./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1f6ee705374b9304c4ad35807ad9bde4a154c7f85315159d7da4519e0aae9554 --- 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-6b4ec56 [2022-11-20 20:20:25,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:20:25,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:20:25,833 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:20:25,834 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:20:25,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:20:25,836 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:20:25,844 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:20:25,848 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:20:25,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:20:25,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:20:25,852 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:20:25,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:20:25,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:20:25,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:20:25,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:20:25,856 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:20:25,857 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:20:25,863 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:20:25,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:20:25,874 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:20:25,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:20:25,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:20:25,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:20:25,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:20:25,883 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:20:25,883 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:20:25,884 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:20:25,884 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:20:25,885 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:20:25,886 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:20:25,886 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:20:25,896 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:20:25,897 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:20:25,898 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:20:25,898 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:20:25,900 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:20:25,900 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:20:25,900 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:20:25,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:20:25,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:20:25,906 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 20:20:25,947 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:20:25,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:20:25,948 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:20:25,948 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:20:25,949 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:20:25,949 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:20:25,949 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:20:25,949 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:20:25,950 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:20:25,950 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:20:25,951 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:20:25,951 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:20:25,951 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:20:25,951 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:20:25,952 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:20:25,952 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:20:25,952 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:20:25,952 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:20:25,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:20:25,953 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:20:25,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:20:25,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:20:25,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:20:25,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:20:25,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:20:25,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:20:25,955 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:20:25,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:20:25,955 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:20:25,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:20:25,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:20:25,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:20:25,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:20:25,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:20:25,956 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:20:25,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:20:25,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:20:25,957 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:20:25,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:20:25,957 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:20:25,957 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:20:25,963 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_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f6ee705374b9304c4ad35807ad9bde4a154c7f85315159d7da4519e0aae9554 [2022-11-20 20:20:26,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:20:26,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:20:26,286 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:20:26,287 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:20:26,287 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:20:26,289 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i [2022-11-20 20:20:29,223 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:20:29,419 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:20:29,419 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i [2022-11-20 20:20:29,425 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/data/abb9ed6dd/95aef54c0df147d58fdc08a269880f25/FLAGe458e7f82 [2022-11-20 20:20:29,439 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/data/abb9ed6dd/95aef54c0df147d58fdc08a269880f25 [2022-11-20 20:20:29,442 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:20:29,444 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:20:29,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:20:29,445 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:20:29,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:20:29,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:20:29" (1/1) ... [2022-11-20 20:20:29,457 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79d12452 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:29, skipping insertion in model container [2022-11-20 20:20:29,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:20:29" (1/1) ... [2022-11-20 20:20:29,465 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:20:29,490 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:20:29,730 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_6a272afc-6228-4297-8889-35911e36a811/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i[950,963] [2022-11-20 20:20:29,761 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:20:29,774 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:20:29,790 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_6a272afc-6228-4297-8889-35911e36a811/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i[950,963] [2022-11-20 20:20:29,809 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:20:29,828 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:20:29,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:29 WrapperNode [2022-11-20 20:20:29,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:20:29,830 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:20:29,831 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:20:29,831 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:20:29,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:29" (1/1) ... [2022-11-20 20:20:29,848 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:29" (1/1) ... [2022-11-20 20:20:29,871 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2022-11-20 20:20:29,872 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:20:29,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:20:29,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:20:29,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:20:29,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:29" (1/1) ... [2022-11-20 20:20:29,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:29" (1/1) ... [2022-11-20 20:20:29,895 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:29" (1/1) ... [2022-11-20 20:20:29,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:29" (1/1) ... [2022-11-20 20:20:29,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:29" (1/1) ... [2022-11-20 20:20:29,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:29" (1/1) ... [2022-11-20 20:20:29,911 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:29" (1/1) ... [2022-11-20 20:20:29,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:29" (1/1) ... [2022-11-20 20:20:29,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:20:29,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:20:29,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:20:29,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:20:29,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:29" (1/1) ... [2022-11-20 20:20:29,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:20:29,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:20:29,956 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:20:29,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:20:30,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:20:30,009 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-20 20:20:30,009 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-20 20:20:30,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 20:20:30,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:20:30,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:20:30,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-20 20:20:30,010 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-20 20:20:30,084 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:20:30,086 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:20:30,253 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:20:30,293 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:20:30,293 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 20:20:30,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:20:30 BoogieIcfgContainer [2022-11-20 20:20:30,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:20:30,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:20:30,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:20:30,302 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:20:30,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:20:29" (1/3) ... [2022-11-20 20:20:30,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@716c2ea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:20:30, skipping insertion in model container [2022-11-20 20:20:30,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:29" (2/3) ... [2022-11-20 20:20:30,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@716c2ea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:20:30, skipping insertion in model container [2022-11-20 20:20:30,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:20:30" (3/3) ... [2022-11-20 20:20:30,306 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_valuebound2.i [2022-11-20 20:20:30,326 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:20:30,326 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:20:30,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:20:30,404 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;@413446f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:20:30,405 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:20:30,410 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 20:20:30,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 20:20:30,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:20:30,417 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:20:30,418 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:20:30,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:20:30,423 INFO L85 PathProgramCache]: Analyzing trace with hash 40099495, now seen corresponding path program 1 times [2022-11-20 20:20:30,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:20:30,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738973469] [2022-11-20 20:20:30,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:30,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:20:30,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:30,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:20:30,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738973469] [2022-11-20 20:20:30,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-20 20:20:30,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730448521] [2022-11-20 20:20:30,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:30,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:20:30,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:20:30,585 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:20:30,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 20:20:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:30,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-20 20:20:30,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:30,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 20:20:30,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:20:30,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730448521] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:20:30,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:20:30,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:20:30,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159146768] [2022-11-20 20:20:30,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:20:30,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 20:20:30,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:20:30,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 20:20:30,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 20:20:30,778 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 20:20:30,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:20:30,808 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2022-11-20 