./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur --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 64bit --witnessprinter.graph.data.programhash 204d10239a0b36d2351863a85d337d8394fa6f65e7ffe92c9fae442e87993f63 --- 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-38b53e6 [2022-11-26 01:09:12,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:09:12,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:09:12,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:09:12,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:09:12,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:09:12,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:09:12,342 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:09:12,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:09:12,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:09:12,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:09:12,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:09:12,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:09:12,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:09:12,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:09:12,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:09:12,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:09:12,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:09:12,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:09:12,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:09:12,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:09:12,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:09:12,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:09:12,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:09:12,372 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:09:12,375 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:09:12,376 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:09:12,377 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:09:12,382 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:09:12,383 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:09:12,383 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:09:12,384 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:09:12,385 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:09:12,387 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:09:12,388 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:09:12,390 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:09:12,391 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:09:12,392 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:09:12,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:09:12,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:09:12,396 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:09:12,397 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-26 01:09:12,425 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:09:12,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:09:12,432 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:09:12,432 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:09:12,433 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:09:12,433 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:09:12,433 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:09:12,433 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:09:12,434 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:09:12,434 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 01:09:12,435 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:09:12,435 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:09:12,435 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 01:09:12,436 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 01:09:12,436 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:09:12,436 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 01:09:12,436 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 01:09:12,436 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 01:09:12,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:09:12,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:09:12,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:09:12,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 01:09:12,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:09:12,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 01:09:12,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 01:09:12,439 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:09:12,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 01:09:12,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:09:12,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:09:12,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:09:12,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:09:12,440 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 01:09:12,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:09:12,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 01:09:12,441 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 01:09:12,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 01:09:12,441 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 01:09:12,441 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:09:12,442 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_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 204d10239a0b36d2351863a85d337d8394fa6f65e7ffe92c9fae442e87993f63 [2022-11-26 01:09:12,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:09:12,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:09:12,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:09:12,788 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:09:12,789 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:09:12,790 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c [2022-11-26 01:09:15,866 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:09:16,248 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:09:16,249 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c [2022-11-26 01:09:16,276 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/data/94a7297e9/3086c493bb184dfc915a6c51cbe1fa9a/FLAGc19fb9d33 [2022-11-26 01:09:16,294 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/data/94a7297e9/3086c493bb184dfc915a6c51cbe1fa9a [2022-11-26 01:09:16,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:09:16,300 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:09:16,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:09:16,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:09:16,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:09:16,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:09:16" (1/1) ... [2022-11-26 01:09:16,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e5b0130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:16, skipping insertion in model container [2022-11-26 01:09:16,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:09:16" (1/1) ... [2022-11-26 01:09:16,318 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:09:16,415 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:09:16,654 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_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c[1107,1120] [2022-11-26 01:09:17,220 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:09:17,253 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:09:17,265 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_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c[1107,1120] [2022-11-26 01:09:17,516 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:09:17,530 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:09:17,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:17 WrapperNode [2022-11-26 01:09:17,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:09:17,534 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:09:17,534 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:09:17,534 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:09:17,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:17" (1/1) ... [2022-11-26 01:09:17,599 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:17" (1/1) ... [2022-11-26 01:09:17,730 INFO L138 Inliner]: procedures = 11, calls = 6, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2431 [2022-11-26 01:09:17,737 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:09:17,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:09:17,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:09:17,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:09:17,750 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:17" (1/1) ... [2022-11-26 01:09:17,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:17" (1/1) ... [2022-11-26 01:09:17,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:17" (1/1) ... [2022-11-26 01:09:17,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:17" (1/1) ... [2022-11-26 01:09:17,838 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:17" (1/1) ... [2022-11-26 01:09:17,861 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:17" (1/1) ... [2022-11-26 01:09:17,871 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:17" (1/1) ... [2022-11-26 01:09:17,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:17" (1/1) ... [2022-11-26 01:09:17,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:09:17,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:09:17,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:09:17,914 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:09:17,915 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:17" (1/1) ... [2022-11-26 01:09:17,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:09:17,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:09:17,952 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:09:17,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:09:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:09:18,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:09:18,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-26 01:09:18,002 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-26 01:09:18,538 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:09:18,540 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:12:28,602 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:12:28,639 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:12:28,640 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 01:12:28,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:12:28 BoogieIcfgContainer [2022-11-26 01:12:28,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:12:28,644 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:12:28,645 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:12:28,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:12:28,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:09:16" (1/3) ... [2022-11-26 01:12:28,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df27764 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:12:28, skipping insertion in model container [2022-11-26 01:12:28,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:17" (2/3) ... [2022-11-26 01:12:28,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df27764 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:12:28, skipping insertion in model container [2022-11-26 01:12:28,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:12:28" (3/3) ... [2022-11-26 01:12:28,651 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.h_Vsa16.c [2022-11-26 01:12:28,670 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:12:28,670 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 01:12:28,733 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:12:28,740 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;@7cdaf2c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:12:28,740 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 01:12:28,745 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 01:12:28,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 01:12:28,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:28,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 01:12:28,754 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:28,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:28,761 INFO L85 PathProgramCache]: Analyzing trace with hash -2051499341, now seen corresponding path program 1 times [2022-11-26 01:12:28,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:28,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882411263] [2022-11-26 01:12:28,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:28,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 01:12:29,061 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-26 01:12:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 01:12:29,275 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-26 01:12:29,277 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-26 01:12:29,278 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-26 01:12:29,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 01:12:29,285 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2022-11-26 01:12:29,289 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-26 01:12:29,347 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-26 01:12:29,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 01:12:29 BoogieIcfgContainer [2022-11-26 01:12:29,364 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-26 01:12:29,364 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-26 01:12:29,364 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-26 01:12:29,365 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-26 01:12:29,365 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:12:28" (3/4) ... [2022-11-26 01:12:29,368 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-26 01:12:29,368 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-26 01:12:29,369 INFO L158 Benchmark]: Toolchain (without parser) took 193069.59ms. Allocated memory was 188.7MB in the beginning and 977.3MB in the end (delta: 788.5MB). Free memory was 138.8MB in the beginning and 449.5MB in the end (delta: -310.8MB). Peak memory consumption was 478.7MB. Max. memory is 16.1GB. [2022-11-26 01:12:29,370 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 188.7MB. Free memory was 150.3MB in the beginning and 150.3MB in the end (delta: 19.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 01:12:29,371 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1227.54ms. Allocated memory was 188.7MB in the beginning and 289.4MB in the end (delta: 100.7MB). Free memory was 138.8MB in the beginning and 221.3MB in the end (delta: -82.5MB). Peak memory consumption was 59.9MB. Max. memory is 16.1GB. [2022-11-26 01:12:29,371 INFO L158 Benchmark]: Boogie Procedure Inliner took 204.08ms. Allocated memory is still 289.4MB. Free memory was 221.3MB in the beginning and 198.2MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2022-11-26 01:12:29,372 INFO L158 Benchmark]: Boogie Preprocessor took 173.42ms. Allocated memory is still 289.4MB. Free memory was 198.2MB in the beginning and 186.7MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-26 01:12:29,373 INFO L158 Benchmark]: RCFGBuilder took 190730.28ms. Allocated memory was 289.4MB in the beginning and 977.3MB in the end (delta: 687.9MB). Free memory was 186.7MB in the beginning and 500.9MB in the end (delta: -314.2MB). Peak memory consumption was 557.1MB. Max. memory is 16.1GB. [2022-11-26 01:12:29,373 INFO L158 Benchmark]: TraceAbstraction took 719.49ms. Allocated memory is still 977.3MB. Free memory was 499.9MB in the beginning and 449.5MB in the end (delta: 50.3MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. [2022-11-26 01:12:29,374 INFO L158 Benchmark]: Witness Printer took 4.00ms. Allocated memory is still 977.3MB. Free memory is still 449.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 01:12:29,377 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 188.7MB. Free memory was 150.3MB in the beginning and 150.3MB in the end (delta: 19.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1227.54ms. Allocated memory was 188.7MB in the beginning and 289.4MB in the end (delta: 100.7MB). Free memory was 138.8MB in the beginning and 221.3MB in the end (delta: -82.5MB). Peak memory consumption was 59.