:21,565 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2022-11-23 14:27:21,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:27:21,576 INFO L225 Difference]: With dead ends: 130 [2022-11-23 14:27:21,576 INFO L226 Difference]: Without dead ends: 71 [2022-11-23 14:27:21,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:27:21,587 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 23 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:27:21,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 452 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:27:21,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-23 14:27:21,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2022-11-23 14:27:21,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 48 states have internal predecessors, (60), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-23 14:27:21,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2022-11-23 14:27:21,657 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 31 [2022-11-23 14:27:21,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:27:21,659 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2022-11-23 14:27:21,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:27:21,660 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2022-11-23 14:27:21,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 14:27:21,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:27:21,664 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-23 14:27:21,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:27:21,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:27:21,878 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:27:21,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:27:21,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1468368814, now seen corresponding path program 1 times [2022-11-23 14:27:21,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:27:21,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [370380854] [2022-11-23 14:27:21,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:21,880 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:27:21,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:27:21,881 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:27:21,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-23 14:27:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:21,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:27:21,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:22,125 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:27:22,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:27:22,221 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:27:22,221 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:27:22,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [370380854] [2022-11-23 14:27:22,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [370380854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:27:22,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1279694840] [2022-11-23 14:27:22,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:22,228 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:27:22,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:27:22,261 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:27:22,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2022-11-23 14:27:22,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:22,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:27:22,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:22,407 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:27:22,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:27:22,483 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:27:22,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1279694840] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:27:22,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884465207] [2022-11-23 14:27:22,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:22,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:27:22,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:27:22,490 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:27:22,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:27:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:22,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:27:22,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:27:22,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:27:22,650 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:27:22,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884465207] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:27:22,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:27:22,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 9 [2022-11-23 14:27:22,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497302678] [2022-11-23 14:27:22,652 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:27:22,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 14:27:22,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:27:22,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 14:27:22,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:27:22,655 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 14:27:22,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:27:22,856 INFO L93 Difference]: Finished difference Result 121 states and 159 transitions. [2022-11-23 14:27:22,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 14:27:22,856 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-11-23 14:27:22,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:27:22,860 INFO L225 Difference]: With dead ends: 121 [2022-11-23 14:27:22,860 INFO L226 Difference]: Without dead ends: 93 [2022-11-23 14:27:22,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:27:22,864 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 27 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:27:22,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 484 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:27:22,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-23 14:27:22,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2022-11-23 14:27:22,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 55 states have internal predecessors, (68), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-11-23 14:27:22,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2022-11-23 14:27:22,896 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 35 [2022-11-23 14:27:22,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:27:22,897 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2022-11-23 14:27:22,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 14:27:22,898 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2022-11-23 14:27:22,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-23 14:27:22,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:27:22,905 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-23 14:27:22,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-23 14:27:23,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:27:23,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:27:23,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:27:23,512 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:27:23,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:27:23,513 INFO L85 PathProgramCache]: Analyzing trace with hash -686479404, now seen corresponding path program 1 times [2022-11-23 14:27:23,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:27:23,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700907114] [2022-11-23 14:27:23,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:23,514 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:27:23,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:27:23,515 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:27:23,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-23 14:27:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:23,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:27:23,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:23,674 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:27:23,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:27:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:27:23,752 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:27:23,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700907114] [2022-11-23 14:27:23,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1700907114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:27:23,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [618738690] [2022-11-23 14:27:23,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:23,755 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:27:23,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:27:23,756 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:27:23,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-23 14:27:23,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:23,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:27:23,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:27:23,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:27:23,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [618738690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:27:23,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:27:23,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8] total 12 [2022-11-23 14:27:23,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51183524] [2022-11-23 14:27:23,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:27:23,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 14:27:23,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:27:23,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 14:27:23,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:27:23,934 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 14:27:24,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:27:24,132 INFO L93 Difference]: Finished difference Result 114 states and 148 transitions. [2022-11-23 14:27:24,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 14:27:24,133 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2022-11-23 14:27:24,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:27:24,136 INFO L225 Difference]: With dead ends: 114 [2022-11-23 14:27:24,138 INFO L226 Difference]: Without dead ends: 91 [2022-11-23 14:27:24,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-11-23 14:27:24,141 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 20 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:27:24,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 508 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:27:24,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-23 14:27:24,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2022-11-23 14:27:24,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 59 states have (on average 1.271186440677966) internal successors, (75), 61 states have internal predecessors, (75), 12 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-23 14:27:24,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2022-11-23 14:27:24,160 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 39 [2022-11-23 14:27:24,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:27:24,161 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2022-11-23 14:27:24,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 14:27:24,161 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2022-11-23 14:27:24,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-23 14:27:24,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:27:24,167 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-23 14:27:24,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:27:24,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:27:24,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:27:24,579 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:27:24,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:27:24,579 INFO L85 PathProgramCache]: Analyzing trace with hash 461161469, now seen corresponding path program 2 times [2022-11-23 14:27:24,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:27:24,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1008634121] [2022-11-23 14:27:24,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:27:24,583 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:27:24,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:27:24,589 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:27:24,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-23 14:27:24,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-23 14:27:24,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:27:24,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:27:24,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:24,830 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 14:27:24,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:27:24,830 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:27:24,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1008634121] [2022-11-23 14:27:24,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1008634121] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:27:24,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:27:24,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:27:24,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065761244] [2022-11-23 14:27:24,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:27:24,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:27:24,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:27:24,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:27:24,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:27:24,832 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:27:26,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:27:26,166 INFO L93 Difference]: Finished difference Result 109 states and 139 transitions. [2022-11-23 14:27:26,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:27:26,167 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-11-23 14:27:26,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:27:26,169 INFO L225 Difference]: With dead ends: 109 [2022-11-23 14:27:26,169 INFO L226 Difference]: Without dead ends: 107 [2022-11-23 14:27:26,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:27:26,170 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 30 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:27:26,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 330 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-23 14:27:26,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-23 14:27:26,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2022-11-23 14:27:26,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 66 states have internal predecessors, (80), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) [2022-11-23 14:27:26,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 109 transitions. [2022-11-23 14:27:26,187 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 109 transitions. Word has length 39 [2022-11-23 14:27:26,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:27:26,187 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 109 transitions. [2022-11-23 14:27:26,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:27:26,188 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 109 transitions. [2022-11-23 14:27:26,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-23 14:27:26,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:27:26,189 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-23 14:27:26,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:27:26,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:27:26,406 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:27:26,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:27:26,407 INFO L85 PathProgramCache]: Analyzing trace with hash 518419771, now seen corresponding path program 1 times [2022-11-23 14:27:26,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:27:26,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1540141543] [2022-11-23 14:27:26,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:26,407 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:27:26,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:27:26,408 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:27:26,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-23 14:27:26,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:26,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:27:26,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:26,609 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 14:27:26,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:27:26,610 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:27:26,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1540141543] [2022-11-23 14:27:26,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1540141543] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:27:26,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:27:26,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:27:26,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613653898] [2022-11-23 14:27:26,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:27:26,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:27:26,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:27:26,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:27:26,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:27:26,612 INFO L87 Difference]: Start difference. First operand 85 states and 109 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:27:28,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:27:30,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:27:30,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:27:30,787 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2022-11-23 14:27:30,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:27:30,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-11-23 14:27:30,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:27:30,789 INFO L225 Difference]: With dead ends: 95 [2022-11-23 14:27:30,789 INFO L226 Difference]: Without dead ends: 93 [2022-11-23 14:27:30,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:27:30,790 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 29 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:27:30,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 293 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 2 Unknown, 0 Unchecked, 4.1s Time] [2022-11-23 14:27:30,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-23 14:27:30,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2022-11-23 14:27:30,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 64 states have internal predecessors, (78), 12 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-23 14:27:30,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2022-11-23 14:27:30,802 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 39 [2022-11-23 14:27:30,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:27:30,803 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2022-11-23 14:27:30,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:27:30,803 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2022-11-23 14:27:30,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-23 14:27:30,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:27:30,818 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-11-23 14:27:30,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-11-23 14:27:31,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:27:31,047 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:27:31,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:27:31,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1863687100, now seen corresponding path program 1 times [2022-11-23 14:27:31,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:27:31,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [836425623] [2022-11-23 14:27:31,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:31,048 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:27:31,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:27:31,049 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:27:31,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-23 14:27:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:31,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:27:31,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:27:31,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:27:31,344 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:27:31,344 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:27:31,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [836425623] [2022-11-23 14:27:31,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [836425623] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:27:31,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1279586859] [2022-11-23 14:27:31,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:31,345 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:27:31,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:27:31,347 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:27:31,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-23 14:27:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:31,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:27:31,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:27:31,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:27:31,590 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:27:31,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1279586859] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:27:31,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220110623] [2022-11-23 14:27:31,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:31,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:27:31,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:27:31,592 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:27:31,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 14:27:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:31,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:27:31,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:31,706 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:27:31,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:27:31,825 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:27:31,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220110623] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:27:31,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:27:31,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 9 [2022-11-23 14:27:31,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967967136] [2022-11-23 14:27:31,826 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:27:31,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 14:27:31,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:27:31,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 14:27:31,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:27:31,827 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:27:32,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:27:32,044 INFO L93 Difference]: Finished difference Result 129 states and 168 transitions. [2022-11-23 14:27:32,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:27:32,045 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-11-23 14:27:32,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:27:32,046 INFO L225 Difference]: With dead ends: 129 [2022-11-23 14:27:32,047 INFO L226 Difference]: Without dead ends: 118 [2022-11-23 14:27:32,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:27:32,048 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 47 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:27:32,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 471 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:27:32,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-23 14:27:32,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 97. [2022-11-23 14:27:32,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 75 states have internal predecessors, (88), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (21), 14 states have call predecessors, (21), 14 states have call successors, (21) [2022-11-23 14:27:32,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 124 transitions. [2022-11-23 14:27:32,067 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 124 transitions. Word has length 44 [2022-11-23 14:27:32,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:27:32,067 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 124 transitions. [2022-11-23 14:27:32,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:27:32,068 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 124 transitions. [2022-11-23 14:27:32,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-23 14:27:32,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:27:32,069 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-11-23 14:27:32,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-23 14:27:32,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-23 14:27:32,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 14:27:32,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:27:32,671 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:27:32,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:27:32,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1162622522, now seen corresponding path program 1 times [2022-11-23 14:27:32,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:27:32,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305561534] [2022-11-23 14:27:32,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:32,672 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:27:32,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:27:32,674 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:27:32,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-23 14:27:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:32,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 14:27:32,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:32,862 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:27:32,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:27:32,862 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:27:32,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305561534] [2022-11-23 14:27:32,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1305561534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:27:32,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:27:32,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-23 14:27:32,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677075648] [2022-11-23 14:27:32,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:27:32,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 14:27:32,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:27:32,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 