20:20:30,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 20:20:30,811 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 21 [2022-11-20 20:20:30,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:20:30,818 INFO L225 Difference]: With dead ends: 35 [2022-11-20 20:20:30,818 INFO L226 Difference]: Without dead ends: 21 [2022-11-20 20:20:30,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 20:20:30,824 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:20:30,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:20:30,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-20 20:20:30,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-20 20:20:30,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-20 20:20:30,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-11-20 20:20:30,883 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 21 [2022-11-20 20:20:30,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:20:30,885 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-11-20 20:20:30,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 20:20:30,885 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-11-20 20:20:30,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 20:20:30,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:20:30,887 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:20:30,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 20:20:31,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-20 20:20:31,095 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:20:31,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:20:31,096 INFO L85 PathProgramCache]: Analyzing trace with hash -2056079682, now seen corresponding path program 1 times [2022-11-20 20:20:31,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:20:31,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675998251] [2022-11-20 20:20:31,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:31,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:20:31,134 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 20:20:31,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330040027] [2022-11-20 20:20:31,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:31,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:20:31,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:20:31,137 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:20:31,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 20:20:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:31,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 20:20:31,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:31,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 20:20:31,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:20:31,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 20:20:31,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:20:31,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675998251] [2022-11-20 20:20:31,863 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 20:20:31,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330040027] [2022-11-20 20:20:31,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330040027] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 20:20:31,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:20:31,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2022-11-20 20:20:31,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188501120] [2022-11-20 20:20:31,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:20:31,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:20:31,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:20:31,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:20:31,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:20:31,878 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 20:20:33,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:20:33,215 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2022-11-20 20:20:33,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:20:33,216 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 22 [2022-11-20 20:20:33,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:20:33,217 INFO L225 Difference]: With dead ends: 33 [2022-11-20 20:20:33,218 INFO L226 Difference]: Without dead ends: 30 [2022-11-20 20:20:33,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-11-20 20:20:33,219 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:20:33,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 63 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 20:20:33,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-20 20:20:33,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-20 20:20:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 20:20:33,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-11-20 20:20:33,237 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 22 [2022-11-20 20:20:33,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:20:33,239 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-11-20 20:20:33,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 20:20:33,240 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-11-20 20:20:33,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 20:20:33,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:20:33,241 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:20:33,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 20:20:33,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:20:33,447 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:20:33,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:20:33,447 INFO L85 PathProgramCache]: Analyzing trace with hash 190159033, now seen corresponding path program 1 times [2022-11-20 20:20:33,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:20:33,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192589579] [2022-11-20 20:20:33,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:33,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:20:33,471 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 20:20:33,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1016149033] [2022-11-20 20:20:33,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:33,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:20:33,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:20:33,475 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:20:33,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 20:20:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:33,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 20:20:33,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 20:20:33,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:20:33,971 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 20:20:33,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:20:33,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192589579] [2022-11-20 20:20:33,972 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 20:20:33,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016149033] [2022-11-20 20:20:33,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016149033] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 20:20:33,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:20:33,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2022-11-20 20:20:33,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044245239] [2022-11-20 20:20:33,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:20:33,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:20:33,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:20:33,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:20:33,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:20:33,975 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 20:20:34,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:20:34,012 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2022-11-20 20:20:34,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:20:34,013 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 24 [2022-11-20 20:20:34,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:20:34,015 INFO L225 Difference]: With dead ends: 38 [2022-11-20 20:20:34,015 INFO L226 Difference]: Without dead ends: 36 [2022-11-20 20:20:34,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-20 20:20:34,017 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:20:34,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 98 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2022-11-20 20:20:34,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-20 20:20:34,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-20 20:20:34,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 25 states have internal predecessors, (27), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-20 20:20:34,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-11-20 20:20:34,027 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 24 [2022-11-20 20:20:34,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:20:34,027 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-11-20 20:20:34,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 20:20:34,028 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-11-20 20:20:34,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 20:20:34,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:20:34,029 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:20:34,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-20 20:20:34,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-20 20:20:34,234 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:20:34,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:20:34,235 INFO L85 PathProgramCache]: Analyzing trace with hash 2136592426, now seen corresponding path program 1 times [2022-11-20 20:20:34,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:20:34,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899287073] [2022-11-20 20:20:34,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:34,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:20:34,250 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 20:20:34,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563595392] [2022-11-20 20:20:34,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:34,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:20:34,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:20:34,252 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:20:34,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 20:20:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:34,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:20:34,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:34,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 20:20:34,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:20:34,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:20:34,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899287073] [2022-11-20 20:20:34,355 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 20:20:34,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563595392] [2022-11-20 20:20:34,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563595392] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:20:34,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:20:34,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:20:34,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306349402] [2022-11-20 20:20:34,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:20:34,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:20:34,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:20:34,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:20:34,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:20:34,357 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 20:20:34,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:20:34,387 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2022-11-20 20:20:34,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:20:34,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2022-11-20 20:20:34,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:20:34,388 INFO L225 Difference]: With dead ends: 46 [2022-11-20 20:20:34,388 INFO L226 Difference]: Without dead ends: 29 [2022-11-20 20:20:34,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:20:34,390 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:20:34,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:20:34,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-20 20:20:34,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-20 20:20:34,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 20:20:34,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-11-20 20:20:34,398 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 29 [2022-11-20 20:20:34,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:20:34,398 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-11-20 20:20:34,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 20:20:34,399 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-11-20 20:20:34,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 20:20:34,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:20:34,400 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:20:34,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-20 20:20:34,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:20:34,605 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:20:34,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:20:34,605 INFO L85 PathProgramCache]: Analyzing trace with hash 52881113, now seen corresponding path program 1 times [2022-11-20 20:20:34,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:20:34,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118555535] [2022-11-20 20:20:34,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:34,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:20:34,622 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 20:20:34,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1284214546] [2022-11-20 20:20:34,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:34,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:20:34,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:20:34,627 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:20:34,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 20:20:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:34,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 20:20:34,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:34,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 20:20:34,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:20:34,875 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 20:20:34,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:20:34,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118555535] [2022-11-20 