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 204.08ms. Allocated memory is still 289.4MB. Free memory was 221.3MB in the beginning and 198.2MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 173.42ms. Allocated memory is still 289.4MB. Free memory was 198.2MB in the beginning and 186.7MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * RCFGBuilder took 190730.28ms. Allocated memory was 289.4MB in the beginning and 977.3MB in the end (delta: 687.9MB). Free memory was 186.7MB in the beginning and 500.9MB in the end (delta: -314.2MB). Peak memory consumption was 557.1MB. Max. memory is 16.1GB. * TraceAbstraction took 719.49ms. Allocated memory is still 977.3MB. Free memory was 499.9MB in the beginning and 449.5MB in the end (delta: 50.3MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. * Witness Printer took 4.00ms. Allocated memory is still 977.3MB. Free memory is still 449.5MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 340, overapproximation of bitwiseAnd at line 323. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 16); [L29] const SORT_3 msb_SORT_3 = (SORT_3)1 << (16 - 1); [L31] const SORT_6 mask_SORT_6 = (SORT_6)-1 >> (sizeof(SORT_6) * 8 - 12); [L32] const SORT_6 msb_SORT_6 = (SORT_6)1 << (12 - 1); [L34] const SORT_11 mask_SORT_11 = (SORT_11)-1 >> (sizeof(SORT_11) * 8 - 32); [L35] const SORT_11 msb_SORT_11 = (SORT_11)1 << (32 - 1); [L37] const SORT_37 mask_SORT_37 = (SORT_37)-1 >> (sizeof(SORT_37) * 8 - 3); [L38] const SORT_37 msb_SORT_37 = (SORT_37)1 << (3 - 1); [L40] const SORT_44 mask_SORT_44 = (SORT_44)-1 >> (sizeof(SORT_44) * 8 - 2); [L41] const SORT_44 msb_SORT_44 = (SORT_44)1 << (2 - 1); [L43] const SORT_295 mask_SORT_295 = (SORT_295)-1 >> (sizeof(SORT_295) * 8 - 4); [L44] const SORT_295 msb_SORT_295 = (SORT_295)1 << (4 - 1); [L46] const SORT_297 mask_SORT_297 = (SORT_297)-1 >> (sizeof(SORT_297) * 8 - 5); [L47] const SORT_297 msb_SORT_297 = (SORT_297)1 << (5 - 1); [L49] const SORT_299 mask_SORT_299 = (SORT_299)-1 >> (sizeof(SORT_299) * 8 - 6); [L50] const SORT_299 msb_SORT_299 = (SORT_299)1 << (6 - 1); [L52] const SORT_301 mask_SORT_301 = (SORT_301)-1 >> (sizeof(SORT_301) * 8 - 7); [L53] const SORT_301 msb_SORT_301 = (SORT_301)1 << (7 - 1); [L55] const SORT_303 mask_SORT_303 = (SORT_303)-1 >> (sizeof(SORT_303) * 8 - 8); [L56] const SORT_303 msb_SORT_303 = (SORT_303)1 << (8 - 1); [L58] const SORT_305 mask_SORT_305 = (SORT_305)-1 >> (sizeof(SORT_305) * 8 - 9); [L59] const SORT_305 msb_SORT_305 = (SORT_305)1 << (9 - 1); [L61] const SORT_307 mask_SORT_307 = (SORT_307)-1 >> (sizeof(SORT_307) * 8 - 10); [L62] const SORT_307 msb_SORT_307 = (SORT_307)1 << (10 - 1); [L64] const SORT_309 mask_SORT_309 = (SORT_309)-1 >> (sizeof(SORT_309) * 8 - 11); [L65] const SORT_309 msb_SORT_309 = (SORT_309)1 << (11 - 1); [L67] const SORT_312 mask_SORT_312 = (SORT_312)-1 >> (sizeof(SORT_312) * 8 - 13); [L68] const SORT_312 msb_SORT_312 = (SORT_312)1 << (13 - 1); [L70] const SORT_314 mask_SORT_314 = (SORT_314)-1 >> (sizeof(SORT_314) * 8 - 14); [L71] const SORT_314 msb_SORT_314 = (SORT_314)1 << (14 - 1); [L73] const SORT_316 mask_SORT_316 = (SORT_316)-1 >> (sizeof(SORT_316) * 8 - 15); [L74] const SORT_316 msb_SORT_316 = (SORT_316)1 << (15 - 1); [L76] const SORT_533 mask_SORT_533 = (SORT_533)-1 >> (sizeof(SORT_533) * 8 - 17); [L77] const SORT_533 msb_SORT_533 = (SORT_533)1 << (17 - 1); [L79] const SORT_6 var_7 = 0; [L80] const SORT_11 var_13 = 0; [L81] const SORT_3 var_21 = 0; [L82] const SORT_1 var_26 = 0; [L83] const SORT_37 var_38 = 0; [L84] const SORT_1 var_57 = 1; [L85] const SORT_37 var_93 = 2; [L86] const SORT_37 var_97 = 1; [L87] const SORT_37 var_105 = 4; [L88] const SORT_37 var_107 = 5; [L89] const SORT_37 var_111 = 3; [L90] const SORT_6 var_128 = 2; [L91] const SORT_44 var_138 = 0; [L92] const SORT_3 var_145 = 65535; [L93] const SORT_297 var_534 = 0; [L94] const SORT_301 var_626 = 5; [L95] const SORT_301 var_630 = 4; [L96] const SORT_301 var_634 = 3; [L97] const SORT_301 var_638 = 2; [L98] const SORT_301 var_642 = 1; [L99] const SORT_301 var_646 = 0; [L101] SORT_1 input_2; [L102] SORT_3 input_4; [L103] SORT_3 input_5; [L104] SORT_6 input_114; [L105] SORT_6 input_115; [L106] SORT_6 input_116; [L107] SORT_3 input_134; [L108] SORT_3 input_135; [L109] SORT_3 input_136; [L110] SORT_3 input_144; [L111] SORT_3 input_153; [L112] SORT_3 input_154; [L113] SORT_3 input_155; [L114] SORT_3 input_158; [L115] SORT_3 input_176; [L116] SORT_3 input_177; [L117] SORT_3 input_178; [L118] SORT_3 input_181; [L119] SORT_3 input_183; [L120] SORT_44 input_197; [L121] SORT_44 input_198; [L122] SORT_44 input_199; [L123] SORT_3 input_529; [L124] SORT_3 input_530; [L125] SORT_3 input_531; [L126] SORT_3 input_532; [L127] SORT_3 input_555; [L128] SORT_3 input_557; [L129] SORT_3 input_559; [L130] SORT_3 input_563; [L131] SORT_3 input_564; [L132] SORT_3 input_565; [L133] SORT_3 input_566; [L134] SORT_3 input_585; [L135] SORT_3 input_589; [L136] SORT_3 input_591; [L137] SORT_3 input_598; [L138] SORT_3 input_600; [L139] SORT_3 input_605; [L140] SORT_3 input_607; [L141] SORT_3 input_611; [L142] SORT_3 input_612; [L143] SORT_3 input_613; [L144] SORT_3 input_614; [L145] SORT_3 input_615; [L146] SORT_3 input_616; [L147] SORT_3 input_617; [L148] SORT_3 input_618; [L149] SORT_3 input_619; [L150] SORT_3 input_620; [L151] SORT_3 input_621; [L152] SORT_3 input_622; [L153] SORT_3 input_629; [L154] SORT_3 input_633; [L155] SORT_3 input_637; [L156] SORT_3 input_641; [L157] SORT_3 input_645; [L158] SORT_3 input_650; [L159] SORT_3 input_656; [L160] SORT_3 input_658; [L161] SORT_3 input_660; [L162] SORT_3 input_662; [L163] SORT_3 input_665; [L164] SORT_3 input_671; [L165] SORT_3 input_673; [L166] SORT_3 input_675; [L167] SORT_3 input_678; [L168] SORT_3 input_684; [L169] SORT_3 input_686; [L170] SORT_3 input_689; [L171] SORT_3 input_695; [L172] SORT_3 input_698; [L173] SORT_3 input_705; [L174] SORT_3 input_710; [L175] SORT_1 input_729; [L176] SORT_1 input_730; [L177] SORT_1 input_731; [L178] SORT_1 input_732; [L179] SORT_1 input_735; [L180] SORT_1 input_737; [L181] SORT_1 input_739; [L182] SORT_1 input_744; [L183] SORT_1 input_746; [L184] SORT_1 input_751; [L185] SORT_3 input_764; [L186] SORT_3 input_765; [L187] SORT_3 input_766; [L189] SORT_6 state_8 = __VERIFIER_nondet_ushort() & mask_SORT_6; [L190] SORT_6 state_15 = __VERIFIER_nondet_ushort() & mask_SORT_6; [L191] SORT_3 state_22 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L192] SORT_3 state_24 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L193] SORT_3 state_28 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L194] SORT_3 state_30 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L195] SORT_37 state_39 = __VERIFIER_nondet_uchar() & mask_SORT_37; [L196] SORT_3 state_80 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L197] SORT_3 state_82 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L198] SORT_3 state_84 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L199] SORT_1 state_86 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L200] SORT_3 state_88 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L201] SORT_3 state_90 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L203] SORT_6 init_9_arg_1 = var_7; [L204] state_8 = init_9_arg_1 [L205] SORT_6 init_16_arg_1 = var_7; [L206] state_15 = init_16_arg_1 [L207] SORT_3 init_23_arg_1 = var_21; [L208] state_22 = init_23_arg_1 [L209] SORT_3 init_25_arg_1 = var_21; [L210] state_24 = init_25_arg_1 [L211] SORT_3 init_29_arg_1 = var_21; [L212] state_28 = init_29_arg_1 [L213] SORT_3 init_31_arg_1 = var_21; [L214] state_30 = init_31_arg_1 [L215] SORT_37 init_40_arg_1 = var_38; [L216] state_39 = init_40_arg_1 [L217] SORT_3 init_81_arg_1 = var_21; [L218] state_80 = init_81_arg_1 [L219] SORT_3 init_83_arg_1 = var_21; [L220] state_82 = init_83_arg_1 [L221] SORT_3 init_85_arg_1 = var_21; [L222] state_84 = init_85_arg_1 [L223] SORT_1 init_87_arg_1 = var_26; [L224] state_86 = init_87_arg_1 [L225] SORT_3 init_89_arg_1 = var_21; [L226] state_88 = init_89_arg_1 [L227] SORT_3 init_91_arg_1 = var_21; [L228] state_90 = init_91_arg_1 VAL [init_16_arg_1=0, init_23_arg_1=0, init_25_arg_1=0, init_29_arg_1=0, init_31_arg_1=0, init_40_arg_1=0, init_81_arg_1=0, init_83_arg_1=0, init_85_arg_1=0, init_87_arg_1=0, init_89_arg_1=0, init_91_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_11=4294967295, mask_SORT_295=15, mask_SORT_297=31, mask_SORT_299=63, mask_SORT_3=65535, mask_SORT_301=127, mask_SORT_303=255, mask_SORT_305=511, mask_SORT_307=1023, mask_SORT_309=2047, mask_SORT_312=8191, mask_SORT_314=16383, mask_SORT_316=32767, mask_SORT_37=7, mask_SORT_44=3, mask_SORT_533=4294967295, mask_SORT_6=4095, msb_SORT_1=1, msb_SORT_11=2147483648, msb_SORT_295=8, msb_SORT_297=16, msb_SORT_299=32, msb_SORT_3=32768, msb_SORT_301=64, msb_SORT_303=128, msb_SORT_305=256, msb_SORT_307=512, msb_SORT_309=1024, msb_SORT_312=4096, msb_SORT_314=8192, msb_SORT_316=16384, msb_SORT_37=4, msb_SORT_44=2, msb_SORT_533=65536, msb_SORT_6=2048, state_15=0, state_22=0, state_24=0, state_28=0, state_30=0, state_39=0, state_8=0, state_80=0, state_82=0, state_84=0, state_86=0, state_88=0, state_90=0, var_105=4, var_107=5, var_111=3, var_128=2, var_13=0, var_138=0, var_145=65535, var_21=0, var_26=0, var_38=0, var_534=0, var_57=1, var_626=5, var_630=4, var_634=3, var_638=2, var_642=1, var_646=0, var_7=0, var_93=2, var_97=1] [L231] input_2 = __VERIFIER_nondet_uchar() [L232] input_4 = __VERIFIER_nondet_ushort() [L233] input_5 = __VERIFIER_nondet_ushort() [L234] input_114 = __VERIFIER_nondet_ushort() [L235] input_115 = __VERIFIER_nondet_ushort() [L236] input_116 = __VERIFIER_nondet_ushort() [L237] input_134 = __VERIFIER_nondet_ushort() [L238] input_135 = __VERIFIER_nondet_ushort() [L239] input_136 = __VERIFIER_nondet_ushort() [L240] input_144 = __VERIFIER_nondet_ushort() [L241] input_153 = __VERIFIER_nondet_ushort() [L242] input_154 = __VERIFIER_nondet_ushort() [L243] input_155 = __VERIFIER_nondet_ushort() [L244] input_158 = __VERIFIER_nondet_ushort() [L245] input_176 = __VERIFIER_nondet_ushort() [L246] input_177 = __VERIFIER_nondet_ushort() [L247] input_178 = __VERIFIER_nondet_ushort() [L248] input_181 = __VERIFIER_nondet_ushort() [L249] input_183 = __VERIFIER_nondet_ushort() [L250] input_197 = __VERIFIER_nondet_uchar() [L251] input_198 = __VERIFIER_nondet_uchar() [L252] input_199 = __VERIFIER_nondet_uchar() [L253] input_529 = __VERIFIER_nondet_ushort() [L254] input_530 = __VERIFIER_nondet_ushort() [L255] input_531 = __VERIFIER_nondet_ushort() [L256] input_532 = __VERIFIER_nondet_ushort() [L257] input_555 = __VERIFIER_nondet_ushort() [L258] input_557 = __VERIFIER_nondet_ushort() [L259] input_559 = __VERIFIER_nondet_ushort() [L260] input_563 = __VERIFIER_nondet_ushort() [L261] input_564 = __VERIFIER_nondet_ushort() [L262] input_565 = __VERIFIER_nondet_ushort() [L263] input_566 = __VERIFIER_nondet_ushort() [L264] input_585 = __VERIFIER_nondet_ushort() [L265] input_589 = __VERIFIER_nondet_ushort() [L266] input_591 = __VERIFIER_nondet_ushort() [L267] input_598 = __VERIFIER_nondet_ushort() [L268] input_600 = __VERIFIER_nondet_ushort() [L269] input_605 = __VERIFIER_nondet_ushort() [L270] input_607 = __VERIFIER_nondet_ushort() [L271] input_611 = __VERIFIER_nondet_ushort() [L272] input_612 = __VERIFIER_nondet_ushort() [L273] input_613 = __VERIFIER_nondet_ushort() [L274] input_614 = __VERIFIER_nondet_ushort() [L275] input_615 = __VERIFIER_nondet_ushort() [L276] input_616 = __VERIFIER_nondet_ushort() [L277] input_617 = __VERIFIER_nondet_ushort() [L278] input_618 = __VERIFIER_nondet_ushort() [L279] input_619 = __VERIFIER_nondet_ushort() [L280] input_620 = __VERIFIER_nondet_ushort() [L281] input_621 = __VERIFIER_nondet_ushort() [L282] input_622 = __VERIFIER_nondet_ushort() [L283] input_629 = __VERIFIER_nondet_ushort() [L284] input_633 = __VERIFIER_nondet_ushort() [L285] input_637 = __VERIFIER_nondet_ushort() [L286] input_641 = __VERIFIER_nondet_ushort() [L287] input_645 = __VERIFIER_nondet_ushort() [L288] input_650 = __VERIFIER_nondet_ushort() [L289] input_656 = __VERIFIER_nondet_ushort() [L290] input_658 = __VERIFIER_nondet_ushort() [L291] input_660 = __VERIFIER_nondet_ushort() [L292] input_662 = __VERIFIER_nondet_ushort() [L293] input_665 = __VERIFIER_nondet_ushort() [L294] input_671 = __VERIFIER_nondet_ushort() [L295] input_673 = __VERIFIER_nondet_ushort() [L296] input_675 = __VERIFIER_nondet_ushort() [L297] input_678 = __VERIFIER_nondet_ushort() [L298] input_684 = __VERIFIER_nondet_ushort() [L299] input_686 = __VERIFIER_nondet_ushort() [L300] input_689 = __VERIFIER_nondet_ushort() [L301] input_695 = __VERIFIER_nondet_ushort() [L302] input_698 = __VERIFIER_nondet_ushort() [L303] input_705 = __VERIFIER_nondet_ushort() [L304] input_710 = __VERIFIER_nondet_ushort() [L305] input_729 = __VERIFIER_nondet_uchar() [L306] input_730 = __VERIFIER_nondet_uchar() [L307] input_731 = __VERIFIER_nondet_uchar() [L308] input_732 = __VERIFIER_nondet_uchar() [L309] input_735 = __VERIFIER_nondet_uchar() [L310] input_737 = __VERIFIER_nondet_uchar() [L311] input_739 = __VERIFIER_nondet_uchar() [L312] input_744 = __VERIFIER_nondet_uchar() [L313] input_746 = __VERIFIER_nondet_uchar() [L314] input_751 = __VERIFIER_nondet_uchar() [L315] input_764 = __VERIFIER_nondet_ushort() [L316] input_765 = __VERIFIER_nondet_ushort() [L317] input_766 = __VERIFIER_nondet_ushort() [L320] SORT_6 var_10_arg_0 = state_8; [L321] SORT_1 var_10 = var_10_arg_0 >> 0; [L322] SORT_1 var_52_arg_0 = var_10; [L323] var_52_arg_0 = var_52_arg_0 & mask_SORT_1 [L324] SORT_11 var_52 = var_52_arg_0; [L325] SORT_11 var_53_arg_0 = var_52; [L326] SORT_11 var_53_arg_1 = var_13; [L327] SORT_1 var_53 = var_53_arg_0 == var_53_arg_1; [L328] SORT_6 var_17_arg_0 = state_15; [L329] SORT_1 var_17 = var_17_arg_0 >> 0; [L330] SORT_1 var_54_arg_0 = var_17; [L331] var_54_arg_0 = var_54_arg_0 & mask_SORT_1 [L332] SORT_11 var_54 = var_54_arg_0; [L333] SORT_11 var_55_arg_0 = var_54; [L334] SORT_11 var_55_arg_1 = var_13; [L335] SORT_1 var_55 = var_55_arg_0 == var_55_arg_1; [L336] SORT_1 var_56_arg_0 = var_53; [L337] SORT_1 var_56_arg_1 = var_55; [L338] SORT_1 var_56 = var_56_arg_0 & var_56_arg_1; [L339] SORT_1 var_58_arg_0 = var_56; [L340] SORT_1 var_58 = ~var_58_arg_0; [L341] SORT_1 var_59_arg_0 = var_57; [L342] SORT_1 var_59_arg_1 = var_58; [L343] SORT_1 var_59 = var_59_arg_0 & var_59_arg_1; [L344] var_59 = var_59 & mask_SORT_1 [L345] SORT_1 bad_60_arg_0 = var_59; VAL [bad_60_arg_0=1, init_16_arg_1=0, init_23_arg_1=0, init_25_arg_1=0, init_29_arg_1=0, init_31_arg_1=0, init_40_arg_1=0, init_81_arg_1=0, init_83_arg_1=0, init_85_arg_1=0, init_87_arg_1=0, init_89_arg_1=0, init_91_arg_1=0, init_9_arg_1=0, input_114=39, input_115=43, input_116=68, input_134=76, input_135=53, input_136=9, input_144=75, input_153=17, input_154=54, input_155=60, input_158=83, input_176=80, input_177=62, input_178=64, input_181=82, input_183=18, input_197=27, input_198=74, input_199=45, input_2=31, input_4=2, input_5=72, input_529=85, input_530=35, input_531=40, input_532=59, input_555=47, input_557=16, input_559=12, input_563=8, input_564=52, input_565=41, input_566=44, input_585=3, input_589=29, input_591=5, input_598=34, input_600=19, input_605=84, input_607=46, input_611=25, input_612=37, input_613=48, input_614=78, input_615=50, input_616=38, input_617=15, input_618=36, input_619=81, input_620=66, input_621=20, input_622=7, input_629=26, input_633=86, input_637=23, input_641=67, input_645=14, input_650=87, input_656=58, input_658=22, input_660=73, input_662=61, input_665=56, input_671=49, input_673=6, input_675=51, input_678=65, input_684=32, input_686=1, input_689=69, input_695=28, input_698=70, input_705=11, input_710=63, input_729=55, input_730=21, input_731=79, input_732=33, input_735=4, input_737=77, input_739=24, input_744=57, input_746=42, input_751=10, input_764=30, input_765=71, input_766=13, mask_SORT_1=1, mask_SORT_11=4294967295, mask_SORT_295=15, mask_SORT_297=31, mask_SORT_299=63, mask_SORT_3=65535, mask_SORT_301=127, mask_SORT_303=255, mask_SORT_305=511, mask_SORT_307=1023, mask_SORT_309=2047, mask_SORT_312=8191, mask_SORT_314=16383, mask_SORT_316=32767, mask_SORT_37=7, mask_SORT_44=3, mask_SORT_533=4294967295, mask_SORT_6=4095, msb_SORT_1=1, msb_SORT_11=2147483648, msb_SORT_295=8, msb_SORT_297=16, msb_SORT_299=32, msb_SORT_3=32768, msb_SORT_301=64, msb_SORT_303=128, msb_SORT_305=256, msb_SORT_307=512, msb_SORT_309=1024, msb_SORT_312=4096, msb_SORT_314=8192, msb_SORT_316=16384, msb_SORT_37=4, msb_SORT_44=2, msb_SORT_533=65536, msb_SORT_6=2048, state_15=0, state_22=0, state_24=0, state_28=0, state_30=0, state_39=0, state_8=0, state_80=0, state_82=0, state_84=0, state_86=0, state_88=0, state_90=0, var_10=0, var_105=4, var_107=5, var_10_arg_0=0, var_111=3, var_128=2, var_13=0, var_138=0, var_145=65535, var_17=0, var_17_arg_0=0, var_21=0, var_26=0, var_38=0, var_52=0, var_52_arg_0=0, var_53=1, var_534=0, var_53_arg_0=0, var_53_arg_1=0, var_54=0, var_54_arg_0=0, var_55=1, var_55_arg_0=0, var_55_arg_1=0, var_56=1, var_56_arg_0=1, var_56_arg_1=1, var_57=1, var_58=2, var_58_arg_0=1, var_59=1, var_59_arg_0=1, var_59_arg_1=2, var_626=5, var_630=4, var_634=3, var_638=2, var_642=1, var_646=0, var_7=0, var_93=2, var_97=1] [L346] CALL __VERIFIER_assert(!