14:27:32,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:27:32,864 INFO L87 Difference]: Start difference. First operand 97 states and 124 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:27:33,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:27:33,204 INFO L93 Difference]: Finished difference Result 133 states and 170 transitions. [2022-11-23 14:27:33,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 14:27:33,205 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-11-23 14:27:33,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:27:33,206 INFO L225 Difference]: With dead ends: 133 [2022-11-23 14:27:33,206 INFO L226 Difference]: Without dead ends: 126 [2022-11-23 14:27:33,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-23 14:27:33,208 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 35 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:27:33,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 562 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:27:33,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-23 14:27:33,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2022-11-23 14:27:33,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 76 states have internal predecessors, (90), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2022-11-23 14:27:33,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2022-11-23 14:27:33,245 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 44 [2022-11-23 14:27:33,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:27:33,246 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2022-11-23 14:27:33,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:27:33,246 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2022-11-23 14:27:33,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 14:27:33,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:27:33,249 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-11-23 14:27:33,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-23 14:27:33,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:27:33,460 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:27:33,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:27:33,461 INFO L85 PathProgramCache]: Analyzing trace with hash -977013140, now seen corresponding path program 1 times [2022-11-23 14:27:33,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:27:33,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431904516] [2022-11-23 14:27:33,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:33,462 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:27:33,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:27:33,463 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:27:33,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-23 14:27:33,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:33,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 14:27:33,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:33,647 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:27:33,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:27:33,848 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:27:33,848 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:27:33,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431904516] [2022-11-23 14:27:33,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431904516] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:27:33,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [244181780] [2022-11-23 14:27:33,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:33,848 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:27:33,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:27:33,850 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:27:33,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-23 14:27:33,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:33,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 14:27:33,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:34,090 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:27:34,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:27:34,342 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:27:34,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [244181780] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:27:34,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895893469] [2022-11-23 14:27:34,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:34,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:27:34,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:27:34,344 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:27:34,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 14:27:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:34,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 14:27:34,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:27:34,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:27:34,580 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:27:34,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895893469] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:27:34,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:27:34,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10, 10, 11, 11] total 21 [2022-11-23 14:27:34,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700519406] [2022-11-23 14:27:34,581 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:27:34,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 14:27:34,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:27:34,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 14:27:34,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2022-11-23 14:27:34,583 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 6 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-23 14:27:35,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:27:35,352 INFO L93 Difference]: Finished difference Result 177 states and 229 transitions. [2022-11-23 14:27:35,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-23 14:27:35,353 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 6 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) Word has length 46 [2022-11-23 14:27:35,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:27:35,354 INFO L225 Difference]: With dead ends: 177 [2022-11-23 14:27:35,355 INFO L226 Difference]: Without dead ends: 148 [2022-11-23 14:27:35,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2022-11-23 14:27:35,356 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 114 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:27:35,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 1084 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:27:35,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-23 14:27:35,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 123. [2022-11-23 14:27:35,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 92 states have (on average 1.2065217391304348) internal successors, (111), 94 states have internal predecessors, (111), 18 states have call successors, (18), 9 states have call predecessors, (18), 12 states have return successors, (29), 19 states have call predecessors, (29), 17 states have call successors, (29) [2022-11-23 14:27:35,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 158 transitions. [2022-11-23 14:27:35,390 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 158 transitions. Word has length 46 [2022-11-23 14:27:35,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:27:35,393 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 158 transitions. [2022-11-23 14:27:35,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 6 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-23 14:27:35,394 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 158 transitions. [2022-11-23 14:27:35,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 14:27:35,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:27:35,395 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-11-23 14:27:35,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-23 14:27:35,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 14:27:35,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-23 14:27:35,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:27:35,998 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:27:35,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:27:35,998 INFO L85 PathProgramCache]: Analyzing trace with hash -919754838, now seen corresponding path program 1 times [2022-11-23 14:27:35,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:27:35,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1695538464] [2022-11-23 14:27:35,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:35,999 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:27:35,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:27:36,001 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:27:36,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-23 14:27:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:36,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 14:27:36,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:36,125 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 14:27:36,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:27:36,126 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:27:36,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1695538464] [2022-11-23 14:27:36,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1695538464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:27:36,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:27:36,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:27:36,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696521470] [2022-11-23 14:27:36,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:27:36,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:27:36,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:27:36,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:27:36,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:27:36,128 INFO L87 Difference]: Start difference. First operand 123 states and 158 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-23 14:27:36,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:27:36,199 INFO L93 Difference]: Finished difference Result 131 states and 165 transitions. [2022-11-23 14:27:36,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:27:36,200 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2022-11-23 14:27:36,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:27:36,202 INFO L225 Difference]: With dead ends: 131 [2022-11-23 14:27:36,202 INFO L226 Difference]: Without dead ends: 110 [2022-11-23 14:27:36,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:27:36,207 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 6 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:27:36,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 309 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:27:36,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-23 14:27:36,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-11-23 14:27:36,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.1951219512195121) internal successors, (98), 85 states have internal predecessors, (98), 16 states have call successors, (16), 8 states have call predecessors, (16), 11 states have return successors, (25), 16 states have call predecessors, (25), 15 states have call successors, (25) [2022-11-23 14:27:36,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 139 transitions. [2022-11-23 14:27:36,238 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 139 transitions. Word has length 46 [2022-11-23 14:27:36,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:27:36,238 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 139 transitions. [2022-11-23 14:27:36,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-23 14:27:36,239 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 139 transitions. [2022-11-23 14:27:36,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-23 14:27:36,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:27:36,242 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-23 14:27:36,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-23 14:27:36,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:27:36,455 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:27:36,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:27:36,455 INFO L85 PathProgramCache]: Analyzing trace with hash -168643793, now seen corresponding path program 1 times [2022-11-23 14:27:36,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:27:36,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127339635] [2022-11-23 14:27:36,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:36,457 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:27:36,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:27:36,458 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:27:36,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-23 14:27:36,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:36,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:27:36,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:36,741 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:27:36,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:27:37,245 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:27:37,245 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:27:37,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127339635] [2022-11-23 14:27:37,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127339635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:27:37,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1550505284] [2022-11-23 14:27:37,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:37,246 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:27:37,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:27:37,247 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:27:37,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-23 14:27:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:37,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:27:37,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:37,379 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:27:37,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:27:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:27:37,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1550505284] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:27:37,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787247768] [2022-11-23 14:27:37,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:37,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:27:37,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:27:37,519 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:27:37,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-23 14:27:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:37,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:27:37,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:37,637 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:27:37,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:27:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:27:37,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787247768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:27:37,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:27:37,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 24 [2022-11-23 14:27:37,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558638695] [2022-11-23 14:27:37,800 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:27:37,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 14:27:37,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:27:37,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 14:27:37,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2022-11-23 14:27:37,801 INFO L87 Difference]: Start difference. First operand 110 states and 139 transitions. Second operand has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 14:27:39,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:27:39,269 INFO L93 Difference]: Finished difference Result 156 states and 213 transitions. [2022-11-23 14:27:39,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 14:27:39,270 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2022-11-23 14:27:39,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:27:39,271 INFO L225 Difference]: With dead ends: 156 [2022-11-23 14:27:39,271 INFO L226 Difference]: Without dead ends: 122 [2022-11-23 14:27:39,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2022-11-23 14:27:39,273 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 148 mSDsluCounter, 1134 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 1205 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:27:39,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 1205 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 14:27:39,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-23 14:27:39,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 99. [2022-11-23 14:27:39,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 78 states have internal predecessors, (88), 14 states have call successors, (14), 6 states have call predecessors, (14), 11 states have return successors, (32), 14 states have call predecessors, (32), 13 states have call successors, (32) [2022-11-23 14:27:39,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 134 transitions. [2022-11-23 14:27:39,290 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 134 transitions. Word has length 48 [2022-11-23 14:27:39,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:27:39,290 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 134 transitions. [2022-11-23 14:27:39,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 14:27:39,291 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 134 transitions. [2022-11-23 14:27:39,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-23 14:27:39,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:27:39,292 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-23 14:27:39,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-23 14:27:39,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-23 14:27:39,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-23 14:27:39,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:27:39,903 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:27:39,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:27:39,903 INFO L85 PathProgramCache]: Analyzing trace with hash 291178745, now seen corresponding path program 2 times [2022-11-23 14:27:39,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:27:39,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437089561] [2022-11-23 14:27:39,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:27:39,904 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:27:39,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:27:39,905 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:27:39,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-23 14:27:39,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:27:39,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:27:39,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:27:39,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:40,172 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:27:40,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:27:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:27:40,690 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:27:40,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437089561] [2022-11-23 14:27:40,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437089561] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:27:40,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1367927132] [2022-11-23 14:27:40,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:27:40,691 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:27:40,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:27:40,695 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:27:40,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-23 14:27:40,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:27:40,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:27:40,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:27:40,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:40,825 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:27:40,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:27:40,990 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:27:40,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1367927132] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:27:40,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047555028] [2022-11-23 14:27:40,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:27:40,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:27:40,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:27:40,992 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:27:41,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-23 14:27:41,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:27:41,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:27:41,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:27:41,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:41,126 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:27:41,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:27:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:27:41,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047555028] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:27:41,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:27:41,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 24 [2022-11-23 14:27:41,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877123221] [2022-11-23 14:27:41,282 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:27:41,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 14:27:41,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:27:41,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 14:27:41,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2022-11-23 14:27:41,284 INFO L87 Difference]: Start difference. First operand 99 states and 134 transitions. Second operand has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 14:27:42,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:27:42,535 INFO L93 Difference]: Finished difference Result 137 states and 186 transitions. [2022-11-23 14:27:42,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 14:27:42,536 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2022-11-23 14:27:42,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:27:42,537 INFO L225 Difference]: With dead ends: 137 [2022-11-23 14:27:42,538 INFO L226 Difference]: Without dead ends: 110 [2022-11-23 14:27:42,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2022-11-23 14:27:42,539 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 163 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:27:42,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 873 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:27:42,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-23 14:27:42,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 83. [2022-11-23 14:27:42,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 66 states have internal predecessors, (76), 12 states have call successors, (12), 4 states have call predecessors, (12), 9 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2022-11-23 14:27:42,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 116 transitions. [2022-11-23 14:27:42,554 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 116 transitions. Word has length 48 [2022-11-23 14:27:42,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:27:42,554 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 116 transitions. [2022-11-23 14:27:42,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 14:27:42,555 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 116 transitions. [2022-11-23 14:27:42,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-23 14:27:42,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:27:42,556 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 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] [2022-11-23 14:27:42,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-23 14:27:42,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-23 14:27:42,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2022-11-23 14:27:43,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:27:43,167 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:27:43,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:27:43,168 INFO L85 PathProgramCache]: Analyzing trace with hash -744862915, now seen corresponding path program 1 times [2022-11-23 14:27:43,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:27:43,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486302756] [2022-11-23 14:27:43,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:43,169 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:27:43,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:27:43,170 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:27:43,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-23 14:27:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:43,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:27:43,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:43,473 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 14:27:43,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:27:43,473 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:27:43,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486302756] [2022-11-23 14:27:43,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486302756] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:27:43,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:27:43,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 14:27:43,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977137474] [2022-11-23 14:27:43,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:27:43,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:27:43,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:27:43,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:27:43,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:27:43,475 INFO L87 Difference]: Start difference. First operand 83 states and 116 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 14:27:45,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:27:47,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:27:47,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:27:47,719 INFO L93 Difference]: Finished difference Result 94 states and 130 transitions. [2022-11-23 14:27:47,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:27:47,719 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-11-23 14:27:47,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:27:47,720 INFO L225 Difference]: With dead ends: 94 [2022-11-23 14:27:47,720 INFO L226 Difference]: Without dead ends: 92 [2022-11-23 14:27:47,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:27:47,722 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 20 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:27:47,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 297 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-11-23 14:27:47,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-23 14:27:47,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2022-11-23 14:27:47,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.234375) internal successors, (79), 70 states have internal predecessors, (79), 13 states have call successors, (13), 5 states have call predecessors, (13), 10 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) [2022-11-23 14:27:47,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2022-11-23 14:27:47,736 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 49 [2022-11-23 14:27:47,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:27:47,736 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2022-11-23 14:27:47,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 14:27:47,737 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2022-11-23 14:27:47,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-23 14:27:47,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:27:47,738 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 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] [2022-11-23 14:27:47,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-23 14:27:47,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:27:47,949 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:27:47,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:27:47,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1846975685, now seen corresponding path program 1 times [2022-11-23 14:27:47,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:27:47,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1610182083] [2022-11-23 14:27:47,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:47,951 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:27:47,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:27:47,954 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:27:47,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-23 14:27:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:48,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:27:48,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 14:27:51,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:27:51,674 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:27:51,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1610182083] [2022-11-23 14:27:51,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1610182083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:27:51,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:27:51,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 14:27:51,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673207590] [2022-11-23 14:27:51,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:27:51,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:27:51,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:27:51,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:27:51,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:27:51,676 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 14:27:53,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:27:55,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:27:57,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:27:59,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:28:01,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:28:03,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:28:04,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:28:04,160 INFO L93 Difference]: Finished difference Result 98 states and 133 transitions. [2022-11-23 14:28:04,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:28:04,161 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2022-11-23 14:28:04,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:28:04,162 INFO L225 Difference]: With dead ends: 98 [2022-11-23 14:28:04,162 INFO L226 Difference]: Without dead ends: 94 [2022-11-23 14:28:04,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:28:04,163 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 26 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:28:04,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 296 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 6 Unknown, 0 Unchecked, 12.4s Time] [2022-11-23 14:28:04,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-23 14:28:04,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2022-11-23 14:28:04,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 67 states have internal predecessors, (77), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2022-11-23 14:28:04,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 117 transitions. [2022-11-23 14:28:04,179 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 117 transitions. Word has length 50 [2022-11-23 14:28:04,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:28:04,180 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 117 transitions. [2022-11-23 14:28:04,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 14:28:04,180 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 117 transitions. [2022-11-23 14:28:04,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-23 14:28:04,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:28:04,181 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 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] [2022-11-23 14:28:04,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-23 14:28:04,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:28:04,393 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:28:04,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:28:04,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1592416888, now seen corresponding path program 1 times [2022-11-23 14:28:04,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:28:04,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711151160] [2022-11-23 14:28:04,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:04,394 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:28:04,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:28:04,395 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:28:04,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-23 14:28:04,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:04,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:28:04,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:28:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:28:04,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:28:04,782 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:28:04,783 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:28:04,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711151160] [2022-11-23 14:28:04,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711151160] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:28:04,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1667189046] [2022-11-23 14:28:04,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:04,783 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:28:04,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:28:04,787 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:28:04,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-23 14:28:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:04,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 14:28:04,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:28:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 14:28:05,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:28:05,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1667189046] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:28:05,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:28:05,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-23 14:28:05,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978940403] [2022-11-23 14:28:05,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:28:05,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:28:05,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:28:05,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:28:05,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-23 14:28:05,038 INFO L87 Difference]: Start difference. First operand 85 states and 117 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:28:05,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:28:05,166 INFO L93 Difference]: Finished difference Result 117 states and 175 transitions. [2022-11-23 14:28:05,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:28:05,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2022-11-23 14:28:05,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:28:05,170 INFO L225 Difference]: With dead ends: 117 [2022-11-23 14:28:05,170 INFO L226 Difference]: Without dead ends: 106 [2022-11-23 14:28:05,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-23 14:28:05,171 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 31 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:28:05,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 280 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:28:05,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-23 14:28:05,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 99. [2022-11-23 14:28:05,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 78 states have internal predecessors, (88), 15 states have call successors, (15), 5 states have call predecessors, (15), 11 states have return successors, (44), 15 states have call predecessors, (44), 14 states have call successors, (44) [2022-11-23 14:28:05,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 147 transitions. [2022-11-23 14:28:05,194 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 147 transitions. Word has length 54 [2022-11-23 14:28:05,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:28:05,195 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 147 transitions. [2022-11-23 14:28:05,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:28:05,195 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 147 transitions. [2022-11-23 14:28:05,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-23 14:28:05,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:28:05,197 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 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, 1, 1] [2022-11-23 14:28:05,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-23 14:28:05,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-23 14:28:05,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:28:05,609 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:28:05,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:28:05,609 INFO L85 PathProgramCache]: Analyzing trace with hash 18588658, now seen corresponding path program 1 times [2022-11-23 14:28:05,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:28:05,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465424744] [2022-11-23 14:28:05,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:05,610 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:28:05,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:28:05,611 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:28:05,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-23 14:28:05,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:05,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:28:05,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:28:05,805 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:28:05,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:28:06,055 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:28:06,055 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:28:06,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465424744] [2022-11-23 14:28:06,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1465424744] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:28:06,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [847920189] [2022-11-23 14:28:06,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:06,055 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:28:06,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:28:06,058 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:28:06,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-23 14:28:06,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:06,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:28:06,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:28:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:28:06,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:28:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:28:06,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [847920189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:28:06,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438209425] [2022-11-23 14:28:06,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:06,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:28:06,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:28:06,399 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:28:06,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-23 14:28:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:06,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:28:06,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:28:06,532 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:28:06,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:28:06,712 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:28:06,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438209425] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:28:06,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:28:06,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-11-23 14:28:06,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524383145] [2022-11-23 14:28:06,713 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:28:06,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 14:28:06,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:28:06,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 14:28:06,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:28:06,714 INFO L87 Difference]: Start difference. First operand 99 states and 147 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-23 14:28:07,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:28:07,010 INFO L93 Difference]: Finished difference Result 113 states and 165 transitions. [2022-11-23 14:28:07,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:28:07,011 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2022-11-23 14:28:07,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:28:07,013 INFO L225 Difference]: With dead ends: 113 [2022-11-23 14:28:07,013 INFO L226 Difference]: Without dead ends: 102 [2022-11-23 14:28:07,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-11-23 14:28:07,014 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 114 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:28:07,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 479 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:28:07,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-23 14:28:07,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-11-23 14:28:07,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.2162162162162162) internal successors, (90), 81 states have internal predecessors, (90), 15 states have call successors, (15), 5 states have call predecessors, (15), 12 states have return successors, (46), 15 states have call predecessors, (46), 14 states have call successors, (46) [2022-11-23 14:28:07,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 151 transitions. [2022-11-23 14:28:07,039 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 151 transitions. Word has length 63 [2022-11-23 14:28:07,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:28:07,040 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 151 transitions. [2022-11-23 14:28:07,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-23 14:28:07,040 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 151 transitions. [2022-11-23 14:28:07,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-23 14:28:07,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:28:07,047 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 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, 1, 1] [2022-11-23 14:28:07,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-23 14:28:07,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-11-23 14:28:07,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2022-11-23 14:28:07,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:28:07,654 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:28:07,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:28:07,654 INFO L85 PathProgramCache]: Analyzing trace with hash -177633806, now seen corresponding path program 2 times [2022-11-23 14:28:07,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:28:07,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [471018550] [2022-11-23 14:28:07,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:28:07,655 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:28:07,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:28:07,656 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:28:07,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-23 14:28:07,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:28:07,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:28:07,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:28:07,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:28:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:28:07,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:28:08,077 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:28:08,077 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:28:08,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [471018550] [2022-11-23 14:28:08,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [471018550] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:28:08,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [188314405] [2022-11-23 14:28:08,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:28:08,077 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:28:08,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:28:08,078 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:28:08,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-23 14:28:08,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:28:08,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:28:08,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:28:08,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:28:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:28:08,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:28:08,425 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:28:08,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [188314405] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:28:08,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903297771] [2022-11-23 14:28:08,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:28:08,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:28:08,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:28:08,426 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:28:08,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-23 14:28:08,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:28:08,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:28:08,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:28:08,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:28:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:28:08,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:28:08,728 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:28:08,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903297771] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:28:08,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:28:08,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-11-23 14:28:08,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313042357] [2022-11-23 14:28:08,728 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:28:08,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 14:28:08,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:28:08,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 14:28:08,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:28:08,730 INFO L87 Difference]: Start difference. First operand 102 states and 151 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-23 14:28:09,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:28:09,083 INFO L93 Difference]: Finished difference Result 115 states and 169 transitions. [2022-11-23 14:28:09,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:28:09,084 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2022-11-23 14:28:09,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:28:09,085 INFO L225 Difference]: With dead ends: 115 [2022-11-23 14:28:09,085 INFO L226 Difference]: Without dead ends: 102 [2022-11-23 14:28:09,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-23 14:28:09,086 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 87 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:28:09,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 589 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:28:09,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-23 14:28:09,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-11-23 14:28:09,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.2162162162162162) internal successors, (90), 81 states have internal predecessors, (90), 15 states have call successors, (15), 5 states have call predecessors, (15), 12 states have return successors, (45), 15 states have call predecessors, (45), 14 states have call successors, (45) [2022-11-23 14:28:09,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 150 transitions. [2022-11-23 14:28:09,114 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 150 transitions. Word has length 63 [2022-11-23 14:28:09,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:28:09,114 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 150 transitions. [2022-11-23 14:28:09,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-23 14:28:09,115 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 150 transitions. [2022-11-23 14:28:09,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-23 14:28:09,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:28:09,117 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2022-11-23 14:28:09,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-11-23 14:28:09,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-23 14:28:09,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-11-23 14:28:09,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:28:09,719 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:28:09,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:28:09,719 INFO L85 PathProgramCache]: Analyzing trace with hash -2130957302, now seen corresponding path program 1 times [2022-11-23 14:28:09,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:28:09,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130367484] [2022-11-23 14:28:09,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:09,720 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:28:09,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:28:09,721 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:28:09,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-23 14:28:09,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:09,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:28:09,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:28:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:28:09,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:28:10,154 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:28:10,155 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:28:10,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130367484] [2022-11-23 14:28:10,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130367484] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:28:10,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1601563450] [2022-11-23 14:28:10,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:10,155 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:28:10,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:28:10,160 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:28:10,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-23 14:28:10,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:10,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:28:10,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:28:10,320 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:28:10,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:28:10,503 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:28:10,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1601563450] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:28:10,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735411241] [2022-11-23 14:28:10,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:10,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:28:10,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:28:10,505 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:28:10,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-23 14:28:10,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:10,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:28:10,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:28:10,619 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:28:10,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:28:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:28:10,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735411241] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:28:10,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:28:10,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-11-23 14:28:10,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884095290] [2022-11-23 14:28:10,775 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:28:10,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 14:28:10,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:28:10,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 14:28:10,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:28:10,777 INFO L87 Difference]: Start difference. First operand 102 states and 150 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-23 14:28:11,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:28:11,043 INFO L93 Difference]: Finished difference Result 