20:20:34,875 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 20:20:34,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284214546] [2022-11-20 20:20:34,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284214546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:20:34,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1303376241] [2022-11-20 20:20:34,896 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-20 20:20:34,896 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:20:34,904 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:20:34,910 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:20:34,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:20:35,500 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2022-11-20 20:20:35,598 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 46 for LOIs [2022-11-20 20:20:35,618 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:20:36,766 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1044#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:20:36,766 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:20:36,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:20:36,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-11-20 20:20:36,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259303696] [2022-11-20 20:20:36,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 20:20:36,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 20:20:36,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:20:36,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 20:20:36,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-11-20 20:20:36,768 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-20 20:20:38,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 20:20:38,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:20:38,909 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-11-20 20:20:38,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:20:38,909 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 30 [2022-11-20 20:20:38,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:20:38,910 INFO L225 Difference]: With dead ends: 35 [2022-11-20 20:20:38,910 INFO L226 Difference]: Without dead ends: 28 [2022-11-20 20:20:38,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-11-20 20:20:38,912 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:20:38,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 105 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-11-20 20:20:38,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-20 20:20:38,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-20 20:20:38,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 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) [2022-11-20 20:20:38,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-11-20 20:20:38,919 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 30 [2022-11-20 20:20:38,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:20:38,919 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-11-20 20:20:38,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-20 20:20:38,919 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-11-20 20:20:38,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 20:20:38,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:20:38,920 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:20:38,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 20:20:39,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:20:39,121 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:20:39,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:20:39,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1183920689, now seen corresponding path program 1 times [2022-11-20 20:20:39,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:20:39,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336302275] [2022-11-20 20:20:39,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:39,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:20:39,138 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 20:20:39,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1861478695] [2022-11-20 20:20:39,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:39,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:20:39,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:20:39,144 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:20:39,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 20:20:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:39,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 20:20:39,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:40,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:20:40,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336302275] [2022-11-20 20:20:40,183 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 20:20:40,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861478695] [2022-11-20 20:20:40,183 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: cannot handle negative coefficients [2022-11-20 20:20:40,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1273547274] [2022-11-20 20:20:40,185 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-20 20:20:40,186 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:20:40,186 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:20:40,186 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:20:40,187 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:20:41,536 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2022-11-20 20:20:41,591 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 46 for LOIs [2022-11-20 20:20:41,604 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:20:42,789 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1247#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:20:42,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:20:42,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:20:42,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2022-11-20 20:20:42,789 ERROR L170 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2022-11-20 20:20:42,790 INFO L359 BasicCegarLoop]: Counterexample might be feasible [2022-11-20 20:20:42,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 20:20:42,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 20:20:42,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:20:43,001 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-20 20:20:43,004 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 20:20:43,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 08:20:43 BoogieIcfgContainer [2022-11-20 20:20:43,025 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 20:20:43,026 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 20:20:43,026 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 20:20:43,026 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 20:20:43,026 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:20:30" (3/4) ... [2022-11-20 20:20:43,029 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-20 20:20:43,029 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 20:20:43,030 INFO L158 Benchmark]: Toolchain (without parser) took 13586.50ms. Allocated memory was 172.0MB in the beginning and 207.6MB in the end (delta: 35.7MB). Free memory was 141.6MB in the beginning and 146.4MB in the end (delta: -4.8MB). Peak memory consumption was 31.4MB. Max. memory is 16.1GB. [2022-11-20 20:20:43,030 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 130.0MB. Free memory is still 98.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 20:20:43,032 INFO L158 Benchmark]: CACSL2BoogieTranslator took 384.34ms. Allocated memory is still 172.0MB. Free memory was 141.6MB in the beginning and 137.1MB in the end (delta: 4.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-20 20:20:43,032 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.52ms. Allocated memory is still 172.0MB. Free memory was 137.1MB in the beginning and 135.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 20:20:43,033 INFO L158 Benchmark]: Boogie Preprocessor took 46.95ms. Allocated memory is still 172.0MB. Free memory was 135.2MB in the beginning and 134.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 20:20:43,035 INFO L158 Benchmark]: RCFGBuilder took 376.30ms. Allocated memory is still 172.0MB. Free memory was 134.1MB in the beginning and 121.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-20 20:20:43,035 INFO L158 Benchmark]: TraceAbstraction took 12726.33ms. Allocated memory was 172.0MB in the beginning and 207.6MB in the end (delta: 35.7MB). Free memory was 120.6MB in the beginning and 146.4MB in the end (delta: -25.8MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. [2022-11-20 20:20:43,036 INFO L158 Benchmark]: Witness Printer took 3.91ms. Allocated memory is still 207.6MB. Free memory is still 146.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 20:20:43,038 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 130.0MB. Free memory is still 98.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 384.34ms. Allocated memory is still 172.0MB. Free memory was 141.6MB in the beginning and 137.1MB in the end (delta: 4.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.52ms. Allocated memory is still 172.0MB. Free memory was 137.1MB in the beginning and 135.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 46.95ms. Allocated memory is still 172.0MB. Free memory was 135.2MB in the beginning and 134.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 376.30ms. Allocated memory is still 172.0MB. Free memory was 134.1MB in the beginning and 121.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 12726.33ms. Allocated memory was 172.0MB in the beginning and 207.6MB in the end (delta: 35.7MB). Free memory was 120.6MB in the beginning and 146.4MB in the end (delta: -25.8MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. * Witness Printer took 3.91ms. Allocated memory is still 207.6MB. Free memory is still 146.4MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L26] unsigned A, B; [L27] unsigned q, r, b; [L28] A = __VERIFIER_nondet_uint() [L29] CALL assume_abort_if_not(A>=0 && A<=2) [L16] COND FALSE !(!cond) [L29] RET assume_abort_if_not(A>=0 && A<=2) [L30] B = __VERIFIER_nondet_uint() [L31] CALL assume_abort_if_not(B>=0 && B<=2) [L16] COND FALSE !(!cond) [L31] RET assume_abort_if_not(B>=0 && B<=2) [L32] CALL assume_abort_if_not(B < (0x7fffffff * 2U + 1U)/2) [L16] COND FALSE !(!cond) [L32] RET assume_abort_if_not(B < (0x7fffffff * 2U + 1U)/2) [L33] CALL assume_abort_if_not(B >= 1) [L16] COND FALSE !(!cond) [L33] RET assume_abort_if_not(B >= 1) [L34] q = 0 [L35] r = A [L36] b = B [L37] COND TRUE 1 [L38] COND FALSE !(!(r >= b)) [L39] b = 2 * b [L37] COND TRUE 1 [L38] COND TRUE !(r >= b) [L41] COND TRUE 1 [L42] CALL __VERIFIER_assert(A == q * b + r) [L19] COND FALSE !(!(cond)) [L42] RET __VERIFIER_assert(A == q * b + r) [L43] COND FALSE !(!(b != B)) [L44] q = 2 * q [L45] b = b / 2 [L46] COND FALSE !(r >= b) [L41] COND TRUE 1 [L42] CALL __VERIFIER_assert(A == q * b + r) [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 12.6s, OverallIterations: 6, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 29 SdHoareTripleChecker+Valid, 3.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 28 mSDsluCounter, 325 SdHoareTripleChecker+Invalid, 3.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 14 IncrementalHoareTripleChecker+Unchecked, 217 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 143 IncrementalHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 108 mSDtfsCounter, 143 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 228 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=3, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 178 NumberOfCodeBlocks, 178 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 194 ConstructedInterpolants, 6 QuantifiedInterpolants, 665 SizeOfPredicates, 11 NumberOfNonLiveVariables, 488 ConjunctsInSsa, 103 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 104/112 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 [2022-11-20 20:20:43,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/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_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1f6ee705374b9304c4ad35807ad9bde4a154c7f85315159d7da4519e0aae9554 --- 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-6b4ec56 [2022-11-20 20:20:45,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:20:45,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:20:45,446 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:20:45,447 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:20:45,448 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:20:45,449 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:20:45,451 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:20:45,452 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:20:45,453 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:20:45,454 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:20:45,455 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:20:45,456 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:20:45,457 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:20:45,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:20:45,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:20:45,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:20:45,461 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:20:45,462 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:20:45,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:20:45,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:20:45,470 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:20:45,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:20:45,472 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:20:45,481 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:20:45,482 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:20:45,482 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:20:45,483 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:20:45,483 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:20:45,484 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:20:45,484 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:20:45,485 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:20:45,486 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:20:45,487 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:20:45,488 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:20:45,488 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:20:45,489 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:20:45,489 