(bad_60_arg_0)) VAL [\old(cond)=0] [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-26 01:12:29,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur --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 64bit --witnessprinter.graph.data.programhash 204d10239a0b36d2351863a85d337d8394fa6f65e7ffe92c9fae442e87993f63 --- 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-38b53e6 [2022-11-26 01:12:31,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:12:31,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:12:31,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:12:31,849 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:12:31,850 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:12:31,855 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:12:31,857 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:12:31,859 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:12:31,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:12:31,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:12:31,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:12:31,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:12:31,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:12:31,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:12:31,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:12:31,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:12:31,871 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:12:31,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:12:31,884 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:12:31,886 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:12:31,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:12:31,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:12:31,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:12:31,897 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:12:31,897 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:12:31,897 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:12:31,898 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:12:31,899 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:12:31,900 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:12:31,900 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:12:31,901 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:12:31,911 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:12:31,912 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:12:31,916 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:12:31,916 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:12:31,917 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:12:31,917 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:12:31,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:12:31,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:12:31,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:12:31,924 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-26 01:12:31,972 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:12:31,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:12:31,973 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:12:31,973 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:12:31,974 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:12:31,974 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:12:31,974 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:12:31,974 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:12:31,975 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:12:31,975 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:12:31,975 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:12:31,975 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:12:31,976 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:12:31,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:12:31,977 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 01:12:31,977 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:12:31,977 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 01:12:31,977 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 01:12:31,977 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-26 01:12:31,978 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-26 01:12:31,978 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 01:12:31,978 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:12:31,978 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 01:12:31,978 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:12:31,979 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-26 01:12:31,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:12:31,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:12:31,979 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:12:31,980 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:12:31,980 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 01:12:31,980 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-26 01:12:31,980 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-26 01:12:31,980 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 01:12:31,981 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:12:31,981 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-26 01:12:31,981 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_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 204d10239a0b36d2351863a85d337d8394fa6f65e7ffe92c9fae442e87993f63 [2022-11-26 01:12:32,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:12:32,351 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:12:32,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:12:32,355 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:12:32,356 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:12:32,357 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c [2022-11-26 01:12:35,498 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:12:35,960 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:12:35,961 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c [2022-11-26 01:12:35,977 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/data/433d30c20/d097d995e0da4d8a82a324a6b52fdc99/FLAG15d223844 [2022-11-26 01:12:36,000 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/data/433d30c20/d097d995e0da4d8a82a324a6b52fdc99 [2022-11-26 01:12:36,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:12:36,007 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:12:36,012 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:12:36,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:12:36,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:12:36,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:12:36" (1/1) ... [2022-11-26 01:12:36,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24a943e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:36, skipping insertion in model container [2022-11-26 01:12:36,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:12:36" (1/1) ... [2022-11-26 01:12:36,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:12:36,095 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:12:36,267 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_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c[1107,1120] [2022-11-26 01:12:36,750 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:12:36,756 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:12:36,778 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_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c[1107,1120] [2022-11-26 01:12:37,009 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:12:37,023 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:12:37,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:37 WrapperNode [2022-11-26 01:12:37,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:12:37,025 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:12:37,026 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:12:37,026 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:12:37,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:37" (1/1) ... [2022-11-26 01:12:37,077 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:37" (1/1) ... [2022-11-26 01:12:37,192 INFO L138 Inliner]: procedures = 11, calls = 6, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2431 [2022-11-26 01:12:37,193 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:12:37,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:12:37,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:12:37,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:12:37,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:37" (1/1) ... [2022-11-26 01:12:37,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:37" (1/1) ... [2022-11-26 01:12:37,216 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:37" (1/1) ... [2022-11-26 01:12:37,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:37" (1/1) ... [2022-11-26 01:12:37,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:37" (1/1) ... [2022-11-26 01:12:37,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:37" (1/1) ... [2022-11-26 01:12:37,274 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:37" (1/1) ... [2022-11-26 01:12:37,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:37" (1/1) ... [2022-11-26 01:12:37,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:12:37,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:12:37,316 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:12:37,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:12:37,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:37" (1/1) ... [2022-11-26 01:12:37,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:12:37,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:12:37,369 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:12:37,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:12:37,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:12:37,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:12:37,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-26 01:12:37,415 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-26 01:12:38,102 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:12:38,104 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:12:42,354 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:12:42,361 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:12:42,361 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 01:12:42,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:12:42 BoogieIcfgContainer [2022-11-26 01:12:42,363 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:12:42,365 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:12:42,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:12:42,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:12:42,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:12:36" (1/3) ... [2022-11-26 01:12:42,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31ceca73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:12:42, skipping insertion in model container [2022-11-26 01:12:42,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:37" (2/3) ... [2022-11-26 01:12:42,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31ceca73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:12:42, skipping insertion in model container [2022-11-26 01:12:42,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:12:42" (3/3) ... [2022-11-26 01:12:42,372 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.h_Vsa16.c [2022-11-26 01:12:42,391 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:12:42,392 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 01:12:42,438 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:12:42,444 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;@d4beb4c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:12:42,445 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 01:12:42,449 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 01:12:42,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 01:12:42,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:42,457 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:42,457 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:42,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:42,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1810462814, now seen corresponding path program 1 times [2022-11-26 01:12:42,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:12:42,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302986046] [2022-11-26 01:12:42,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:42,481 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 [2022-11-26 01:12:42,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:12:42,486 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 01:12:42,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 01:12:43,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:43,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-26 01:12:43,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:43,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:12:43,388 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:12:43,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302986046] [2022-11-26 01:12:43,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302986046] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:43,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:43,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 01:12:43,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065331625] [2022-11-26 01:12:43,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:43,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:12:43,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:12:43,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:12:43,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:12:43,442 INFO L87 Difference]: Start difference. First operand has 21 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:44,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:44,064 INFO L93 Difference]: Finished difference Result 50 states and 77 transitions. [2022-11-26 01:12:44,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:12:44,067 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 01:12:44,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:44,075 INFO L225 Difference]: With dead ends: 50 [2022-11-26 01:12:44,075 INFO L226 Difference]: Without dead ends: 31 [2022-11-26 01:12:44,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-26 01:12:44,081 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:44,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 72 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 01:12:44,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-26 01:12:44,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2022-11-26 01:12:44,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 01:12:44,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-11-26 01:12:44,125 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 7 [2022-11-26 01:12:44,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:44,125 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-11-26 01:12:44,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:44,126 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-11-26 01:12:44,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 01:12:44,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:44,127 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:44,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 01:12:44,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:12:44,344 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:44,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:44,345 INFO L85 PathProgramCache]: Analyzing trace with