113 states and 161 transitions. [2022-11-23 14:28:11,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:28:11,044 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2022-11-23 14:28:11,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:28:11,045 INFO L225 Difference]: With dead ends: 113 [2022-11-23 14:28:11,045 INFO L226 Difference]: Without dead ends: 99 [2022-11-23 14:28:11,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-23 14:28:11,047 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 126 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:28:11,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 399 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:28:11,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-23 14:28:11,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-11-23 14:28:11,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 78 states have internal predecessors, (87), 15 states have call successors, (15), 5 states have call predecessors, (15), 11 states have return successors, (41), 15 states have call predecessors, (41), 14 states have call successors, (41) [2022-11-23 14:28:11,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 143 transitions. [2022-11-23 14:28:11,062 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 143 transitions. Word has length 65 [2022-11-23 14:28:11,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:28:11,063 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 143 transitions. [2022-11-23 14:28:11,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-23 14:28:11,063 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 143 transitions. [2022-11-23 14:28:11,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-23 14:28:11,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:28:11,065 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2022-11-23 14:28:11,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-11-23 14:28:11,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-11-23 14:28:11,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-23 14:28:11,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:28:11,671 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:28:11,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:28:11,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1269391674, now seen corresponding path program 2 times [2022-11-23 14:28:11,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:28:11,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649913935] [2022-11-23 14:28:11,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:28:11,672 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:28:11,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:28:11,673 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:28:11,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-23 14:28:11,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:28:11,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:28:11,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:28:11,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:28:11,866 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:28:11,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:28:12,067 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:28:12,067 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:28:12,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649913935] [2022-11-23 14:28:12,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649913935] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:28:12,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [301010290] [2022-11-23 14:28:12,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:28:12,068 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:28:12,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:28:12,069 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:28:12,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-23 14:28:12,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:28:12,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:28:12,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:28:12,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:28:12,240 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:28:12,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:28:12,407 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:28:12,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [301010290] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:28:12,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824735927] [2022-11-23 14:28:12,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:28:12,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:28:12,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:28:12,411 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:28:12,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-23 14:28:12,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:28:12,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:28:12,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:28:12,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:28:12,561 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:28:12,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:28:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:28:12,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824735927] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:28:12,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:28:12,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-11-23 14:28:12,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067070605] [2022-11-23 14:28:12,723 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:28:12,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 14:28:12,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:28:12,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 14:28:12,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:28:12,724 INFO L87 Difference]: Start difference. First operand 99 states and 143 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-23 14:28:12,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:28:12,967 INFO L93 Difference]: Finished difference Result 110 states and 154 transitions. [2022-11-23 14:28:12,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:28:12,968 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2022-11-23 14:28:12,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:28:12,969 INFO L225 Difference]: With dead ends: 110 [2022-11-23 14:28:12,969 INFO L226 Difference]: Without dead ends: 96 [2022-11-23 14:28:12,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-11-23 14:28:12,970 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 126 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:28:12,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 418 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:28:12,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-23 14:28:12,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-11-23 14:28:12,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 70 states have (on average 1.2) internal successors, (84), 75 states have internal predecessors, (84), 15 states have call successors, (15), 5 states have call predecessors, (15), 10 states have return successors, (39), 15 states have call predecessors, (39), 14 states have call successors, (39) [2022-11-23 14:28:12,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 138 transitions. [2022-11-23 14:28:12,986 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 138 transitions. Word has length 65 [2022-11-23 14:28:12,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:28:12,986 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 138 transitions. [2022-11-23 14:28:12,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-23 14:28:12,986 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 138 transitions. [2022-11-23 14:28:12,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-23 14:28:12,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:28:12,988 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 14:28:12,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-11-23 14:28:13,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-11-23 14:28:13,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-23 14:28:13,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:28:13,591 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:28:13,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:28:13,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1279345645, now seen corresponding path program 1 times [2022-11-23 14:28:13,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:28:13,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [134877078] [2022-11-23 14:28:13,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:13,592 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:28:13,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:28:13,593 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:28:13,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-23 14:28:13,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:13,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 14:28:13,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:28:14,709 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 14:28:14,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:28:17,807 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:28:17,808 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:28:17,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [134877078] [2022-11-23 14:28:17,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [134877078] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:28:17,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2035473030] [2022-11-23 14:28:17,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:17,808 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:28:17,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:28:17,811 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:28:17,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-23 14:28:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:17,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-23 14:28:17,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:28:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 14:28:18,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:28:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:28:20,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2035473030] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:28:20,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294879869] [2022-11-23 14:28:20,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:20,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:28:20,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:28:20,058 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:28:20,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-23 14:28:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:20,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 14:28:20,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:28:20,417 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 14:28:20,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:28:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:28:21,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294879869] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:28:21,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:28:21,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16, 16, 15, 16] total 30 [2022-11-23 14:28:21,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257338733] [2022-11-23 14:28:21,526 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:28:21,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-23 14:28:21,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:28:21,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-23 14:28:21,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-11-23 14:28:21,528 INFO L87 Difference]: Start difference. First operand 96 states and 138 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-23 14:28:28,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:28:28,709 INFO L93 Difference]: Finished difference Result 163 states and 228 transitions. [2022-11-23 14:28:28,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-23 14:28:28,711 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 72 [2022-11-23 14:28:28,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:28:28,712 INFO L225 Difference]: With dead ends: 163 [2022-11-23 14:28:28,712 INFO L226 Difference]: Without dead ends: 125 [2022-11-23 14:28:28,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 393 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=527, Invalid=2443, Unknown=0, NotChecked=0, Total=2970 [2022-11-23 14:28:28,714 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 312 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:28:28,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 973 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-23 14:28:28,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-23 14:28:28,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 113. [2022-11-23 14:28:28,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 83 states have (on average 1.180722891566265) internal successors, (98), 88 states have internal predecessors, (98), 18 states have call successors, (18), 6 states have call predecessors, (18), 11 states have return successors, (51), 18 states have call predecessors, (51), 17 states have call successors, (51) [2022-11-23 14:28:28,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 167 transitions. [2022-11-23 14:28:28,737 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 167 transitions. Word has length 72 [2022-11-23 14:28:28,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:28:28,737 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 167 transitions. [2022-11-23 14:28:28,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-23 14:28:28,738 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 167 transitions. [2022-11-23 14:28:28,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-23 14:28:28,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:28:28,740 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 14:28:28,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-23 14:28:28,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2022-11-23 14:28:29,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-11-23 14:28:29,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:28:29,346 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:28:29,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:28:29,347 INFO L85 PathProgramCache]: Analyzing trace with hash -784876239, now seen corresponding path program 2 times [2022-11-23 14:28:29,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:28:29,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477546764] [2022-11-23 14:28:29,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:28:29,347 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:28:29,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:28:29,348 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:28:29,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-23 14:28:29,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:28:29,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:28:29,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 14:28:29,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:28:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 14:28:30,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:28:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:28:33,309 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:28:33,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477546764] [2022-11-23 14:28:33,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477546764] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:28:33,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2136773610] [2022-11-23 14:28:33,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:28:33,310 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:28:33,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:28:33,315 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:28:33,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-23 14:28:33,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:28:33,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:28:33,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 14:28:33,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:28:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 14:28:33,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:28:34,848 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:28:34,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2136773610] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:28:34,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846423315] [2022-11-23 14:28:34,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:28:34,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:28:34,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:28:34,850 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:28:34,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-23 14:28:34,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:28:34,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:28:34,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 14:28:34,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:28:35,215 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 14:28:35,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:28:36,486 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:28:36,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846423315] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:28:36,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:28:36,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15, 16, 15, 16] total 28 [2022-11-23 14:28:36,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813748025] [2022-11-23 14:28:36,487 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:28:36,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-23 14:28:36,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:28:36,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-23 14:28:36,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-11-23 14:28:36,494 INFO L87 Difference]: Start difference. First operand 113 states and 167 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-23 14:28:44,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:28:44,645 INFO L93 Difference]: Finished difference Result 182 states and 254 transitions. [2022-11-23 14:28:44,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-23 14:28:44,647 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 72 [2022-11-23 14:28:44,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:28:44,649 INFO L225 Difference]: With dead ends: 182 [2022-11-23 14:28:44,649 INFO L226 Difference]: Without dead ends: 142 [2022-11-23 14:28:44,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 394 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=484, Invalid=2168, Unknown=0, NotChecked=0, Total=2652 [2022-11-23 14:28:44,651 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 333 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:28:44,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 1001 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-23 14:28:44,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-23 14:28:44,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 128. [2022-11-23 14:28:44,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 95 states have (on average 1.168421052631579) internal successors, (111), 100 states have internal predecessors, (111), 20 states have call successors, (20), 7 states have call predecessors, (20), 12 states have return successors, (53), 20 states have call predecessors, (53), 19 states have call successors, (53) [2022-11-23 14:28:44,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 184 transitions. [2022-11-23 14:28:44,678 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 184 transitions. Word has length 72 [2022-11-23 14:28:44,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:28:44,679 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 184 transitions. [2022-11-23 14:28:44,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-23 14:28:44,679 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 184 transitions. [2022-11-23 14:28:44,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-23 14:28:44,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:28:44,681 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 14:28:44,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-23 14:28:44,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2022-11-23 14:28:45,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-11-23 14:28:45,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:28:45,288 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:28:45,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:28:45,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1250321149, now seen corresponding path program 1 times [2022-11-23 14:28:45,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:28:45,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055197326] [2022-11-23 14:28:45,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:45,289 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:28:45,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:28:45,290 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:28:45,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-23 14:28:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:45,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 14:28:45,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:28:46,367 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 14:28:46,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:28:49,248 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:28:49,248 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:28:49,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055197326] [2022-11-23 14:28:49,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055197326] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:28:49,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1683591449] [2022-11-23 14:28:49,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:49,249 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:28:49,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:28:49,250 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:28:49,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-23 14:28:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:49,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 14:28:49,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:28:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 14:28:49,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:28:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:28:50,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1683591449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:28:50,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371910588] [2022-11-23 14:28:50,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:50,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:28:50,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:28:50,821 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:28:50,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-23 14:28:50,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:50,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 14:28:50,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:28:51,193 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 14:28:51,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:28:52,162 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:28:52,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371910588] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:28:52,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:28:52,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15, 16, 15, 16] total 28 [2022-11-23 14:28:52,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945519337] [2022-11-23 14:28:52,163 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:28:52,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-23 14:28:52,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:28:52,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-23 14:28:52,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2022-11-23 14:28:52,165 INFO L87 Difference]: Start difference. First operand 128 states and 184 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-23 14:28:56,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:28:56,951 INFO L93 Difference]: Finished difference Result 160 states and 220 transitions. [2022-11-23 14:28:56,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 14:28:56,952 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 74 [2022-11-23 14:28:56,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:28:56,954 INFO L225 Difference]: With dead ends: 160 [2022-11-23 14:28:56,954 INFO L226 Difference]: Without dead ends: 140 [2022-11-23 14:28:56,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 411 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=381, Invalid=1511, Unknown=0, NotChecked=0, Total=1892 [2022-11-23 14:28:56,955 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 176 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:28:56,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 1020 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-23 14:28:56,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-23 14:28:56,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 130. [2022-11-23 14:28:56,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 101 states have internal predecessors, (113), 20 states have call successors, (20), 8 states have call predecessors, (20), 12 states have return successors, (48), 20 states have call predecessors, (48), 19 states have call successors, (48) [2022-11-23 14:28:56,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 181 transitions. [2022-11-23 14:28:56,994 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 181 transitions. Word has length 74 [2022-11-23 14:28:56,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:28:56,994 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 181 transitions. [2022-11-23 14:28:56,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-23 14:28:56,995 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 181 transitions. [2022-11-23 14:28:56,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-23 14:28:56,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:28:56,998 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 14:28:57,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2022-11-23 