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:20:45,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:20:45,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:20:45,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:20:45,496 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-20 20:20:45,538 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:20:45,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:20:45,540 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:20:45,540 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:20:45,541 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:20:45,541 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:20:45,541 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:20:45,541 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:20:45,542 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:20:45,542 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:20:45,543 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:20:45,543 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:20:45,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:20:45,544 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:20:45,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:20:45,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:20:45,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:20:45,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:20:45,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:20:45,545 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 20:20:45,545 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 20:20:45,545 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 20:20:45,545 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:20:45,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:20:45,546 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:20:45,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:20:45,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:20:45,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 20:20:45,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:20:45,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:20:45,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:20:45,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:20:45,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:20:45,548 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-20 20:20:45,548 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 20:20:45,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:20:45,548 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:20:45,548 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 20:20:45,549 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_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f6ee705374b9304c4ad35807ad9bde4a154c7f85315159d7da4519e0aae9554 [2022-11-20 20:20:45,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:20:45,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:20:45,971 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:20:45,973 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:20:45,973 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:20:45,975 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i [2022-11-20 20:20:49,085 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:20:49,280 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:20:49,281 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i [2022-11-20 20:20:49,289 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/data/b38599263/46fa288f5fd745629ab7c50e60afed36/FLAGd949e2650 [2022-11-20 20:20:49,310 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/data/b38599263/46fa288f5fd745629ab7c50e60afed36 [2022-11-20 20:20:49,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:20:49,314 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:20:49,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:20:49,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:20:49,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:20:49,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:20:49" (1/1) ... [2022-11-20 20:20:49,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57213457 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:49, skipping insertion in model container [2022-11-20 20:20:49,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:20:49" (1/1) ... [2022-11-20 20:20:49,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:20:49,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:20:49,498 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_6a272afc-6228-4297-8889-35911e36a811/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i[950,963] [2022-11-20 20:20:49,515 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:20:49,529 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:20:49,542 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_6a272afc-6228-4297-8889-35911e36a811/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i[950,963] [2022-11-20 20:20:49,548 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:20:49,562 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:20:49,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:49 WrapperNode [2022-11-20 20:20:49,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:20:49,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:20:49,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:20:49,564 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:20:49,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:49" (1/1) ... [2022-11-20 20:20:49,580 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:49" (1/1) ... [2022-11-20 20:20:49,597 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2022-11-20 20:20:49,597 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:20:49,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:20:49,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:20:49,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:20:49,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:49" (1/1) ... [2022-11-20 20:20:49,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:49" (1/1) ... [2022-11-20 20:20:49,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:49" (1/1) ... [2022-11-20 20:20:49,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:49" (1/1) ... [2022-11-20 20:20:49,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:49" (1/1) ... [2022-11-20 20:20:49,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:49" (1/1) ... [2022-11-20 20:20:49,620 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:49" (1/1) ... [2022-11-20 20:20:49,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:49" (1/1) ... [2022-11-20 20:20:49,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:20:49,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:20:49,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:20:49,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:20:49,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:49" (1/1) ... [2022-11-20 20:20:49,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:20:49,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:20:49,656 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:20:49,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:20:49,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:20:49,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 20:20:49,715 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-20 20:20:49,715 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-20 20:20:49,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:20:49,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:20:49,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-20 20:20:49,716 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-20 20:20:49,801 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:20:49,803 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:20:50,059 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:20:50,065 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:20:50,065 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 20:20:50,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:20:50 BoogieIcfgContainer [2022-11-20 20:20:50,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:20:50,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:20:50,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:20:50,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:20:50,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:20:49" (1/3) ... [2022-11-20 20:20:50,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44c29986 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:20:50, skipping insertion in model container [2022-11-20 20:20:50,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:20:49" (2/3) ... [2022-11-20 20:20:50,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44c29986 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:20:50, skipping insertion in model container [2022-11-20 20:20:50,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:20:50" (3/3) ... [2022-11-20 20:20:50,093 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_valuebound2.i [2022-11-20 20:20:50,112 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:20:50,112 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:20:50,160 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:20:50,166 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;@59011ff3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:20:50,167 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:20:50,171 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 20:20:50,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 20:20:50,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:20:50,180 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:20:50,180 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:20:50,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:20:50,186 INFO L85 PathProgramCache]: Analyzing trace with hash 913242413, now seen corresponding path program 1 times [2022-11-20 20:20:50,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:20:50,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819848992] [2022-11-20 20:20:50,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:50,200 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 [2022-11-20 20:20:50,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:20:50,205 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 20:20:50,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:20:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:50,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-20 20:20:50,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:50,337 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 20:20:50,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:20:50,338 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:20:50,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819848992] [2022-11-20 20:20:50,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819848992] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:20:50,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:20:50,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:20:50,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034196777] [2022-11-20 20:20:50,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:20:50,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 20:20:50,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:20:50,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 20:20:50,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 20:20:50,381 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 20:20:50,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:20:50,414 INFO L93 Difference]: Finished difference Result 55 states and 84 transitions. [2022-11-20 20:20:50,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 20:20:50,416 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2022-11-20 20:20:50,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:20:50,423 INFO L225 Difference]: With dead ends: 55 [2022-11-20 20:20:50,424 INFO L226 Difference]: Without dead ends: 25 [2022-11-20 20:20:50,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 20:20:50,431 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:20:50,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:20:50,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-20 20:20:50,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-20 20:20:50,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-20 20:20:50,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-11-20 20:20:50,468 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 30 [2022-11-20 20:20:50,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:20:50,468 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-11-20 20:20:50,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 20:20:50,469 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-11-20 20:20:50,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 20:20:50,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:20:50,470 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:20:50,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:20:50,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:20:50,683 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:20:50,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:20:50,684 INFO L85 PathProgramCache]: Analyzing trace with hash -2061833476, now seen corresponding path program 1 times [2022-11-20 20:20:50,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:20:50,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123984266] [2022-11-20 20:20:50,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:50,685 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 [2022-11-20 20:20:50,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:20:50,686 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 20:20:50,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:20:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:50,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 20:20:50,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:51,101 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 20:20:51,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:20:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 20:20:51,610 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:20:51,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123984266] [2022-11-20 20:20:51,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123984266] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 20:20:51,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:20:51,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-11-20 20:20:51,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278981447] [2022-11-20 