hash -995691336, now seen corresponding path program 1 times [2022-11-26 01:12:44,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:12:44,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646534488] [2022-11-26 01:12:44,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:44,346 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 [2022-11-26 01:12:44,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:12:44,347 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 01:12:44,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 01:12:44,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:44,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-26 01:12:44,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:45,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:45,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:12:45,034 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:12:45,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646534488] [2022-11-26 01:12:45,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1646534488] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:45,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:45,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 01:12:45,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120945937] [2022-11-26 01:12:45,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:45,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:12:45,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:12:45,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:12:45,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:12:45,039 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 01:12:45,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:45,615 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-11-26 01:12:45,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:12:45,619 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-11-26 01:12:45,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:45,620 INFO L225 Difference]: With dead ends: 39 [2022-11-26 01:12:45,620 INFO L226 Difference]: Without dead ends: 37 [2022-11-26 01:12:45,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-26 01:12:45,622 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:45,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 92 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 01:12:45,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-26 01:12:45,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2022-11-26 01:12:45,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 01:12:45,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-11-26 01:12:45,633 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 13 [2022-11-26 01:12:45,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:45,634 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-11-26 01:12:45,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 01:12:45,637 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-11-26 01:12:45,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 01:12:45,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:45,638 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:45,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 01:12:45,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:12:45,851 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:45,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:45,852 INFO L85 PathProgramCache]: Analyzing trace with hash -53539184, now seen corresponding path program 1 times [2022-11-26 01:12:45,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:12:45,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099888211] [2022-11-26 01:12:45,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:45,856 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 [2022-11-26 01:12:45,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:12:45,858 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 01:12:45,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-26 01:12:46,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:46,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 01:12:46,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 01:12:46,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:12:46,588 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:12:46,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2099888211] [2022-11-26 01:12:46,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2099888211] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:46,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:46,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 01:12:46,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920764122] [2022-11-26 01:12:46,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:46,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:12:46,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:12:46,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:12:46,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:12:46,596 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 01:12:47,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:47,137 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2022-11-26 01:12:47,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:12:47,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-11-26 01:12:47,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:47,141 INFO L225 Difference]: With dead ends: 45 [2022-11-26 01:12:47,141 INFO L226 Difference]: Without dead ends: 43 [2022-11-26 01:12:47,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-26 01:12:47,142 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:47,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 103 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 01:12:47,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-26 01:12:47,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2022-11-26 01:12:47,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 01:12:47,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-11-26 01:12:47,155 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 19 [2022-11-26 01:12:47,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:47,156 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-11-26 01:12:47,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 01:12:47,156 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-11-26 01:12:47,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-26 01:12:47,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:47,157 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:47,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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)] Ended with exit code 0 [2022-11-26 01:12:47,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:12:47,369 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:47,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:47,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1735839898, now seen corresponding path program 1 times [2022-11-26 01:12:47,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:12:47,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120409865] [2022-11-26 01:12:47,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:47,371 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 [2022-11-26 01:12:47,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:12:47,372 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 01:12:47,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-26 01:12:47,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:47,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-26 01:12:47,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:48,372 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 01:12:48,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:12:48,373 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:12:48,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120409865] [2022-11-26 01:12:48,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120409865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:48,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:48,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 01:12:48,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546436181] [2022-11-26 01:12:48,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:48,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:12:48,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:12:48,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:12:48,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-26 01:12:48,375 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 01:12:49,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:49,066 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2022-11-26 01:12:49,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 01:12:49,067 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-11-26 01:12:49,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:49,068 INFO L225 Difference]: With dead ends: 51 [2022-11-26 01:12:49,068 INFO L226 Difference]: Without dead ends: 49 [2022-11-26 01:12:49,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-26 01:12:49,069 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:49,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 154 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 01:12:49,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-26 01:12:49,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2022-11-26 01:12:49,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-26 01:12:49,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-11-26 01:12:49,080 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 25 [2022-11-26 01:12:49,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:49,081 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-11-26 01:12:49,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 01:12:49,081 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-11-26 01:12:49,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-26 01:12:49,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:49,082 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:49,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:49,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:12:49,296 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:49,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:49,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2127961366, now seen corresponding path program 1 times [2022-11-26 01:12:49,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:12:49,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1168087268] [2022-11-26 01:12:49,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:49,300 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 [2022-11-26 01:12:49,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:12:49,302 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 01:12:49,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 01:12:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:50,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 2196 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-26 01:12:50,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:50,879 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 01:12:50,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:12:52,346 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:12:52,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1168087268] [2022-11-26 01:12:52,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1168087268] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:12:52,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [806339438] [2022-11-26 01:12:52,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:52,347 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:12:52,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:12:52,359 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:12:52,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-26 01:12:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:54,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 2196 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-26 01:12:54,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:55,064 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 01:12:55,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:12:55,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [806339438] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:12:55,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658966291] [2022-11-26 01:12:55,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:55,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:55,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:12:55,707 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:12:55,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 01:12:56,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:56,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 2196 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-26 01:12:56,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:57,170 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 01:12:57,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:12:57,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658966291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:12:57,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:12:57,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 12 [2022-11-26 01:12:57,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766345032] [2022-11-26 01:12:57,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:12:57,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 01:12:57,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:12:57,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 01:12:57,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:12:57,751 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 12 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-26 01:12:59,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:59,038 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2022-11-26 01:12:59,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 01:12:59,039 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 32 [2022-11-26 01:12:59,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:59,040 INFO L225 Difference]: With dead ends: 57 [2022-11-26 01:12:59,040 INFO L226 Difference]: Without dead ends: 55 [2022-11-26 01:12:59,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-11-26 01:12:59,042 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 32 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:59,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 39 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 01:12:59,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-26 01:12:59,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2022-11-26 01:12:59,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-26 01:12:59,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2022-11-26 01:12:59,054 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 32 [2022-11-26 01:12:59,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:59,055 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2022-11-26 01:12:59,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-26 01:12:59,055 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2022-11-26 01:12:59,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-26 01:12:59,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:59,056 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:59,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 01:12:59,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:59,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:59,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:59,672 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:59,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:59,672 INFO L85 PathProgramCache]: Analyzing trace with hash 2047029104, now seen corresponding path program 2 times [2022-11-26 01:12:59,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:12:59,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [253585466] [2022-11-26 01:12:59,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 01:12:59,674 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 [2022-11-26 01:12:59,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:12:59,675 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 01:12:59,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 01:13:00,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 01:13:00,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:13:00,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 2226 conjuncts, 259 conjunts are in the unsatisfiable core [2022-11-26 01:13:00,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:03,962 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-26 01:13:03,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:13:04,454 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:13:04,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [253585466] [2022-11-26 01:13:04,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [253585466] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:13:04,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [729674299] [2022-11-26 01:13:04,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 01:13:04,456 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:13:04,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:13:04,458 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:13:04,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-26 01:13:06,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 01:13:06,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:13:06,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 2226 conjuncts, 262 conjunts are in the unsatisfiable core [2022-11-26 01:13:06,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:09,401 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-26 01:13:09,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:13:09,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [729674299] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:13:09,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577152713] [2022-11-26 01:13:09,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 01:13:09,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:13:09,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:13:09,607 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:13:09,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 01:13:10,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 01:13:10,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:13:10,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 2226 conjuncts, 262 conjunts are in the unsatisfiable core [2022-11-26 01:13:10,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 01:13:13,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:13:13,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577152713] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:13:13,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:13:13,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 10 [2022-11-26 01:13:13,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964000169] [2022-11-26 01:13:13,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:13:13,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-26 01:13:13,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:13:13,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-26 01:13:13,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-26 01:13:13,697 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 01:13:14,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:13:14,684 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2022-11-26 01:13:14,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 01:13:14,684 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-11-26 01:13:14,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:13:14,686 INFO L225 Difference]: With dead ends: 61 [2022-11-26 01:13:14,686 INFO L226 Difference]: Without dead ends: 59 [2022-11-26 01:13:14,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-26 01:13:14,687 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 01:13:14,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 52 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 01:13:14,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-26 01:13:14,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2022-11-26 01:13:14,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 01:13:14,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-11-26 01:13:14,702 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 38 [2022-11-26 01:13:14,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:13:14,703 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-11-26 01:13:14,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 01:13:14,703 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-11-26 01:13:14,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-26 01:13:14,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:13:14,705 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:13:14,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:14,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-26 01:13:15,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:15,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:13:15,311 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:13:15,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:13:15,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1813143368, now seen corresponding path program 3 times [2022-11-26 01:13:15,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:13:15,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [224736981] [2022-11-26 01:13:15,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:13:15,314 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 [2022-11-26 01:13:15,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:13:15,315 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 01:13:15,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-26 01:13:16,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 01:13:16,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:13:16,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 2104 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-26 01:13:16,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-26 01:13:16,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:13:16,806 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:13:16,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [224736981] [2022-11-26 01:13:16,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [224736981] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:13:16,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1895094449] [2022-11-26 01:13:16,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:13:16,806 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:13:16,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:13:16,811 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:13:16,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-26 01:13:18,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 01:13:18,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:13:18,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 2104 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-26 01:13:18,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:19,158 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-26 01:13:19,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:13:19,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1895094449] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:13:19,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571628484] [2022-11-26 01:13:19,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:13:19,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:13:19,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:13:19,263 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:13:19,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 01:13:20,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 01:13:20,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:13:20,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 2104 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-26 01:13:20,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-26 01:13:20,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:13:20,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571628484] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:13:20,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:13:20,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-11-26 01:13:20,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996280015] [2022-11-26 01:13:20,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:13:20,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:13:20,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:13:20,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:13:20,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-26 01:13:20,489 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 01:13:21,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:13:21,494 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2022-11-26 01:13:21,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 01:13:21,495 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2022-11-26 01:13:21,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:13:21,498 INFO L225 Difference]: With dead ends: 70 [2022-11-26 01:13:21,499 INFO L226 Difference]: Without dead ends: 68 [2022-11-26 01:13:21,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 136 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-26 01:13:21,500 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:13:21,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 121 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 01:13:21,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-26 01:13:21,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2022-11-26 01:13:21,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-26 01:13:21,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2022-11-26 01:13:21,552 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 44 [2022-11-26 01:13:21,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:13:21,552 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2022-11-26 01:13:21,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 01:13:21,553 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2022-11-26 01:13:21,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-26 01:13:21,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:13:21,554 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-26 01:13:21,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:21,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:21,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:22,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 01:13:22,160 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:13:22,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:13:22,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1099634206, now seen corresponding path program 4 times [2022-11-26 01:13:22,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:13:22,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555368649] [2022-11-26 01:13:22,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 01:13:22,163 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 [2022-11-26 01:13:22,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:13:22,164 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 01:13:22,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-26 01:13:23,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 01:13:23,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:13:23,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 2318 conjuncts, 327 conjunts are in the unsatisfiable core [2022-11-26 01:13:23,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:26,765 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-26 01:13:26,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:13:28,600 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:13:28,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555368649] [2022-11-26 01:13:28,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555368649] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:13:28,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [511533791] [2022-11-26 01:13:28,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 01:13:28,601 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:13:28,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:13:28,601 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:13:28,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-26 01:13:30,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 01:13:30,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:13:30,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 2318 conjuncts, 333 conjunts are in the unsatisfiable core [2022-11-26 01:13:30,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:34,207 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-26 01:13:34,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:13:35,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [511533791] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:13:35,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453233259] [2022-11-26 01:13:35,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 01:13:35,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:13:35,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:13:35,283 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:13:35,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-26 01:13:36,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 01:13:36,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:13:36,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 2318 conjuncts, 141 conjunts are in the unsatisfiable core [2022-11-26 01:13:36,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 37 proven. 21 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-26 01:13:38,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:13:42,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453233259] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:13:42,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:13:42,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 15] total 20 [2022-11-26 01:13:42,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522678681] [2022-11-26 01:13:42,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:13:42,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 01:13:42,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:13:42,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 01:13:42,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-11-26 01:13:42,188 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 20 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 9 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-26 01:13:48,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:13:48,404 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2022-11-26 01:13:48,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-26 01:13:48,417 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 9 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 50 [2022-11-26 01:13:48,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:13:48,418 INFO L225 Difference]: With dead ends: 70 [2022-11-26 01:13:48,418 INFO L226 Difference]: Without dead ends: 68 [2022-11-26 01:13:48,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 141 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2022-11-26 01:13:48,419 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 59 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:13:48,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 87 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-26 01:13:48,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-26 01:13:48,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-11-26 01:13:48,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 45 states have internal predecessors, (45), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-26 01:13:48,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-11-26 01:13:48,461 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 50 [2022-11-26 01:13:48,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:13:48,461 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-11-26 01:13:48,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 9 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-26 01:13:48,462 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-11-26 01:13:48,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-26 01:13:48,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:13:48,463 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-26 01:13:48,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:48,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:48,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:49,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:13:49,076 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:13:49,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:13:49,076 INFO L85 PathProgramCache]: Analyzing trace with hash -623003810, now seen corresponding path program 5 times [2022-11-26 01:13:49,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:13:49,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070325798] [2022-11-26 01:13:49,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-26 01:13:49,080 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 [2022-11-26 01:13:49,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:13:49,081 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 01:13:49,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 01:13:50,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-26 01:13:50,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:13:50,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 4190 conjuncts, 121 conjunts are in the unsatisfiable core [2022-11-26 01:13:50,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:52,491 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 40 proven. 