14:28:57,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-11-23 14:28:57,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-11-23 14:28:57,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:28:57,602 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:28:57,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:28:57,602 INFO L85 PathProgramCache]: Analyzing trace with hash 359389810, now seen corresponding path program 1 times [2022-11-23 14:28:57,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:28:57,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841521955] [2022-11-23 14:28:57,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:28:57,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:28:57,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:28:57,604 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:28:57,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-23 14:28:57,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:28:57,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:28:57,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:28:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 14:28:57,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:28:57,779 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:28:57,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1841521955] [2022-11-23 14:28:57,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1841521955] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:28:57,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:28:57,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 14:28:57,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816302817] [2022-11-23 14:28:57,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:28:57,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:28:57,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:28:57,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:28:57,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:28:57,781 INFO L87 Difference]: Start difference. First operand 130 states and 181 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 14:28:57,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:28:57,906 INFO L93 Difference]: Finished difference Result 144 states and 196 transitions. [2022-11-23 14:28:57,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:28:57,910 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 74 [2022-11-23 14:28:57,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:28:57,911 INFO L225 Difference]: With dead ends: 144 [2022-11-23 14:28:57,911 INFO L226 Difference]: Without dead ends: 135 [2022-11-23 14:28:57,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:28:57,913 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 7 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:28:57,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 349 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:28:57,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-23 14:28:57,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 130. [2022-11-23 14:28:57,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 101 states have internal predecessors, (113), 20 states have call successors, (20), 8 states have call predecessors, (20), 12 states have return successors, (45), 20 states have call predecessors, (45), 19 states have call successors, (45) [2022-11-23 14:28:57,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 178 transitions. [2022-11-23 14:28:57,950 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 178 transitions. Word has length 74 [2022-11-23 14:28:57,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:28:57,950 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 178 transitions. [2022-11-23 14:28:57,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 14:28:57,951 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 178 transitions. [2022-11-23 14:28:57,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-23 14:28:57,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:28:57,954 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 14:28:57,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-23 14:28:58,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:28:58,165 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:28:58,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:28:58,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1455113153, now seen corresponding path program 2 times [2022-11-23 14:28:58,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:28:58,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1754944004] [2022-11-23 14:28:58,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:28:58,166 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:28:58,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:28:58,168 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:28:58,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-23 14:28:58,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:28:58,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:28:58,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 14:28:58,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:28:59,226 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 14:28:59,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:29:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:29:02,140 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:29:02,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1754944004] [2022-11-23 14:29:02,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1754944004] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:29:02,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1051298007] [2022-11-23 14:29:02,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:29:02,141 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:29:02,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:29:02,142 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:29:02,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-23 14:29:02,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:29:02,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:29:02,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 14:29:02,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:29:02,564 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 14:29:02,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:29:03,721 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:29:03,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1051298007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:29:03,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645153068] [2022-11-23 14:29:03,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:29:03,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:03,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:29:03,722 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:29:03,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-23 14:29:03,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:29:03,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:29:03,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 14:29:03,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:29:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 14:29:04,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:29:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:29:05,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645153068] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:29:05,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:29:05,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15, 16, 15, 16] total 28 [2022-11-23 14:29:05,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276305263] [2022-11-23 14:29:05,155 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:29:05,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-23 14:29:05,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:29:05,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-23 14:29:05,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2022-11-23 14:29:05,156 INFO L87 Difference]: Start difference. First operand 130 states and 178 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-23 14:29:10,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:29:10,627 INFO L93 Difference]: Finished difference Result 162 states and 213 transitions. [2022-11-23 14:29:10,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 14:29:10,629 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 74 [2022-11-23 14:29:10,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:29:10,630 INFO L225 Difference]: With dead ends: 162 [2022-11-23 14:29:10,630 INFO L226 Difference]: Without dead ends: 148 [2022-11-23 14:29:10,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 411 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=375, Invalid=1517, Unknown=0, NotChecked=0, Total=1892 [2022-11-23 14:29:10,632 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 242 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:29:10,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 1017 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-23 14:29:10,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-23 14:29:10,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 138. [2022-11-23 14:29:10,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 107 states have internal predecessors, (121), 21 states have call successors, (21), 9 states have call predecessors, (21), 12 states have return successors, (43), 21 states have call predecessors, (43), 20 states have call successors, (43) [2022-11-23 14:29:10,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 185 transitions. [2022-11-23 14:29:10,663 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 185 transitions. Word has length 74 [2022-11-23 14:29:10,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:29:10,663 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 185 transitions. [2022-11-23 14:29:10,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-23 14:29:10,664 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 185 transitions. [2022-11-23 14:29:10,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-23 14:29:10,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:29:10,665 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 14:29:10,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-11-23 14:29:10,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (51)] Ended with exit code 0 [2022-11-23 14:29:11,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Ended with exit code 0 [2022-11-23 14:29:11,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:29:11,272 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:29:11,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:29:11,272 INFO L85 PathProgramCache]: Analyzing trace with hash 2068625504, now seen corresponding path program 1 times [2022-11-23 14:29:11,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:29:11,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057817772] [2022-11-23 14:29:11,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:11,273 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:29:11,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:29:11,274 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:29:11,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-23 14:29:11,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:11,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 14:29:11,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:29:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:29:12,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:29:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:29:14,440 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:29:14,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057817772] [2022-11-23 14:29:14,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057817772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:29:14,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2053658939] [2022-11-23 14:29:14,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:14,441 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:29:14,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:29:14,443 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:29:14,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-23 14:29:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:14,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 14:29:14,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:29:14,845 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:29:14,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:29:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:29:15,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2053658939] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:29:15,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675604738] [2022-11-23 14:29:15,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:15,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:15,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:29:15,656 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:29:15,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-23 14:29:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:15,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 14:29:15,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:29:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 14:29:16,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:29:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 14:29:18,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675604738] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:29:18,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:29:18,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14, 15, 18, 19] total 39 [2022-11-23 14:29:18,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972421341] [2022-11-23 14:29:18,995 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:29:18,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-23 14:29:18,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:29:18,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-23 14:29:18,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1306, Unknown=0, NotChecked=0, Total=1482 [2022-11-23 14:29:18,997 INFO L87 Difference]: Start difference. First operand 138 states and 185 transitions. Second operand has 39 states, 37 states have (on average 2.135135135135135) internal successors, (79), 39 states have internal predecessors, (79), 13 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) [2022-11-23 14:29:26,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:29:26,833 INFO L93 Difference]: Finished difference Result 159 states and 207 transitions. [2022-11-23 14:29:26,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-23 14:29:26,835 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.135135135135135) internal successors, (79), 39 states have internal predecessors, (79), 13 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) Word has length 78 [2022-11-23 14:29:26,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:29:26,836 INFO L225 Difference]: With dead ends: 159 [2022-11-23 14:29:26,836 INFO L226 Difference]: Without dead ends: 130 [2022-11-23 14:29:26,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=530, Invalid=3010, Unknown=0, NotChecked=0, Total=3540 [2022-11-23 14:29:26,838 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 230 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:29:26,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 1182 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-23 14:29:26,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-23 14:29:26,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 123. [2022-11-23 14:29:26,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 92 states have (on average 1.1521739130434783) internal successors, (106), 95 states have internal predecessors, (106), 19 states have call successors, (19), 8 states have call predecessors, (19), 11 states have return successors, (37), 19 states have call predecessors, (37), 18 states have call successors, (37) [2022-11-23 14:29:26,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 162 transitions. [2022-11-23 14:29:26,864 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 162 transitions. Word has length 78 [2022-11-23 14:29:26,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:29:26,865 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 162 transitions. [2022-11-23 14:29:26,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.135135135135135) internal successors, (79), 39 states have internal predecessors, (79), 13 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) [2022-11-23 14:29:26,865 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 162 transitions. [2022-11-23 14:29:26,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-23 14:29:26,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:29:26,867 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 14:29:26,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 0 [2022-11-23 14:29:27,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-11-23 14:29:27,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Ended with exit code 0 [2022-11-23 14:29:27,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:29:27,470 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:29:27,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:29:27,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1678929915, now seen corresponding path program 1 times [2022-11-23 14:29:27,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:29:27,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1732310015] [2022-11-23 14:29:27,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:27,471 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:29:27,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:29:27,472 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:29:27,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-23 14:29:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:27,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-23 14:29:27,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:29:30,227 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:29:30,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:29:42,127 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:29:42,127 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:29:42,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1732310015] [2022-11-23 14:29:42,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1732310015] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:29:42,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1459613118] [2022-11-23 14:29:42,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:42,127 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:29:42,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:29:42,128 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:29:42,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-11-23 14:29:42,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:42,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-23 14:29:42,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:29:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:29:44,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:29:53,777 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:29:53,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1459613118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:29:53,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051231906] [2022-11-23 14:29:53,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:53,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:53,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:29:53,779 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:29:53,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-23 14:29:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:53,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-23 14:29:53,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:29:55,363 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 14:29:55,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:30:02,807 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 14:30:02,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051231906] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:30:02,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:30:02,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 18, 18, 24, 26] total 73 [2022-11-23 14:30:02,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908754089] [2022-11-23 14:30:02,809 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:30:02,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-23 14:30:02,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:30:02,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-23 14:30:02,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=627, Invalid=4629, Unknown=0, NotChecked=0, Total=5256 [2022-11-23 14:30:02,815 INFO L87 Difference]: Start difference. First operand 123 states and 162 transitions. Second operand has 73 states, 71 states have (on average 1.619718309859155) internal successors, (115), 70 states have internal predecessors, (115), 17 states have call successors, (20), 2 states have call predecessors, (20), 9 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) [2022-11-23 14:30:34,740 WARN L233 SmtUtils]: Spent 22.08s on a formula simplification. DAG size of input: 90 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:30:47,134 WARN L233 SmtUtils]: Spent 10.42s on a formula simplification. DAG size of input: 92 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:31:18,020 WARN L233 SmtUtils]: Spent 28.04s on a formula simplification. DAG size of input: 96 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:31:47,070 WARN L233 SmtUtils]: Spent 26.55s on a formula simplification. DAG size of input: 102 DAG size of output: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:31:56,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:31:56,018 INFO L93 Difference]: Finished difference Result 156 states and 201 transitions. [2022-11-23 14:31:56,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-23 14:31:56,020 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 71 states have (on average 1.619718309859155) internal successors, (115), 70 states have internal predecessors, (115), 17 states have call successors, (20), 2 states have call predecessors, (20), 9 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) Word has length 81 [2022-11-23 14:31:56,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:31:56,022 INFO L225 Difference]: With dead ends: 156 [2022-11-23 14:31:56,022 INFO L226 Difference]: Without dead ends: 143 [2022-11-23 14:31:56,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 407 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2187 ImplicationChecksByTransitivity, 127.5s TimeCoverageRelationStatistics Valid=1319, Invalid=8781, Unknown=0, NotChecked=0, Total=10100 [2022-11-23 14:31:56,025 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 373 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 2180 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 1788 SdHoareTripleChecker+Invalid, 2367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 2180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:31:56,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 1788 Invalid, 2367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 2180 Invalid, 0 Unknown, 0 Unchecked, 11.6s Time] [2022-11-23 14:31:56,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-23 14:31:56,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 127. [2022-11-23 14:31:56,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 97 states have internal predecessors, (109), 20 states have call successors, (20), 8 states have call predecessors, (20), 11 states have return successors, (36), 21 states have call predecessors, (36), 19 states have call successors, (36) [2022-11-23 14:31:56,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 165 transitions. [2022-11-23 14:31:56,056 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 165 transitions. Word has length 81 [2022-11-23 14:31:56,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:31:56,057 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 165 transitions. [2022-11-23 14:31:56,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 71 states have (on average 1.619718309859155) internal successors, (115), 70 states have internal predecessors, (115), 17 states have call successors, (20), 2 states have call predecessors, (20), 9 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) [2022-11-23 14:31:56,057 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 165 transitions. [2022-11-23 14:31:56,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-23 14:31:56,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:31:56,059 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 14:31:56,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-11-23 14:31:56,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2022-11-23 14:31:56,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-23 14:31:56,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:31:56,665 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:31:56,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:31:56,666 INFO L85 PathProgramCache]: Analyzing trace with hash -823382364, now seen corresponding path program 2 times [2022-11-23 14:31:56,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:31:56,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318704076] [2022-11-23 14:31:56,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:31:56,666 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:31:56,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:31:56,667 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:31:56,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-23 14:31:56,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:31:56,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:31:56,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 14:31:56,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:31:57,627 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:31:57,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:31:59,941 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:31:59,941 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:31:59,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318704076] [2022-11-23 14:31:59,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318704076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:31:59,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2053102943] [2022-11-23 14:31:59,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:31:59,942 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:31:59,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:31:59,943 