20:20:51,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:20:51,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:20:51,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:20:51,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:20:51,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:20:51,615 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 20:20:51,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:20:51,734 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-11-20 20:20:51,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:20:51,739 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2022-11-20 20:20:51,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:20:51,741 INFO L225 Difference]: With dead ends: 35 [2022-11-20 20:20:51,741 INFO L226 Difference]: Without dead ends: 33 [2022-11-20 20:20:51,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:20:51,743 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:20:51,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 99 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2022-11-20 20:20:51,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-20 20:20:51,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-20 20:20:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 24 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 20:20:51,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-11-20 20:20:51,754 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 31 [2022-11-20 20:20:51,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:20:51,760 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-11-20 20:20:51,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 20:20:51,763 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-11-20 20:20:51,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-20 20:20:51,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:20:51,765 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:20:51,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:20:51,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:20:51,977 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:20:51,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:20:51,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1044269705, now seen corresponding path program 1 times [2022-11-20 20:20:51,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:20:51,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166360744] [2022-11-20 20:20:51,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:51,978 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 [2022-11-20 20:20:51,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:20:51,980 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 20:20:52,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:20:52,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:52,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 20:20:52,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 20:20:52,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:20:52,896 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 20:20:52,896 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:20:52,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1166360744] [2022-11-20 20:20:52,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1166360744] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 20:20:52,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:20:52,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-11-20 20:20:52,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996026359] [2022-11-20 20:20:52,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:20:52,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:20:52,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:20:52,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:20:52,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:20:52,899 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 20:20:53,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:20:53,030 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-11-20 20:20:53,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:20:53,034 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2022-11-20 20:20:53,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:20:53,035 INFO L225 Difference]: With dead ends: 41 [2022-11-20 20:20:53,035 INFO L226 Difference]: Without dead ends: 39 [2022-11-20 20:20:53,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:20:53,037 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:20:53,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 97 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2022-11-20 20:20:53,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-20 20:20:53,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2022-11-20 20:20:53,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 20:20:53,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-11-20 20:20:53,046 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 33 [2022-11-20 20:20:53,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:20:53,052 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-11-20 20:20:53,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 20:20:53,052 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-11-20 20:20:53,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 20:20:53,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:20:53,055 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:20:53,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-20 20:20:53,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:20:53,271 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:20:53,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:20:53,272 INFO L85 PathProgramCache]: Analyzing trace with hash -328713508, now seen corresponding path program 1 times [2022-11-20 20:20:53,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:20:53,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642851452] [2022-11-20 20:20:53,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:53,273 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:20:53,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:20:53,282 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 20:20:53,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:20:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:53,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:20:53,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:53,779 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 20:20:53,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:20:54,261 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 20:20:54,265 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:20:54,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642851452] [2022-11-20 20:20:54,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642851452] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:20:54,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [447470787] [2022-11-20 20:20:54,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:54,267 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:20:54,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:20:54,277 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:20:54,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-11-20 20:20:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:54,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 20:20:54,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 20:20:54,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:20:54,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [447470787] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:20:54,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:20:54,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 10 [2022-11-20 20:20:54,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778375899] [2022-11-20 20:20:54,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:20:54,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:20:54,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:20:54,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:20:54,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:20:54,491 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 20:20:54,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:20:54,716 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2022-11-20 20:20:54,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:20:54,717 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-11-20 20:20:54,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:20:54,718 INFO L225 Difference]: With dead ends: 42 [2022-11-20 20:20:54,718 INFO L226 Difference]: Without dead ends: 39 [2022-11-20 20:20:54,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:20:54,720 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:20:54,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 86 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:20:54,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-20 20:20:54,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2022-11-20 20:20:54,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 20:20:54,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-11-20 20:20:54,729 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 37 [2022-11-20 20:20:54,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:20:54,729 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-11-20 20:20:54,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 20:20:54,730 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-11-20 20:20:54,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 20:20:54,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:20:54,731 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:20:54,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:20:54,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-11-20 20:20:55,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:20:55,142 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:20:55,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:20:55,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1786164585, now seen corresponding path program 1 times [2022-11-20 20:20:55,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:20:55,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217798798] [2022-11-20 20:20:55,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:55,144 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 [2022-11-20 20:20:55,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:20:55,146 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 20:20:55,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-20 20:20:55,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:55,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:20:55,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:55,251 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 20:20:55,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:20:55,252 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:20:55,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217798798] [2022-11-20 20:20:55,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [217798798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:20:55,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:20:55,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:20:55,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201895103] [2022-11-20 20:20:55,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:20:55,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:20:55,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:20:55,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:20:55,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:20:55,259 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 20:20:55,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:20:55,330 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2022-11-20 20:20:55,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:20:55,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-11-20 20:20:55,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:20:55,335 INFO L225 Difference]: With dead ends: 57 [2022-11-20 20:20:55,335 INFO L226 Difference]: Without dead ends: 35 [2022-11-20 20:20:55,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:20:55,336 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:20:55,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:20:55,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-20 20:20:55,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-20 20:20:55,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 20:20:55,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2022-11-20 20:20:55,345 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 39 [2022-11-20 20:20:55,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:20:55,345 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2022-11-20 20:20:55,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 20:20:55,346 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2022-11-20 20:20:55,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 20:20:55,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:20:55,347 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:20:55,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-20 20:20:55,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:20:55,560 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:20:55,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:20:55,560 INFO L85 PathProgramCache]: Analyzing trace with hash 145189394, now seen corresponding path program 1 times [2022-11-20 20:20:55,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:20:55,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73484330] [2022-11-20 20:20:55,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:55,561 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 [2022-11-20 20:20:55,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:20:55,562 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 20:20:55,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-20 20:20:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:55,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 20:20:55,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:56,448 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 20:20:56,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:20:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 20:20:59,080 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:20:59,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73484330] [2022-11-20 