34 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-26 01:13:52,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:13:54,140 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:13:54,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070325798] [2022-11-26 01:13:54,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070325798] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:13:54,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1821075271] [2022-11-26 01:13:54,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-26 01:13:54,141 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:13:54,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:13:54,143 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:13:54,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-26 01:13:58,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-26 01:13:58,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:13:58,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 4190 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-26 01:13:58,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:59,509 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-26 01:13:59,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:14:00,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1821075271] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:14:00,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388013350] [2022-11-26 01:14:00,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-26 01:14:00,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:14:00,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:14:00,660 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:14:00,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-26 01:14:03,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-26 01:14:03,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:14:03,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 4190 conjuncts, 105 conjunts are in the unsatisfiable core [2022-11-26 01:14:03,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:14:05,383 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 35 proven. 30 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-26 01:14:05,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:14:06,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388013350] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:14:06,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:14:06,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 13] total 25 [2022-11-26 01:14:06,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031354559] [2022-11-26 01:14:06,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:14:06,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 01:14:06,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:14:06,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 01:14:06,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2022-11-26 01:14:06,404 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 25 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 22 states have internal predecessors, (46), 12 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 10 states have call successors, (24) [2022-11-26 01:14:10,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:14:10,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:14:10,775 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2022-11-26 01:14:10,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 01:14:10,775 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 22 states have internal predecessors, (46), 12 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 10 states have call successors, (24) Word has length 57 [2022-11-26 01:14:10,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:14:10,776 INFO L225 Difference]: With dead ends: 82 [2022-11-26 01:14:10,777 INFO L226 Difference]: Without dead ends: 80 [2022-11-26 01:14:10,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 157 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2022-11-26 01:14:10,778 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 59 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:14:10,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 81 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-26 01:14:10,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-26 01:14:10,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2022-11-26 01:14:10,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 50 states have internal predecessors, (50), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-26 01:14:10,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2022-11-26 01:14:10,806 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 57 [2022-11-26 01:14:10,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:14:10,807 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2022-11-26 01:14:10,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 22 states have internal predecessors, (46), 12 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 10 states have call successors, (24) [2022-11-26 01:14:10,807 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2022-11-26 01:14:10,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-26 01:14:10,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:14:10,808 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-26 01:14:10,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-26 01:14:11,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 01:14:11,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-26 01:14:11,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:14:11,439 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:14:11,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:14:11,440 INFO L85 PathProgramCache]: Analyzing trace with hash -718277704, now seen corresponding path program 6 times [2022-11-26 01:14:11,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:14:11,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1077066733] [2022-11-26 01:14:11,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-26 01:14:11,456 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 [2022-11-26 01:14:11,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:14:11,457 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 01:14:11,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 01:14:12,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-26 01:14:12,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:14:12,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 2194 conjuncts, 374 conjunts are in the unsatisfiable core [2022-11-26 01:14:12,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:14:22,293 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 32 proven. 24 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-11-26 01:14:22,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:14:22,821 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:14:22,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1077066733] [2022-11-26 01:14:22,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1077066733] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:14:22,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1819193167] [2022-11-26 01:14:22,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-26 01:14:22,821 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:14:22,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:14:22,822 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:14:22,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-26 01:14:25,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-26 01:14:25,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:14:25,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 2194 conjuncts, 445 conjunts are in the unsatisfiable core [2022-11-26 01:14:25,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:14:38,520 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 36 proven. 41 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-26 01:14:38,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:14:38,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1819193167] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:14:38,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516290840] [2022-11-26 01:14:38,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-26 01:14:38,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:14:38,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:14:38,742 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:14:38,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-26 01:14:40,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-26 01:14:40,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:14:40,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 2194 conjuncts, 382 conjunts are in the unsatisfiable core [2022-11-26 01:14:40,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:14:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-11-26 01:14:49,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:14:49,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516290840] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:14:49,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:14:49,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 21 [2022-11-26 01:14:49,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091725518] [2022-11-26 01:14:49,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:14:49,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-26 01:14:49,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:14:49,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-26 01:14:49,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-11-26 01:14:49,743 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 21 states, 15 states have (on average 3.0) internal successors, (45), 20 states have internal predecessors, (45), 14 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 12 states have call successors, (23) [2022-11-26 01:14:52,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:14:54,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:14:57,490 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] [2022-11-26 01:14:57,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:14:57,608 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2022-11-26 01:14:57,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 01:14:57,609 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 3.0) internal successors, (45), 20 states have internal predecessors, (45), 14 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 12 states have call successors, (23) Word has length 63 [2022-11-26 01:14:57,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:14:57,611 INFO L225 Difference]: With dead ends: 79 [2022-11-26 01:14:57,612 INFO L226 Difference]: Without dead ends: 77 [2022-11-26 01:14:57,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 181 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2022-11-26 01:14:57,613 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 52 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:14:57,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 88 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 142 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2022-11-26 01:14:57,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-26 01:14:57,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-26 01:14:57,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 53 states have internal predecessors, (53), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-26 01:14:57,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2022-11-26 01:14:57,651 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 63 [2022-11-26 01:14:57,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:14:57,651 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2022-11-26 01:14:57,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 3.0) internal successors, (45), 20 states have internal predecessors, (45), 14 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 12 states have call successors, (23) [2022-11-26 01:14:57,652 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2022-11-26 01:14:57,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-26 01:14:57,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:14:57,653 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-26 01:14:57,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 01:14:57,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-26 01:14:58,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-26 01:14:58,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 01:14:58,268 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:14:58,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:14:58,268 INFO L85 PathProgramCache]: Analyzing trace with hash -597897840, now seen corresponding path program 7 times [2022-11-26 01:14:58,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:14:58,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1370759192] [2022-11-26 01:14:58,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 01:14:58,271 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 [2022-11-26 01:14:58,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:14:58,272 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 01:14:58,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 01:14:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:15:00,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 4250 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-26 01:15:00,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:15:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-26 01:15:00,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:15:00,707 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:15:00,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1370759192] [2022-11-26 01:15:00,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1370759192] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:15:00,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1289644718] [2022-11-26 01:15:00,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 01:15:00,708 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:15:00,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:15:00,709 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:15:00,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-26 01:15:04,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:15:04,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 4250 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-26 01:15:04,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:15:04,776 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-26 01:15:04,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:15:04,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1289644718] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:15:04,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446047554] [2022-11-26 01:15:04,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 01:15:04,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:15:04,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:15:04,894 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:15:04,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-26 01:15:06,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:15:06,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 4250 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-26 01:15:06,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:15:06,775 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 19 proven. 