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:31:59,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-23 14:32:00,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:32:00,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:32:00,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 14:32:00,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:32:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:32:00,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:32:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:32:01,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2053102943] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:32:01,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088594076] [2022-11-23 14:32:01,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:32:01,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:01,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:32:01,169 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:32:01,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-23 14:32:01,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:32:01,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:32:01,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 14:32:01,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:32:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 14:32:02,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:32:04,631 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 14:32:04,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088594076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:32:04,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:32:04,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14, 15, 18, 19] total 41 [2022-11-23 14:32:04,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898924007] [2022-11-23 14:32:04,632 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:32:04,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-23 14:32:04,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:32:04,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-23 14:32:04,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1446, Unknown=0, NotChecked=0, Total=1640 [2022-11-23 14:32:04,635 INFO L87 Difference]: Start difference. First operand 127 states and 165 transitions. Second operand has 41 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 41 states have internal predecessors, (82), 13 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) [2022-11-23 14:32:12,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:32:12,985 INFO L93 Difference]: Finished difference Result 150 states and 189 transitions. [2022-11-23 14:32:12,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-23 14:32:12,986 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 41 states have internal predecessors, (82), 13 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) Word has length 78 [2022-11-23 14:32:12,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:32:12,987 INFO L225 Difference]: With dead ends: 150 [2022-11-23 14:32:12,987 INFO L226 Difference]: Without dead ends: 121 [2022-11-23 14:32:12,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=616, Invalid=3544, Unknown=0, NotChecked=0, Total=4160 [2022-11-23 14:32:12,989 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 253 mSDsluCounter, 1174 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:32:12,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 1241 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-23 14:32:12,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-23 14:32:13,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 104. [2022-11-23 14:32:13,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 79 states have internal predecessors, (88), 17 states have call successors, (17), 6 states have call predecessors, (17), 10 states have return successors, (32), 18 states have call predecessors, (32), 16 states have call successors, (32) [2022-11-23 14:32:13,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 137 transitions. [2022-11-23 14:32:13,025 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 137 transitions. Word has length 78 [2022-11-23 14:32:13,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:32:13,026 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 137 transitions. [2022-11-23 14:32:13,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 41 states have internal predecessors, (82), 13 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) [2022-11-23 14:32:13,026 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 137 transitions. [2022-11-23 14:32:13,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-23 14:32:13,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:32:13,028 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 14:32:13,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-11-23 14:32:13,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Ended with exit code 0 [2022-11-23 14:32:13,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (60)] Forceful destruction successful, exit code 0 [2022-11-23 14:32:13,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:32:13,634 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:32:13,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:32:13,634 INFO L85 PathProgramCache]: Analyzing trace with hash -2063078729, now seen corresponding path program 2 times [2022-11-23 14:32:13,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:32:13,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1044943257] [2022-11-23 14:32:13,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:32:13,635 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:32:13,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:32:13,636 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:32:13,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-23 14:32:13,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:32:13,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:32:13,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-23 14:32:13,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:32:15,459 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:32:15,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:32:20,608 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:32:20,609 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:32:20,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1044943257] [2022-11-23 14:32:20,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1044943257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:32:20,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [475458830] [2022-11-23 14:32:20,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:32:20,609 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:32:20,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:32:20,613 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:32:20,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2022-11-23 14:32:20,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:32:20,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:32:20,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-23 14:32:20,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:32:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:32:21,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:32:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:32:22,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [475458830] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:32:22,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376447705] [2022-11-23 14:32:22,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:32:22,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:22,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:32:22,745 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:32:22,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-23 14:32:22,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:32:22,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:32:22,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-23 14:32:22,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:32:25,706 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:32:25,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:32:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:32:39,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376447705] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:32:39,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:32:39,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 22, 24] total 66 [2022-11-23 14:32:39,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759957647] [2022-11-23 14:32:39,571 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:32:39,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-23 14:32:39,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:32:39,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-23 14:32:39,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=3727, Unknown=0, NotChecked=0, Total=4290 [2022-11-23 14:32:39,573 INFO L87 Difference]: Start difference. First operand 104 states and 137 transitions. Second operand has 66 states, 64 states have (on average 1.625) internal successors, (104), 63 states have internal predecessors, (104), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-23 14:33:07,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:33:07,754 INFO L93 Difference]: Finished difference Result 152 states and 189 transitions. [2022-11-23 14:33:07,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-23 14:33:07,755 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 64 states have (on average 1.625) internal successors, (104), 63 states have internal predecessors, (104), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) Word has length 81 [2022-11-23 14:33:07,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:33:07,756 INFO L225 Difference]: With dead ends: 152 [2022-11-23 14:33:07,756 INFO L226 Difference]: Without dead ends: 131 [2022-11-23 14:33:07,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1997 ImplicationChecksByTransitivity, 37.7s TimeCoverageRelationStatistics Valid=1323, Invalid=7797, Unknown=0, NotChecked=0, Total=9120 [2022-11-23 14:33:07,760 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 380 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 1772 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 1408 SdHoareTripleChecker+Invalid, 1890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:33:07,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 1408 Invalid, 1890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1772 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2022-11-23 14:33:07,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-23 14:33:07,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 113. [2022-11-23 14:33:07,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 84 states have (on average 1.1547619047619047) internal successors, (97), 86 states have internal predecessors, (97), 18 states have call successors, (18), 7 states have call predecessors, (18), 10 states have return successors, (31), 19 states have call predecessors, (31), 17 states have call successors, (31) [2022-11-23 14:33:07,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 146 transitions. [2022-11-23 14:33:07,787 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 146 transitions. Word has length 81 [2022-11-23 14:33:07,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:33:07,788 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 146 transitions. [2022-11-23 14:33:07,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 64 states have (on average 1.625) internal successors, (104), 63 states have internal predecessors, (104), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-23 14:33:07,788 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 146 transitions. [2022-11-23 14:33:07,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-23 14:33:07,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:33:07,789 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 14:33:07,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-11-23 14:33:07,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (63)] Ended with exit code 0 [2022-11-23 14:33:08,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-11-23 14:33:08,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:33:08,396 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:33:08,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:33:08,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1451945505, now seen corresponding path program 1 times [2022-11-23 14:33:08,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:33:08,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494933877] [2022-11-23 14:33:08,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:08,397 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:33:08,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:33:08,398 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:33:08,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-23 14:33:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:08,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-23 14:33:08,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:33:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:33:11,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:33:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:33:19,241 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:33:19,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494933877] [2022-11-23 14:33:19,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494933877] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:33:19,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [715670124] [2022-11-23 14:33:19,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:19,242 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:33:19,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:33:19,243 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:33:19,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2022-11-23 14:33:19,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:19,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-23 14:33:19,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:33:21,872 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:33:21,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:33:27,198 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:33:27,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [715670124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:33:27,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125260988] [2022-11-23 14:33:27,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:27,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:27,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:33:27,199 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:33:27,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-11-23 14:33:27,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:27,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-23 14:33:27,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:33:28,401 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:33:28,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:33:32,239 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:33:32,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125260988] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:33:32,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:33:32,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 18, 17, 22, 24] total 63 [2022-11-23 14:33:32,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233789253] [2022-11-23 14:33:32,240 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:33:32,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-23 14:33:32,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:33:32,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-23 14:33:32,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=3524, Unknown=0, NotChecked=0, Total=3906 [2022-11-23 14:33:32,242 INFO L87 Difference]: Start difference. First operand 113 states and 146 transitions. Second operand has 63 states, 61 states have (on average 1.6557377049180328) internal successors, (101), 60 states have internal predecessors, (101), 16 states have call successors, (19), 2 states have call predecessors, (19), 8 states have return successors, (21), 17 states have call predecessors, (21), 15 states have call successors, (21) [2022-11-23 14:33:57,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:33:57,271 INFO L93 Difference]: Finished difference Result 156 states and 194 transitions. [2022-11-23 14:33:57,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-23 14:33:57,273 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 61 states have (on average 1.6557377049180328) internal successors, (101), 60 states have internal predecessors, (101), 16 states have call successors, (19), 2 states have call predecessors, (19), 8 states have return successors, (21), 17 states have call predecessors, (21), 15 states have call successors, (21) Word has length 79 [2022-11-23 14:33:57,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:33:57,274 INFO L225 Difference]: With dead ends: 156 [2022-11-23 14:33:57,274 INFO L226 Difference]: Without dead ends: 135 [2022-11-23 14:33:57,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 404 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=1334, Invalid=8968, Unknown=0, NotChecked=0, Total=10302 [2022-11-23 14:33:57,276 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 294 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 2204 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 1562 SdHoareTripleChecker+Invalid, 2387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 2204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:33:57,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 1562 Invalid, 2387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 2204 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2022-11-23 14:33:57,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-23 14:33:57,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 123. [2022-11-23 14:33:57,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 93 states have (on average 1.1505376344086022) internal successors, (107), 94 states have internal predecessors, (107), 19 states have call successors, (19), 8 states have call predecessors, (19), 10 states have return successors, (30), 20 states have call predecessors, (30), 18 states have call successors, (30) [2022-11-23 14:33:57,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 156 transitions. [2022-11-23 14:33:57,304 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 156 transitions. Word has length 79 [2022-11-23 14:33:57,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:33:57,305 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 156 transitions. [2022-11-23 14:33:57,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 61 states have (on average 1.6557377049180328) internal successors, (101), 60 states have internal predecessors, (101), 16 states have call successors, (19), 2 states have call predecessors, (19), 8 states have return successors, (21), 17 states have call predecessors, (21), 15 states have call successors, (21) [2022-11-23 14:33:57,305 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 156 transitions. [2022-11-23 14:33:57,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-23 14:33:57,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:33:57,307 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 14:33:57,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-23 14:33:57,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-11-23 14:33:57,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (66)] Forceful destruction successful, exit code 0 [2022-11-23 14:33:57,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:33:57,919 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:33:57,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:33:57,919 INFO L85 PathProgramCache]: Analyzing trace with hash -476190709, now seen corresponding path program 1 times [2022-11-23 14:33:57,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:33:57,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3867009] [2022-11-23 14:33:57,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:57,920 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:33:57,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:33:57,921 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:33:57,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-23 14:33:58,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:58,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:33:58,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:33:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:33:58,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:33:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:33:58,515 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:33:58,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [3867009] [2022-11-23 14:33:58,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [3867009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:33:58,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [37538191] [2022-11-23 14:33:58,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:58,516 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:33:58,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:33:58,518 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:33:58,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (69)] Waiting until timeout for monitored process [2022-11-23 14:33:58,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:58,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:33:58,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:33:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:33:58,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:33:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:33:58,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [37538191] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:33:58,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804521535] [2022-11-23 14:33:58,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:58,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:58,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:33:58,965 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:33:58,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-11-23 14:33:59,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:59,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:33:59,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:33:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:33:59,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:33:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:33:59,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804521535] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:33:59,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:33:59,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 15 [2022-11-23 14:33:59,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632317389] [2022-11-23 14:33:59,387 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:33:59,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 14:33:59,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:33:59,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 14:33:59,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-23 14:33:59,389 INFO L87 Difference]: Start difference. First operand 123 states and 156 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-23 14:34:00,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:34:00,152 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2022-11-23 14:34:00,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 14:34:00,153 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 82 [2022-11-23 14:34:00,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:34:00,154 INFO L225 Difference]: With dead ends: 132 [2022-11-23 14:34:00,154 INFO L226 Difference]: Without dead ends: 119 [2022-11-23 14:34:00,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-11-23 14:34:00,155 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 131 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:34:00,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 666 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:34:00,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-23 14:34:00,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-11-23 14:34:00,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 90 states have (on average 1.1555555555555554) internal successors, (104), 92 states have internal predecessors, (104), 18 states have call successors, (18), 7 states have call predecessors, (18), 10 states have return successors, (28), 19 states have call predecessors, (28), 17 states have call successors, (28) [2022-11-23 14:34:00,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 150 transitions. [2022-11-23 14:34:00,180 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 150 transitions. Word has length 82 [2022-11-23 14:34:00,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:34:00,180 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 150 transitions. [2022-11-23 14:34:00,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-23 14:34:00,181 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 150 transitions. [2022-11-23 14:34:00,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-23 14:34:00,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:34:00,182 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 14:34:00,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (69)] Forceful destruction successful, exit code 0 [2022-11-23 14:34:00,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-11-23 14:34:00,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-11-23 14:34:00,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:34:00,786 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:34:00,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:34:00,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1133603807, now seen corresponding path program 2 times [2022-11-23 14:34:00,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:34:00,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542989558] [2022-11-23 14:34:00,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:34:00,787 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:34:00,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:34:00,788 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:34:00,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-23 14:34:00,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:34:00,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:34:00,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-23 