20:20:59,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73484330] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:20:59,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [522852032] [2022-11-20 20:20:59,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:59,080 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:20:59,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:20:59,083 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:20:59,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-20 20:20:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:59,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 20:20:59,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:59,694 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 20:20:59,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:21:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 20:21:00,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [522852032] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:21:00,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192990581] [2022-11-20 20:21:00,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:21:00,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:21:00,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:21:00,977 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:21:00,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 20:21:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:21:01,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 20:21:01,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:21:01,525 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 20:21:01,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:21:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 20:21:04,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192990581] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:21:04,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:21:04,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8, 7, 14, 9] total 28 [2022-11-20 20:21:04,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764287303] [2022-11-20 20:21:04,425 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:21:04,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 20:21:04,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:21:04,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 20:21:04,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2022-11-20 20:21:04,427 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-20 20:21:06,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:21:06,755 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2022-11-20 20:21:06,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 20:21:06,756 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) Word has length 41 [2022-11-20 20:21:06,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:21:06,757 INFO L225 Difference]: With dead ends: 61 [2022-11-20 20:21:06,757 INFO L226 Difference]: Without dead ends: 59 [2022-11-20 20:21:06,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 209 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2022-11-20 20:21:06,759 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 32 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:21:06,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 180 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 175 Invalid, 0 Unknown, 23 Unchecked, 1.8s Time] [2022-11-20 20:21:06,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-20 20:21:06,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2022-11-20 20:21:06,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 36 states have internal predecessors, (40), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 20:21:06,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-11-20 20:21:06,772 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 41 [2022-11-20 20:21:06,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:21:06,772 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-11-20 20:21:06,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-20 20:21:06,773 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-11-20 20:21:06,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 20:21:06,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:21:06,774 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:21:06,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2022-11-20 20:21:06,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-20 20:21:07,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-20 20:21:07,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:21:07,378 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:21:07,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:21:07,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1512214898, now seen corresponding path program 1 times [2022-11-20 20:21:07,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:21:07,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1761530100] [2022-11-20 20:21:07,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:21:07,379 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 [2022-11-20 20:21:07,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:21:07,380 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 20:21:07,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-20 20:21:07,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:21:07,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:21:07,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:21:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 20:21:07,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:21:08,426 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 20:21:08,427 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:21:08,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1761530100] [2022-11-20 20:21:08,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1761530100] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:21:08,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1010812937] [2022-11-20 20:21:08,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:21:08,428 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:21:08,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:21:08,431 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:21:08,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-20 20:21:08,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:21:08,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 20:21:08,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:21:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 20:21:10,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:21:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 20:21:11,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1010812937] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:21:11,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878114851] [2022-11-20 20:21:11,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:21:11,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:21:11,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:21:11,503 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:21:11,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 20:21:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:21:11,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:21:11,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:21:11,685 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 20:21:11,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:21:12,081 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 20:21:12,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878114851] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:21:12,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:21:12,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8, 7, 7, 6] total 15 [2022-11-20 20:21:12,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436796718] [2022-11-20 20:21:12,082 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:21:12,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 20:21:12,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:21:12,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 20:21:12,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-11-20 20:21:12,084 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-20 20:21:12,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:21:12,798 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2022-11-20 20:21:12,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 20:21:12,799 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 47 [2022-11-20 20:21:12,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:21:12,802 INFO L225 Difference]: With dead ends: 57 [2022-11-20 20:21:12,802 INFO L226 Difference]: Without dead ends: 49 [2022-11-20 20:21:12,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 20:21:12,804 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:21:12,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 182 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 31 Unchecked, 0.5s Time] [2022-11-20 20:21:12,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-20 20:21:12,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-11-20 20:21:12,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 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) [2022-11-20 20:21:12,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-11-20 20:21:12,815 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 47 [2022-11-20 20:21:12,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:21:12,816 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-11-20 20:21:12,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-20 20:21:12,816 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-11-20 20:21:12,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-20 20:21:12,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:21:12,818 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:21:12,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-20 20:21:13,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 20:21:13,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-20 20:21:13,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -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_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:21:13,430 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:21:13,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:21:13,431 INFO L85 PathProgramCache]: Analyzing trace with hash 2114474925, now seen corresponding path program 2 times [2022-11-20 20:21:13,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:21:13,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162500560] [2022-11-20 20:21:13,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:21:13,432 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 [2022-11-20 20:21:13,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:21:13,433 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 20:21:13,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-20 20:21:13,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:21:13,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:21:13,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:21:13,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:21:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 20:21:13,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:21:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 20:21:14,637 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:21:14,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162500560] [2022-11-20 20:21:14,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162500560] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:21:14,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1222562232] [2022-11-20 20:21:14,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:21:14,638 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:21:14,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:21:14,643 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:21:14,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-20 20:21:14,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:21:14,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:21:14,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:21:14,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:21:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 20:21:15,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:21:15,564 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 20:21:15,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1222562232] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:21:15,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364363158] [2022-11-20 20:21:15,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:21:15,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:21:15,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:21:15,569 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:21:15,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 20:21:15,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:21:15,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:21:15,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:21:15,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:21:16,046 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 20:21:16,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:21:16,450 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 20:21:16,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364363158] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:21:16,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:21:16,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12, 7, 8, 9] total 30 [2022-11-20 20:21:16,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198346028] [2022-11-20 20:21:16,451 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:21:16,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 20:21:16,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:21:16,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 20:21:16,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2022-11-20 20:21:16,453 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 30 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 24 states have internal predecessors, (65), 14 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (23), 15 states have call predecessors, (23), 13 states have call successors, (23) [2022-11-20 20:21:17,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:21:17,741 INFO L93 Difference]: Finished difference Result 97 states and 118 transitions. [2022-11-20 20:21:17,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 20:21:17,744 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 