49 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-26 01:15:06,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:15:06,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446047554] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:15:06,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:15:06,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10] total 13 [2022-11-26 01:15:06,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842313447] [2022-11-26 01:15:06,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:15:06,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 01:15:06,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:15:06,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 01:15:06,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:15:06,903 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 12 states have internal predecessors, (36), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-26 01:15:09,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:15:09,053 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2022-11-26 01:15:09,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 01:15:09,054 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 12 states have internal predecessors, (36), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 69 [2022-11-26 01:15:09,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:15:09,055 INFO L225 Difference]: With dead ends: 90 [2022-11-26 01:15:09,055 INFO L226 Difference]: Without dead ends: 88 [2022-11-26 01:15:09,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 205 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-11-26 01:15:09,056 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:15:09,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 99 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-26 01:15:09,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-26 01:15:09,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2022-11-26 01:15:09,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 58 states have internal predecessors, (58), 15 states have call successors, (15), 12 states have call predecessors, (15), 12 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-26 01:15:09,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2022-11-26 01:15:09,090 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 69 [2022-11-26 01:15:09,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:15:09,091 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2022-11-26 01:15:09,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 12 states have internal predecessors, (36), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-26 01:15:09,091 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2022-11-26 01:15:09,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-26 01:15:09,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:15:09,092 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-11-26 01:15:09,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-26 01:15:09,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 01:15:09,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-26 01:15:09,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 01:15:09,699 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:15:09,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:15:09,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1601458586, now seen corresponding path program 8 times [2022-11-26 01:15:09,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:15:09,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642613010] [2022-11-26 01:15:09,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 01:15:09,703 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 [2022-11-26 01:15:09,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:15:09,705 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 01:15:09,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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)] Waiting until timeout for monitored process [2022-11-26 01:15:11,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 01:15:11,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:15:11,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 4312 conjuncts, 571 conjunts are in the unsatisfiable core [2022-11-26 01:15:11,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:15:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-26 01:15:21,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:15:23,323 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:15:23,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642613010] [2022-11-26 01:15:23,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642613010] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:15:23,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1805243401] [2022-11-26 01:15:23,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 01:15:23,324 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:15:23,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:15:23,326 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:15:23,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-26 01:15:26,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 01:15:26,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:15:27,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 4312 conjuncts, 578 conjunts are in the unsatisfiable core [2022-11-26 01:15:27,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:15:36,890 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-26 01:15:36,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:15:38,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1805243401] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:15:38,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424455161] [2022-11-26 01:15:38,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 01:15:38,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:15:38,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:15:38,070 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:15:38,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-26 01:15:39,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 01:15:39,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:15:39,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 4312 conjuncts, 124 conjunts are in the unsatisfiable core [2022-11-26 01:15:39,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:15:41,292 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 89 proven. 31 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-26 01:15:41,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:15:46,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424455161] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:15:46,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:15:46,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 14] total 20 [2022-11-26 01:15:46,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17905539] [2022-11-26 01:15:46,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:15:46,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 01:15:46,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:15:46,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 01:15:46,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-11-26 01:15:46,018 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 20 states, 15 states have (on average 2.4) internal successors, (36), 16 states have internal predecessors, (36), 10 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-11-26 01:15:54,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:15:54,189 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2022-11-26 01:15:54,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-26 01:15:54,190 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 2.4) internal successors, (36), 16 states have internal predecessors, (36), 10 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 75 [2022-11-26 01:15:54,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:15:54,191 INFO L225 Difference]: With dead ends: 98 [2022-11-26 01:15:54,191 INFO L226 Difference]: Without dead ends: 96 [2022-11-26 01:15:54,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 216 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=304, Invalid=1418, Unknown=0, NotChecked=0, Total=1722 [2022-11-26 01:15:54,192 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 78 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:15:54,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 96 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-26 01:15:54,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-26 01:15:54,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2022-11-26 01:15:54,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 64 states have internal predecessors, (64), 15 states have call successors, (15), 14 states have call predecessors, (15), 14 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-26 01:15:54,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-11-26 01:15:54,227 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 75 [2022-11-26 01:15:54,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:15:54,227 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-11-26 01:15:54,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 2.4) internal successors, (36), 16 states have internal predecessors, (36), 10 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-11-26 01:15:54,228 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-11-26 01:15:54,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-26 01:15:54,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:15:54,229 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-11-26 01:15:54,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-26 01:15:54,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-26 01:15:54,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-26 01:15:54,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 01:15:54,835 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:15:54,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:15:54,836 INFO L85 PathProgramCache]: Analyzing trace with hash -2049524202, now seen corresponding path program 9 times [2022-11-26 01:15:54,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:15:54,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1126460405] [2022-11-26 01:15:54,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:15:54,840 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 [2022-11-26 01:15:54,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:15:54,841 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 01:15:54,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-26 01:15:57,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-26 01:15:57,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:15:57,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 6092 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-26 01:15:57,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:15:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 56 proven. 34 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-26 01:15:59,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:16:00,451 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:16:00,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1126460405] [2022-11-26 01:16:00,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1126460405] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:16:00,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [736824721] [2022-11-26 01:16:00,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:16:00,452 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:16:00,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:16:00,453 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:16:00,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-26 01:16:06,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-26 01:16:06,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:16:06,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 6092 conjuncts, 127 conjunts are in the unsatisfiable core [2022-11-26 01:16:06,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:16:08,570 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-26 01:16:08,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:16:09,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [736824721] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:16:09,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624110835] [2022-11-26 01:16:09,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:16:09,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:16:09,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:16:09,757 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:16:09,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-26 01:16:12,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-26 01:16:12,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:16:12,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 6092 conjuncts, 299 conjunts are in the unsatisfiable core [2022-11-26 01:16:12,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:16:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 56 proven. 