14:34:00,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:34:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:34:02,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:34:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:34:07,500 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:34:07,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542989558] [2022-11-23 14:34:07,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542989558] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:34:07,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1093196621] [2022-11-23 14:34:07,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:34:07,501 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:34:07,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:34:07,502 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:34:07,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2022-11-23 14:34:07,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:34:07,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:34:07,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-23 14:34:07,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:34:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:34:08,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:34:09,525 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:34:09,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1093196621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:34:09,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044198638] [2022-11-23 14:34:09,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:34:09,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:34:09,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:34:09,535 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:34:09,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-23 14:34:09,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:34:09,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:34:09,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-23 14:34:09,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:34:13,119 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:34:13,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:34:19,845 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:34:19,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044198638] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:34:19,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:34:19,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 22, 24] total 58 [2022-11-23 14:34:19,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990786638] [2022-11-23 14:34:19,846 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:34:19,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-23 14:34:19,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:34:19,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-23 14:34:19,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=2974, Unknown=0, NotChecked=0, Total=3306 [2022-11-23 14:34:19,848 INFO L87 Difference]: Start difference. First operand 119 states and 150 transitions. Second operand has 58 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 55 states have internal predecessors, (94), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-23 14:34:44,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:34:44,531 INFO L93 Difference]: Finished difference Result 162 states and 198 transitions. [2022-11-23 14:34:44,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-23 14:34:44,533 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 55 states have internal predecessors, (94), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) Word has length 79 [2022-11-23 14:34:44,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:34:44,534 INFO L225 Difference]: With dead ends: 162 [2022-11-23 14:34:44,534 INFO L226 Difference]: Without dead ends: 138 [2022-11-23 14:34:44,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 411 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2109 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=1220, Invalid=8286, Unknown=0, NotChecked=0, Total=9506 [2022-11-23 14:34:44,536 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 291 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 1913 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 2077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:34:44,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 1358 Invalid, 2077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1913 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2022-11-23 14:34:44,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-23 14:34:44,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 118. [2022-11-23 14:34:44,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 90 states have (on average 1.1444444444444444) internal successors, (103), 90 states have internal predecessors, (103), 18 states have call successors, (18), 8 states have call predecessors, (18), 9 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2022-11-23 14:34:44,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 147 transitions. [2022-11-23 14:34:44,567 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 147 transitions. Word has length 79 [2022-11-23 14:34:44,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:34:44,567 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 147 transitions. [2022-11-23 14:34:44,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 55 states have internal predecessors, (94), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-23 14:34:44,568 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 147 transitions. [2022-11-23 14:34:44,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-23 14:34:44,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:34:44,569 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 14:34:44,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2022-11-23 14:34:44,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (72)] Forceful destruction successful, exit code 0 [2022-11-23 14:34:44,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-11-23 14:34:45,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:34:45,182 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:34:45,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:34:45,182 INFO L85 PathProgramCache]: Analyzing trace with hash -514341681, now seen corresponding path program 2 times [2022-11-23 14:34:45,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:34:45,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537421127] [2022-11-23 14:34:45,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:34:45,183 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:34:45,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:34:45,184 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:34:45,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-23 14:34:45,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:34:45,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:34:45,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:34:45,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:34:45,470 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:34:45,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:34:45,811 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:34:45,811 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:34:45,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537421127] [2022-11-23 14:34:45,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [537421127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:34:45,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2113555413] [2022-11-23 14:34:45,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:34:45,812 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:34:45,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:34:45,813 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:34:45,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-11-23 14:34:45,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:34:45,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:34:45,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:34:45,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:34:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:34:46,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:34:46,299 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:34:46,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2113555413] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:34:46,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589096433] [2022-11-23 14:34:46,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:34:46,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:34:46,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:34:46,300 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:34:46,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-23 14:34:46,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:34:46,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:34:46,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:34:46,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:34:46,501 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:34:46,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:34:46,766 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:34:46,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589096433] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:34:46,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:34:46,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 15 [2022-11-23 14:34:46,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290293527] [2022-11-23 14:34:46,767 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:34:46,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 14:34:46,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:34:46,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 14:34:46,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-23 14:34:46,768 INFO L87 Difference]: Start difference. First operand 118 states and 147 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-23 14:34:47,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:34:47,390 INFO L93 Difference]: Finished difference Result 125 states and 153 transitions. [2022-11-23 14:34:47,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 14:34:47,390 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 82 [2022-11-23 14:34:47,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:34:47,391 INFO L225 Difference]: With dead ends: 125 [2022-11-23 14:34:47,392 INFO L226 Difference]: Without dead ends: 102 [2022-11-23 14:34:47,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2022-11-23 14:34:47,392 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 131 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:34:47,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 646 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:34:47,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-23 14:34:47,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2022-11-23 14:34:47,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 15 states have call successors, (15), 7 states have call predecessors, (15), 8 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2022-11-23 14:34:47,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2022-11-23 14:34:47,415 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 82 [2022-11-23 14:34:47,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:34:47,416 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2022-11-23 14:34:47,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-23 14:34:47,416 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2022-11-23 14:34:47,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-23 14:34:47,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:34:47,417 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 14:34:47,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (75)] Ended with exit code 0 [2022-11-23 14:34:47,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-23 14:34:47,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-11-23 14:34:48,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:34:48,020 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:34:48,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:34:48,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1357497146, now seen corresponding path program 1 times [2022-11-23 14:34:48,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:34:48,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335374011] [2022-11-23 14:34:48,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:48,021 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:34:48,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:34:48,023 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:34:48,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-23 14:34:48,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:48,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-23 14:34:48,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:34:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 14:34:51,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:35:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-23 14:35:04,230 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:35:04,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335374011] [2022-11-23 14:35:04,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335374011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:35:04,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [50037897] [2022-11-23 14:35:04,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:04,231 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:35:04,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:35:04,234 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:35:04,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (78)] Waiting until timeout for monitored process [2022-11-23 14:35:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:04,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-23 14:35:04,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:35:05,488 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 14:35:05,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:35:08,028 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-23 14:35:08,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [50037897] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:35:08,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834132793] [2022-11-23 14:35:08,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:08,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:35:08,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:35:08,035 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:35:08,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-11-23 14:35:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:08,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-23 14:35:08,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:35:10,254 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 14:35:10,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:35:17,138 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 14:35:17,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834132793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:35:17,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:35:17,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 24, 23, 26, 25] total 52 [2022-11-23 14:35:17,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841623993] [2022-11-23 14:35:17,139 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:35:17,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-23 14:35:17,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:35:17,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-23 14:35:17,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=2405, Unknown=0, NotChecked=0, Total=2652 [2022-11-23 14:35:17,140 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand has 52 states, 50 states have (on average 1.6) internal successors, (80), 48 states have internal predecessors, (80), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2022-11-23 14:35:51,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:51,545 INFO L93 Difference]: Finished difference Result 111 states and 133 transitions. [2022-11-23 14:35:51,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-23 14:35:51,547 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 1.6) internal successors, (80), 48 states have internal predecessors, (80), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) Word has length 84 [2022-11-23 14:35:51,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:51,548 INFO L225 Difference]: With dead ends: 111 [2022-11-23 14:35:51,548 INFO L226 Difference]: Without dead ends: 104 [2022-11-23 14:35:51,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 446 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 37.8s TimeCoverageRelationStatistics Valid=710, Invalid=5770, Unknown=0, NotChecked=0, Total=6480 [2022-11-23 14:35:51,549 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 180 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:51,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 1114 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1385 Invalid, 0 Unknown, 0 Unchecked, 13.2s Time] [2022-11-23 14:35:51,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-23 14:35:51,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2022-11-23 14:35:51,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 15 states have call successors, (15), 7 states have call predecessors, (15), 8 states have return successors, (20), 15 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-23 14:35:51,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2022-11-23 14:35:51,572 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 84 [2022-11-23 14:35:51,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:51,573 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2022-11-23 14:35:51,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 1.6) internal successors, (80), 48 states have internal predecessors, (80), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2022-11-23 14:35:51,573 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2022-11-23 14:35:51,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-23 14:35:51,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:51,574 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 14:35:51,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-23 14:35:51,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (78)] Ended with exit code 0 [2022-11-23 14:35:51,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-11-23 14:35:52,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:35:52,188 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:52,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:52,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1014343994, now seen corresponding path program 2 times [2022-11-23 14:35:52,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:35:52,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [112921765] [2022-11-23 14:35:52,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:35:52,189 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:35:52,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:35:52,190 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:35:52,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-23 14:35:52,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:35:52,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:35:52,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-23 14:35:52,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:35:56,221 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 14:35:56,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:36:08,016 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-23 14:36:08,016 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:36:08,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [112921765] [2022-11-23 14:36:08,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [112921765] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:36:08,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1170206252] [2022-11-23 14:36:08,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:36:08,016 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:36:08,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:36:08,020 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:36:08,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (81)] Waiting until timeout for monitored process [2022-11-23 14:36:08,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:36:08,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:36:08,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-23 14:36:08,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:36:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 14:36:09,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:36:11,745 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-23 14:36:11,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1170206252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:36:11,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444306915] [2022-11-23 14:36:11,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:36:11,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:36:11,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:36:11,746 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:36:11,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-11-23 14:36:12,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:36:12,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:36:12,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-23 14:36:12,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:36:13,731 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 14:36:13,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:36:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 14:36:19,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444306915] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:36:19,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:36:19,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 24, 23, 26, 25] total 52 [2022-11-23 14:36:19,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611646834] [2022-11-23 14:36:19,765 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:36:19,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-23 14:36:19,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:36:19,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-23 14:36:19,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2412, Unknown=0, NotChecked=0, Total=2652 [2022-11-23 14:36:19,766 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand has 52 states, 50 states have (on average 1.6) internal successors, (80), 48 states have internal predecessors, (80), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2022-11-23 14:36:37,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 14:36:50,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:36:50,353 INFO L93 Difference]: Finished difference Result 108 states and 129 transitions. [2022-11-23 14:36:50,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-23 14:36:50,355 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 1.6) internal successors, (80), 48 states have internal predecessors, (80), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) Word has length 84 [2022-11-23 14:36:50,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:36:50,356 INFO L225 Difference]: With dead ends: 108 [2022-11-23 14:36:50,356 INFO L226 Difference]: Without dead ends: 101 [2022-11-23 14:36:50,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 447 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 34.0s TimeCoverageRelationStatistics Valid=655, Invalid=5507, Unknown=0, NotChecked=0, Total=6162 [2022-11-23 14:36:50,377 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 222 mSDsluCounter, 1057 mSDsCounter, 0 mSdLazyCounter, 1411 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1105 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:36:50,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 1105 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1411 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time] [2022-11-23 14:36:50,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-23 14:36:50,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2022-11-23 14:36:50,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.1470588235294117) internal successors, (78), 70 states have internal predecessors, (78), 15 states have call successors, (15), 7 states have call predecessors, (15), 8 states have return successors, (19), 14 states have call predecessors, (19), 14 states have call successors, (19) [2022-11-23 14:36:50,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2022-11-23 14:36:50,411 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 84 [2022-11-23 14:36:50,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:36:50,411 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2022-11-23 14:36:50,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 1.6) internal successors, (80), 48 states have internal predecessors, (80), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2022-11-23 14:36:50,412 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2022-11-23 14:36:50,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-23 14:36:50,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:36:50,414 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 14:36:50,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Forceful destruction successful, exit code 0 [2022-11-23 14:36:50,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-11-23 14:36:50,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (81)] Ended with exit code 0 [2022-11-23 14:36:51,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:36:51,034 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:36:51,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:36:51,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1930237036, now seen corresponding path program 1 times [2022-11-23 14:36:51,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:36:51,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1081944034] [2022-11-23 14:36:51,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:51,035 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:36:51,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:36:51,036 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:36:51,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-23 14:36:51,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:51,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-23 14:36:51,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:36:52,562 