24 states have internal predecessors, (65), 14 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (23), 15 states have call predecessors, (23), 13 states have call successors, (23) Word has length 49 [2022-11-20 20:21:17,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:21:17,745 INFO L225 Difference]: With dead ends: 97 [2022-11-20 20:21:17,746 INFO L226 Difference]: Without dead ends: 62 [2022-11-20 20:21:17,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 257 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=373, Invalid=1267, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 20:21:17,748 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 62 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:21:17,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 151 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 20:21:17,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-20 20:21:17,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2022-11-20 20:21:17,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.15) internal successors, (46), 41 states have internal predecessors, (46), 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) [2022-11-20 20:21:17,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-11-20 20:21:17,763 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 49 [2022-11-20 20:21:17,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:21:17,764 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-11-20 20:21:17,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 24 states have internal predecessors, (65), 14 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (23), 15 states have call predecessors, (23), 13 states have call successors, (23) [2022-11-20 20:21:17,765 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-11-20 20:21:17,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 20:21:17,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:21:17,766 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:21:17,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-20 20:21:17,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-20 20:21:18,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-20 20:21:18,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:21:18,375 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:21:18,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:21:18,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1596822888, now seen corresponding path program 3 times [2022-11-20 20:21:18,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:21:18,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517291458] [2022-11-20 20:21:18,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:21:18,376 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 [2022-11-20 20:21:18,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:21:18,376 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 20:21:18,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-20 20:21:18,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 20:21:18,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:21:18,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:21:18,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:21:26,815 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 13 refuted. 2 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 20:21:26,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:21:28,082 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:21:28,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517291458] [2022-11-20 20:21:28,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517291458] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:21:28,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1864320948] [2022-11-20 20:21:28,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:21:28,083 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:21:28,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:21:28,091 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:21:28,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-20 20:21:28,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 20:21:28,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:21:28,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:21:28,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:21:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 20:21:30,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:21:34,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1864320948] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:21:34,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759899817] [2022-11-20 20:21:34,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:21:34,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:21:34,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:21:34,297 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:21:34,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 20:21:34,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 20:21:34,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:21:34,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 20:21:34,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:21:36,775 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 20:21:36,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:21:37,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759899817] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:21:37,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:21:37,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 16] total 26 [2022-11-20 20:21:37,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805588039] [2022-11-20 20:21:37,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:21:37,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 20:21:37,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:21:37,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 20:21:37,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1022, Unknown=3, NotChecked=0, Total=1260 [2022-11-20 20:21:37,214 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 26 states, 25 states have (on average 2.12) internal successors, (53), 23 states have internal predecessors, (53), 9 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-20 20:21:37,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:21:37,991 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2022-11-20 20:21:37,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 20:21:37,992 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 23 states have internal predecessors, (53), 9 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 51 [2022-11-20 20:21:37,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:21:37,994 INFO L225 Difference]: With dead ends: 68 [2022-11-20 20:21:37,994 INFO L226 Difference]: Without dead ends: 58 [2022-11-20 20:21:37,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 159 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=301, Invalid=1336, Unknown=3, NotChecked=0, Total=1640 [2022-11-20 20:21:37,995 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:21:37,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 128 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 115 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-11-20 20:21:37,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-20 20:21:38,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2022-11-20 20:21:38,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 42 states have internal predecessors, (48), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 20:21:38,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2022-11-20 20:21:38,010 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 51 [2022-11-20 20:21:38,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:21:38,010 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2022-11-20 20:21:38,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 23 states have internal predecessors, (53), 9 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-20 20:21:38,011 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2022-11-20 20:21:38,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 20:21:38,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:21:38,012 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:21:38,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 20:21:38,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-20 20:21:38,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-20 20:21:38,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:21:38,621 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:21:38,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:21:38,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1654081190, now seen corresponding path program 1 times [2022-11-20 20:21:38,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:21:38,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207394879] [2022-11-20 20:21:38,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:21:38,622 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 [2022-11-20 20:21:38,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:21:38,623 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 20:21:38,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -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)] Waiting until timeout for monitored process [2022-11-20 20:21:38,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:21:38,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 20:21:38,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:21:39,923 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 20:21:39,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:21:49,128 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 20:21:49,128 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:21:49,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207394879] [2022-11-20 20:21:49,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207394879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:21:49,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1779306809] [2022-11-20 20:21:49,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:21:49,129 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:21:49,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:21:49,131 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:21:49,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-20 20:21:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:21:49,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:21:49,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:21:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 17 refuted. 2 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 20:21:54,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 20:22:03,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1779306809] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:03,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677355701] [2022-11-20 20:22:03,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:03,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:22:03,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:22:03,600 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:22:03,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 20:22:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:03,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 20:22:03,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:04,410 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 20:22:04,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:27,848 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 20:22:27,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677355701] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:27,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:22:27,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 14, 11, 16, 12] total 38 [2022-11-20 20:22:27,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113831567] [2022-11-20 20:22:27,849 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:22:27,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-20 20:22:27,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:22:27,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-20 20:22:27,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1130, Unknown=9, NotChecked=0, Total=1406 [2022-11-20 20:22:27,851 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 36 states have internal predecessors, (83), 15 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (22), 10 states have call predecessors, (22), 13 states have call successors, (22) [2022-11-20 20:22:49,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:49,472 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2022-11-20 20:22:49,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 20:22:49,473 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 36 states have internal predecessors, (83), 15 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (22), 10 states have call predecessors, (22), 13 states have call successors, (22) Word has length 51 [2022-11-20 20:22:49,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:49,474 INFO L225 Difference]: With dead ends: 84 [2022-11-20 20:22:49,474 INFO L226 Difference]: Without dead ends: 82 [2022-11-20 20:22:49,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 262 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 51.8s TimeCoverageRelationStatistics Valid=432, Invalid=1814, Unknown=10, NotChecked=0, Total=2256 [2022-11-20 20:22:49,477 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 64 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:49,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 264 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 347 Invalid, 0 Unknown, 79 Unchecked, 9.0s Time] [2022-11-20 20:22:49,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-20 20:22:49,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2022-11-20 20:22:49,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 53 states have internal predecessors, (60), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-20 20:22:49,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2022-11-20 20:22:49,494 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 51 [2022-11-20 20:22:49,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:49,495 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2022-11-20 20:22:49,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 36 states have internal predecessors, (83), 15 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (22), 10 states have call predecessors, (22), 13 states have call successors, (22) [2022-11-20 20:22:49,495 