34 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-26 01:16:42,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:16:45,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624110835] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:16:45,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:16:45,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 14] total 25 [2022-11-26 01:16:45,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296197129] [2022-11-26 01:16:45,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:16:45,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 01:16:45,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:16:45,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 01:16:45,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=892, Unknown=1, NotChecked=0, Total=992 [2022-11-26 01:16:45,260 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 25 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 22 states have internal predecessors, (61), 13 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2022-11-26 01:16:51,926 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] [2022-11-26 01:16:55,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:16:57,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:16:59,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:17:05,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:17:13,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:17:15,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:17:17,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:17:19,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:17:21,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:17:23,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:17:25,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:17:27,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:17:29,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:17:39,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:17:41,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:17:43,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:17:57,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:18:05,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:18:15,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:18:17,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:18:19,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:18:21,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:18:23,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:18:25,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:18:27,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:18:29,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:18:31,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:18:43,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:18:45,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:18:47,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:19:07,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:19:29,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:19:49,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:19:51,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:20:01,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:20:09,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:20:11,832 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] [2022-11-26 01:20:13,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:20:13,748 INFO L93 Difference]: Finished difference Result 138 states and 155 transitions. [2022-11-26 01:20:13,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-26 01:20:13,749 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 22 states have internal predecessors, (61), 13 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) Word has length 82 [2022-11-26 01:20:13,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:20:13,750 INFO L225 Difference]: With dead ends: 138 [2022-11-26 01:20:13,750 INFO L226 Difference]: Without dead ends: 136 [2022-11-26 01:20:13,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 234 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 137.2s TimeCoverageRelationStatistics Valid=459, Invalid=2357, Unknown=46, NotChecked=0, Total=2862 [2022-11-26 01:20:13,752 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 132 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 152 mSolverCounterUnsat, 38 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 38 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 85.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:20:13,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 122 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 689 Invalid, 38 Unknown, 0 Unchecked, 85.2s Time] [2022-11-26 01:20:13,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-26 01:20:13,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 129. [2022-11-26 01:20:13,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 85 states have internal predecessors, (85), 29 states have call successors, (29), 15 states have call predecessors, (29), 15 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2022-11-26 01:20:13,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 143 transitions. [2022-11-26 01:20:13,857 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 143 transitions. Word has length 82 [2022-11-26 01:20:13,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:20:13,857 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 143 transitions. [2022-11-26 01:20:13,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 22 states have internal predecessors, (61), 13 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2022-11-26 01:20:13,857 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 143 transitions. [2022-11-26 01:20:13,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-26 01:20:13,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:20:13,858 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-11-26 01:20:13,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-26 01:20:14,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-26 01:20:14,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-26 01:20:14,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:20:14,465 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:20:14,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:20:14,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1512669256, now seen corresponding path program 10 times [2022-11-26 01:20:14,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:20:14,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [505139760] [2022-11-26 01:20:14,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 01:20:14,491 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 [2022-11-26 01:20:14,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:20:14,495 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 01:20:14,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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)] Waiting until timeout for monitored process [2022-11-26 01:20:16,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 01:20:16,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:20:16,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 6244 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-26 01:20:16,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:20:17,422 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 28 proven. 45 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-11-26 01:20:17,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:20:17,672 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:20:17,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [505139760] [2022-11-26 01:20:17,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [505139760] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:20:17,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [845463522] [2022-11-26 01:20:17,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 01:20:17,672 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:20:17,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:20:17,673 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:20:17,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-26 01:20:22,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 01:20:22,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:20:22,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 6244 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-26 01:20:22,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:20:23,549 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 28 proven. 45 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-11-26 01:20:23,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:20:23,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [845463522] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:20:23,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983950652] [2022-11-26 01:20:23,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 01:20:23,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:20:23,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:20:23,687 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:20:23,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-26 01:20:25,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 01:20:25,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:20:25,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 6244 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-26 01:20:25,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:20:27,676 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 63 proven. 82 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-11-26 01:20:27,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:20:28,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983950652] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:20:28,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:20:28,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 14] total 23 [2022-11-26 01:20:28,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937779612] [2022-11-26 01:20:28,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:20:28,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-26 01:20:28,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:20:28,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-26 01:20:28,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-11-26 01:20:28,063 INFO L87 Difference]: Start difference. First operand 129 states and 143 transitions. Second operand has 23 states, 20 states have (on average 3.35) internal successors, (67), 21 states have internal predecessors, (67), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 14 states have call predecessors, (42), 14 states have call successors, (42) [2022-11-26 01:20:33,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:20:33,373 INFO L93 Difference]: Finished difference Result 135 states and 148 transitions. [2022-11-26 01:20:33,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-26 01:20:33,373 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.35) internal successors, (67), 21 states have internal predecessors, (67), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 14 states have call predecessors, (42), 14 states have call successors, (42) Word has length 94 [2022-11-26 01:20:33,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:20:33,375 INFO L225 Difference]: With dead ends: 135 [2022-11-26 01:20:33,375 INFO L226 Difference]: Without dead ends: 133 [2022-11-26 01:20:33,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 271 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=252, Invalid=1154, Unknown=0, NotChecked=0, Total=1406 [2022-11-26 01:20:33,376 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 70 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:20:33,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 173 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-26 01:20:33,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-26 01:20:33,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-11-26 01:20:33,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 88 states have internal predecessors, (88), 29 states have call successors, (29), 16 states have call predecessors, (29), 16 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2022-11-26 01:20:33,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 146 transitions. [2022-11-26 01:20:33,466 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 146 transitions. Word has length 94 [2022-11-26 01:20:33,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:20:33,467 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 146 transitions. [2022-11-26 01:20:33,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.35) internal successors, (67), 21 states have internal predecessors, (67), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 14 states have call predecessors, (42), 14 states have call successors, (42) [2022-11-26 01:20:33,467 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 146 transitions. [2022-11-26 01:20:33,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-26 01:20:33,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:20:33,469 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1] [2022-11-26 01:20:33,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-26 01:20:33,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-26 01:20:33,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-26 01:20:34,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:20:34,085 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:20:34,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:20:34,087 INFO L85 PathProgramCache]: Analyzing trace with hash -334938090, now seen corresponding path program 11 times [2022-11-26 01:20:34,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:20:34,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667833332] [2022-11-26 01:20:34,119 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-26 01:20:34,119 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 [2022-11-26 01:20:34,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:20:34,121 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-26 01:20:34,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-26 01:20:41,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-11-26 01:20:41,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:20:41,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 14160 conjuncts, 173 conjunts are in the unsatisfiable core [2022-11-26 01:20:41,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:20:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 152 proven. 323 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2022-11-26 01:20:45,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:20:47,244 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:20:47,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667833332] [2022-11-26 01:20:47,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667833332] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:20:47,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1545926801] [2022-11-26 01:20:47,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-26 01:20:47,245 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:20:47,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:20:47,246 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:20:47,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-26 01:21:09,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-11-26 01:21:09,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:21:09,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 14160 conjuncts, 448 conjunts are in the unsatisfiable core [2022-11-26 01:21:09,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:21:35,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 56 proven. 203 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2022-11-26 01:21:35,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:21:36,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1545926801] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:21:36,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362704752] [2022-11-26 01:21:36,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-26 01:21:36,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:21:36,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:21:36,693 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:21:36,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ffceb0-4410-40c5-9d70-d29ddc8de6d0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-26 01:23:28,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-11-26 01:23:28,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:23:28,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 14160 conjuncts, 220 conjunts are in the unsatisfiable core [2022-11-26 01:23:28,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:23:34,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 117 proven. 298 refuted. 0 times theorem prover too weak. 1356 trivial. 0 not checked. [2022-11-26 01:23:34,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:23:35,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362704752] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:23:35,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:23:35,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 18] total 39 [2022-11-26 01:23:35,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411556307] [2022-11-26 01:23:35,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:23:35,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-26 01:23:35,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:23:35,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-26 01:23:35,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1729, Unknown=3, NotChecked=0, Total=1892 [2022-11-26 01:23:35,325 INFO L87 Difference]: Start difference. First operand 133 states and 146 transitions. Second operand has 39 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 36 states have internal predecessors, (117), 26 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (80), 22 states have call predecessors, (80), 24 states have call successors, (80) [2022-11-26 01:23:43,216 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] [2022-11-26 01:23:48,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:23:50,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:23:52,642 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]