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 14:36:52,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:36:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-23 14:36:56,479 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:36:56,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1081944034] [2022-11-23 14:36:56,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1081944034] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:36:56,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1875704625] [2022-11-23 14:36:56,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:56,480 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:36:56,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:36:56,481 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:36:56,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (84)] Waiting until timeout for monitored process [2022-11-23 14:36:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:56,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 14:36:56,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:36:57,466 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 14:36:57,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:36:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-23 14:36:59,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1875704625] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:36:59,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367889932] [2022-11-23 14:36:59,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:59,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:36:59,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:36:59,871 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:36:59,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-11-23 14:37:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:37:00,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-23 14:37:00,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:37:04,764 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 14:37:04,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:37:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-23 14:37:06,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367889932] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:37:06,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:37:06,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17, 17, 22, 16] total 50 [2022-11-23 14:37:06,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927514048] [2022-11-23 14:37:06,630 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:37:06,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-23 14:37:06,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:37:06,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-23 14:37:06,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2171, Unknown=0, NotChecked=0, Total=2450 [2022-11-23 14:37:06,632 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand has 50 states, 50 states have (on average 1.8) internal successors, (90), 49 states have internal predecessors, (90), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (19), 15 states have call predecessors, (19), 13 states have call successors, (19) [2022-11-23 14:37:19,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:37:19,320 INFO L93 Difference]: Finished difference Result 119 states and 142 transitions. [2022-11-23 14:37:19,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-23 14:37:19,322 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.8) internal successors, (90), 49 states have internal predecessors, (90), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (19), 15 states have call predecessors, (19), 13 states have call successors, (19) Word has length 85 [2022-11-23 14:37:19,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:37:19,325 INFO L225 Difference]: With dead ends: 119 [2022-11-23 14:37:19,325 INFO L226 Difference]: Without dead ends: 88 [2022-11-23 14:37:19,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1589 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=798, Invalid=5364, Unknown=0, NotChecked=0, Total=6162 [2022-11-23 14:37:19,326 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 160 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:37:19,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 710 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-11-23 14:37:19,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-23 14:37:19,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2022-11-23 14:37:19,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 64 states have internal predecessors, (71), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2022-11-23 14:37:19,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2022-11-23 14:37:19,364 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 85 [2022-11-23 14:37:19,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:37:19,364 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2022-11-23 14:37:19,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.8) internal successors, (90), 49 states have internal predecessors, (90), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (19), 15 states have call predecessors, (19), 13 states have call successors, (19) [2022-11-23 14:37:19,365 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2022-11-23 14:37:19,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-23 14:37:19,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:37:19,366 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 14:37:19,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Forceful destruction successful, exit code 0 [2022-11-23 14:37:19,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (84)] Ended with exit code 0 [2022-11-23 14:37:19,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-11-23 14:37:19,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:37:19,981 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:37:19,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:37:19,981 INFO L85 PathProgramCache]: Analyzing trace with hash 117576084, now seen corresponding path program 2 times [2022-11-23 14:37:19,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:37:19,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [192904706] [2022-11-23 14:37:19,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:37:19,982 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:37:19,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:37:19,983 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:37:19,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-23 14:37:20,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:37:20,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:37:20,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-23 14:37:20,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:37:21,450 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 14:37:21,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:37:25,735 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-23 14:37:25,735 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:37:25,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [192904706] [2022-11-23 14:37:25,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [192904706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:37:25,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1280303037] [2022-11-23 14:37:25,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:37:25,735 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:37:25,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:37:25,736 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:37:25,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (87)] Waiting until timeout for monitored process [2022-11-23 14:37:25,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:37:25,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:37:25,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 14:37:25,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:37:26,621 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 14:37:26,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:37:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-23 14:37:29,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1280303037] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:37:29,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079953171] [2022-11-23 14:37:29,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:37:29,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:37:29,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:37:29,334 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:37:29,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-11-23 14:37:29,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:37:29,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:37:29,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-23 14:37:29,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:37:30,078 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 14:37:30,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:37:31,493 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-23 14:37:31,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079953171] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:37:31,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:37:31,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17, 17, 17, 16] total 35 [2022-11-23 14:37:31,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70232257] [2022-11-23 14:37:31,494 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:37:31,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-23 14:37:31,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:37:31,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-23 14:37:31,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1047, Unknown=0, NotChecked=0, Total=1190 [2022-11-23 14:37:31,495 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 12 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-23 14:37:42,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:37:42,756 INFO L93 Difference]: Finished difference Result 105 states and 123 transitions. [2022-11-23 14:37:42,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-23 14:37:42,757 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 12 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) Word has length 85 [2022-11-23 14:37:42,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:37:42,758 INFO L225 Difference]: With dead ends: 105 [2022-11-23 14:37:42,758 INFO L226 Difference]: Without dead ends: 74 [2022-11-23 14:37:42,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=546, Invalid=2994, Unknown=0, NotChecked=0, Total=3540 [2022-11-23 14:37:42,760 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 152 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:37:42,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 879 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-23 14:37:42,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-23 14:37:42,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-23 14:37:42,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 58 states have internal predecessors, (64), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2022-11-23 14:37:42,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2022-11-23 14:37:42,786 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 85 [2022-11-23 14:37:42,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:37:42,787 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2022-11-23 14:37:42,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 12 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-23 14:37:42,787 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2022-11-23 14:37:42,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-23 14:37:42,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:37:42,788 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 14:37:42,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Ended with exit code 0 [2022-11-23 14:37:43,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-11-23 14:37:43,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (87)] Forceful destruction successful, exit code 0 [2022-11-23 14:37:43,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:37:43,401 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:37:43,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:37:43,402 INFO L85 PathProgramCache]: Analyzing trace with hash 608590994, now seen corresponding path program 1 times [2022-11-23 14:37:43,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:37:43,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [383438376] [2022-11-23 14:37:43,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:37:43,402 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:37:43,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:37:43,403 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:37:43,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-23 14:37:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:37:44,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-23 14:37:44,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:37:48,302 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 14:37:48,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:38:02,862 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-23 14:38:02,862 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:38:02,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [383438376] [2022-11-23 14:38:02,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [383438376] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:38:02,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2002359107] [2022-11-23 14:38:02,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:38:02,863 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:38:02,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:38:02,864 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:38:02,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (90)] Waiting until timeout for monitored process [2022-11-23 14:38:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:38:03,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-23 14:38:03,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:38:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 14:38:07,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:38:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-23 14:38:15,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2002359107] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:38:15,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760727056] [2022-11-23 14:38:15,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:38:15,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:38:15,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:38:15,968 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:38:15,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-11-23 14:38:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:38:16,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-23 14:38:16,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:38:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 14:38:20,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:38:43,922 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 14:38:43,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760727056] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:38:43,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:38:43,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26, 25, 28, 28] total 91 [2022-11-23 14:38:43,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141976096] [2022-11-23 14:38:43,924 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:38:43,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-11-23 14:38:43,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:38:43,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-11-23 14:38:43,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=7722, Unknown=0, NotChecked=0, Total=8190 [2022-11-23 14:38:43,926 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand has 91 states, 86 states have (on average 1.430232558139535) internal successors, (123), 83 states have internal predecessors, (123), 21 states have call successors, (24), 2 states have call predecessors, (24), 10 states have return successors, (28), 23 states have call predecessors, (28), 20 states have call successors, (28) [2022-11-23 14:39:34,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:39:34,180 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2022-11-23 14:39:34,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-23 14:39:34,182 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 86 states have (on average 1.430232558139535) internal successors, (123), 83 states have internal predecessors, (123), 21 states have call successors, (24), 2 states have call predecessors, (24), 10 states have return successors, (28), 23 states have call predecessors, (28), 20 states have call successors, (28) Word has length 86 [2022-11-23 14:39:34,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:39:34,182 INFO L225 Difference]: With dead ends: 86 [2022-11-23 14:39:34,182 INFO L226 Difference]: Without dead ends: 75 [2022-11-23 14:39:34,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 420 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3030 ImplicationChecksByTransitivity, 81.2s TimeCoverageRelationStatistics Valid=1059, Invalid=12050, Unknown=1, NotChecked=0, Total=13110 [2022-11-23 14:39:34,185 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 197 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 1934 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1777 SdHoareTripleChecker+Invalid, 2057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:39:34,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 1777 Invalid, 2057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1934 Invalid, 0 Unknown, 0 Unchecked, 16.1s Time] [2022-11-23 14:39:34,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-23 14:39:34,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-11-23 14:39:34,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 58 states have internal predecessors, (65), 10 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-11-23 14:39:34,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2022-11-23 14:39:34,205 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 86 [2022-11-23 14:39:34,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:39:34,205 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2022-11-23 14:39:34,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 86 states have (on average 1.430232558139535) internal successors, (123), 83 states have internal predecessors, (123), 21 states have call successors, (24), 2 states have call predecessors, (24), 10 states have return successors, (28), 23 states have call predecessors, (28), 20 states have call successors, (28) [2022-11-23 14:39:34,206 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2022-11-23 14:39:34,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-23 14:39:34,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:39:34,207 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 14:39:34,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-11-23 14:39:34,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Forceful destruction successful, exit code 0 [2022-11-23 14:39:34,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (90)] Forceful destruction successful, exit code 0 [2022-11-23 14:39:34,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:39:34,814 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:39:34,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:39:34,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1561964758, now seen corresponding path program 2 times [2022-11-23 14:39:34,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:39:34,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731318029] [2022-11-23 14:39:34,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:39:34,815 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:39:34,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:39:34,816 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:39:34,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-23 14:39:35,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:39:35,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:39:35,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-23 14:39:35,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:39:40,017 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 14:39:40,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:39:54,558 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-23 14:39:54,558 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:39:54,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731318029] [2022-11-23 14:39:54,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731318029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:39:54,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1541344752] [2022-11-23 14:39:54,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:39:54,559 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:39:54,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:39:54,560 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:39:54,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (93)] Waiting until timeout for monitored process [2022-11-23 14:39:54,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:39:54,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:39:54,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-23 14:39:54,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:39:59,526 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 14:39:59,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:40:06,899 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-23 14:40:06,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1541344752] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:40:06,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72570349] [2022-11-23 14:40:06,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:40:06,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:40:06,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:40:06,901 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:40:06,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-11-23 14:40:07,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:40:07,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:40:07,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-23 14:40:07,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:40:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 14:40:09,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:40:17,842 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 14:40:17,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72570349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:40:17,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:40:17,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26, 25, 28, 28] total 71 [2022-11-23 14:40:17,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809984140] [2022-11-23 14:40:17,843 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:40:17,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-23 14:40:17,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:40:17,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-23 14:40:17,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=4624, Unknown=0, NotChecked=0, Total=4970 [2022-11-23 14:40:17,845 INFO L87 Difference]: Start difference. First operand 74 states and 86 transitions. Second operand has 71 states, 67 states have (on average 1.507462686567164) internal successors, (101), 65 states have internal predecessors, (101), 17 states have call successors, (20), 2 states have call predecessors, (20), 7 states have return successors, (22), 18 states have call predecessors, (22), 16 states have call successors, (22) [2022-11-23 14:40:55,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:55,910 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2022-11-23 14:40:55,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-23 14:40:55,913 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 67 states have (on average 1.507462686567164) internal successors, (101), 65 states have internal predecessors, (101), 17 states have call successors, (20), 2 states have call predecessors, (20), 7 states have return successors, (22), 18 states have call predecessors, (22), 16 states have call successors, (22) Word has length 86 [2022-11-23 14:40:55,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:55,913 INFO L225 Difference]: With dead ends: 74 [2022-11-23 14:40:55,913 INFO L226 Difference]: Without dead ends: 0 [2022-11-23 14:40:55,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 439 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 57.6s TimeCoverageRelationStatistics Valid=805, Invalid=7751, Unknown=0, NotChecked=0, Total=8556 [2022-11-23 14:40:55,915 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 175 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:55,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 1270 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1293 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2022-11-23 14:40:55,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-23 14:40:55,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-23 14:40:55,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:40:55,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-23 14:40:55,916 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 86 [2022-11-23 14:40:55,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:55,916 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-23 14:40:55,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 67 states have (on average 1.507462686567164) internal successors, (101), 65 states have internal predecessors, (101), 17 states have call successors, (20), 2 states have call predecessors, (20), 7 states have return successors, (22), 18 states have call predecessors, (22), 16 states have call successors, (22) [2022-11-23 14:40:55,916 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-23 14:40:55,916 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-23 14:40:55,919 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-23 14:40:55,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (93)] Forceful destruction successful, exit code 0 [2022-11-23 14:40:56,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-11-23 14:40:56,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Forceful destruction successful, exit code 0 [2022-11-23 14:40:56,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e40c1e94-7467-44d8-8f5b-8ee4f2b77706/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:40:56,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.