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2022-11-20 20:22:49,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 20:22:49,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:49,496 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:22:49,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:49,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:49,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:50,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:22:50,107 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:22:50,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:50,108 INFO L85 PathProgramCache]: Analyzing trace with hash 585705638, now seen corresponding path program 2 times [2022-11-20 20:22:50,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:22:50,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2017327131] [2022-11-20 20:22:50,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:22:50,108 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 [2022-11-20 20:22:50,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:22:50,109 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 20:22:50,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -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)] Waiting until timeout for monitored process [2022-11-20 20:22:50,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:22:50,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:22:50,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:22:50,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 20:22:50,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:50,964 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-20 20:22:50,964 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:22:50,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2017327131] [2022-11-20 20:22:50,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2017327131] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 20:22:50,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:22:50,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2022-11-20 20:22:50,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628362709] [2022-11-20 20:22:50,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:22:50,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:22:50,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:22:50,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:22:50,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:22:50,966 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-20 20:22:51,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:51,101 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2022-11-20 20:22:51,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:22:51,102 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 51 [2022-11-20 20:22:51,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:51,104 INFO L225 Difference]: With dead ends: 80 [2022-11-20 20:22:51,104 INFO L226 Difference]: Without dead ends: 62 [2022-11-20 20:22:51,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:22:51,106 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:51,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:22:51,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-20 20:22:51,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-11-20 20:22:51,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 47 states have internal predecessors, (52), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 20:22:51,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-11-20 20:22:51,123 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 51 [2022-11-20 20:22:51,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:51,124 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-11-20 20:22:51,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-20 20:22:51,125 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-11-20 20:22:51,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 20:22:51,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:51,128 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:22:51,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:51,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:22:51,340 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:22:51,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:51,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1287103, now seen corresponding path program 3 times [2022-11-20 20:22:51,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:22:51,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1192835868] [2022-11-20 20:22:51,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:22:51,341 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 [2022-11-20 20:22:51,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:22:51,342 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 20:22:51,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:22:51,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 20:22:51,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:22:51,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:22:51,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:52,296 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 20:22:52,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:53,377 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 20:22:53,377 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:22:53,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1192835868] [2022-11-20 20:22:53,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1192835868] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:53,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [629060316] [2022-11-20 20:22:53,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:22:53,378 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:22:53,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:22:53,379 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:22:53,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-20 20:22:53,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 20:22:53,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:22:53,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:22:53,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 20:22:54,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:54,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [629060316] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:22:54,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507236978] [2022-11-20 20:22:54,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:22:54,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:22:54,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:22:54,415 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:22:54,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-20 20:22:54,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 20:22:54,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:22:54,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 20:22:54,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 20:22:55,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 20:22:57,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507236978] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:57,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2022-11-20 20:22:57,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12, 13, 13] total 36 [2022-11-20 20:22:57,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92800167] [2022-11-20 20:22:57,376 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2022-11-20 20:22:57,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 20:22:57,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:22:57,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 20:22:57,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 20:22:57,378 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 36 states, 33 states have (on average 2.272727272727273) internal successors, (75), 28 states have internal predecessors, (75), 17 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (25), 19 states have call predecessors, (25), 16 states have call successors, (25) [2022-11-20 20:22:59,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:59,068 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2022-11-20 20:22:59,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 20:22:59,072 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.272727272727273) internal successors, (75), 28 states have internal predecessors, (75), 17 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (25), 19 states have call predecessors, (25), 16 states have call successors, (25) Word has length 59 [2022-11-20 20:22:59,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:59,072 INFO L225 Difference]: With dead ends: 87 [2022-11-20 20:22:59,072 INFO L226 Difference]: Without dead ends: 0 [2022-11-20 20:22:59,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 290 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=384, Invalid=1596, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 20:22:59,074 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 91 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:59,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 169 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 20:22:59,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-20 20:22:59,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-20 20:22:59,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:59,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-20 20:22:59,075 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 59 [2022-11-20 20:22:59,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:59,075 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-20 20:22:59,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.272727272727273) internal successors, (75), 28 states have internal predecessors, (75), 17 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (25), 19 states have call predecessors, (25), 16 states have call successors, (25) [2022-11-20 20:22:59,076 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-20 20:22:59,076 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-20 20:22:59,078 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 20:22:59,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:22:59,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:59,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:59,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/mathsat -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_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:22:59,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-20 20:23:03,729 INFO L899 garLoopResultBuilder]: For program point L33(line 33) no Hoare annotation was computed. [2022-11-20 20:23:03,729 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-20 20:23:03,729 INFO L895 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (bvule |ULTIMATE.start_main_~A~0#1| (_ bv2 32)) [2022-11-20 20:23:03,729 INFO L895 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (and (bvule |ULTIMATE.start_main_~B~0#1| (_ bv2 32)) (bvule |ULTIMATE.start_main_~A~0#1| (_ bv2 32))) [2022-11-20 20:23:03,729 INFO L902 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: true [2022-11-20 20:23:03,729 INFO L899 garLoopResultBuilder]: For program point L29-1(line 29) no Hoare annotation was computed. [2022-11-20 20:23:03,729 INFO L902 garLoopResultBuilder]: At program point L52(lines 25 53) the Hoare annotation is: true [2022-11-20 20:23:03,730 INFO L899 garLoopResultBuilder]: For program point L46(lines 46 49) no Hoare annotation was computed. [2022-11-20 20:23:03,730 INFO L895 garLoopResultBuilder]: At program point L46-2(lines 25 53) the Hoare annotation is: (let ((.cse11 (bvmul |ULTIMATE.start_main_~B~0#1| (_ bv2 32)))) (let ((.cse2 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~B~0#1|)) (.cse6 (bvuge |ULTIMATE.start_main_~B~0#1| (_ bv1 32))) (.cse3 (bvule |ULTIMATE.start_main_~B~0#1| (_ bv2 32))) (.cse0 (= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~A~0#1|)) (.cse1 (= |ULTIMATE.start_main_~q~0#1| (_ bv0 32))) (.cse5 (bvudiv .cse11 (_ bv2 32))) (.cse4 (exists ((|v_ULTIMATE.start_main_~b~0#1_27| (_ BitVec 32))) (= (bvudiv (bvmul (_ bv2 32) |v_ULTIMATE.start_main_~b~0#1_27|) (_ bv2 32)) |ULTIMATE.start_main_~b~0#1|))) (.cse10 (bvmul (_ bv4 32) |ULTIMATE.start_main_~B~0#1|)) (.cse7 (= |ULTIMATE.start_main_~r~0#1| (bvadd (bvneg |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~A~0#1|))) (.cse8 (= |ULTIMATE.start_main_~q~0#1| (_ bv1 32))) (.cse9 (bvule |ULTIMATE.start_main_~A~0#1| (_ bv2 32)))) (or (and .cse0 .cse1 .cse2) (and .cse3 .cse4 (= |ULTIMATE.start_main_~b~0#1| .cse5) .cse6 .cse7 .cse8 .cse9) (and (= |ULTIMATE.start_main_~b~0#1| .cse10) .cse0 .cse1 (bvuge |ULTIMATE.start_main_~r~0#1| .cse11) (bvuge |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~B~0#1|) .cse9) (and (exists ((|v_ULTIMATE.start_main_~b~0#1_87| (_ BitVec 32))) (let ((.cse12 (bvmul (_ bv2 32) |v_ULTIMATE.start_main_~b~0#1_87|))) (and (bvule |v_ULTIMATE.start_main_~b~0#1_87| (_ bv2 32)) (= |ULTIMATE.start_main_~A~0#1| (bvadd |ULTIMATE.start_main_~r~0#1| .cse12)) (= (bvudiv .cse12 (_ bv2 32)) |ULTIMATE.start_main_~b~0#1|)))) .cse2 .cse6 (bvule |ULTIMATE.start_main_~r~0#1| (_ bv2 32)) (= |ULTIMATE.start_main_~q~0#1| (_ bv2 32)) .cse9) (and .cse3 .cse0 .cse1 (not (bvuge |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~b~0#1|)) (= (bvmul (_ bv2 32) .cse5) |ULTIMATE.start_main_~b~0#1|) .cse9) (and .cse4 (bvult |ULTIMATE.start_main_~B~0#1| .cse10) .cse7 .cse8 .cse9 (bvuge |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~b~0#1|) (= .cse11 |ULTIMATE.start_main_~b~0#1|))))) [2022-11-20 20:23:03,730 INFO L895 garLoopResultBuilder]: At program point L42(line 42) the Hoare annotation is: (let ((.cse11 (bvmul |ULTIMATE.start_main_~B~0#1| (_ bv2 32)))) (let ((.cse2 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~B~0#1|)) (.cse6 (bvuge |ULTIMATE.start_main_~B~0#1| (_ bv1 32))) (.cse3 (bvule |ULTIMATE.start_main_~B~0#1| (_ bv2 32))) (.cse0 (= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~A~0#1|)) (.cse1 (= |ULTIMATE.start_main_~q~0#1| (_ bv0 32))) (.cse5 (bvudiv .cse11 (_ bv2 32))) (.cse4 (exists ((|v_ULTIMATE.start_main_~b~0#1_27| (_ BitVec 32))) (= (bvudiv (bvmul (_ bv2 32) |v_ULTIMATE.start_main_~b~0#1_27|) (_ bv2 32)) |ULTIMATE.start_main_~b~0#1|))) (.cse10 (bvmul (_ bv4 32) |ULTIMATE.start_main_~B~0#1|)) (.cse7 (= |ULTIMATE.start_main_~r~0#1| (bvadd (bvneg |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~A~0#1|))) (.cse8 (= |ULTIMATE.start_main_~q~0#1| (_ bv1 32))) (.cse9 (bvule |ULTIMATE.start_main_~A~0#1| (_ bv2 32)))) (or (and .cse0 .cse1 .cse2) (and .cse3 .cse4 (= |ULTIMATE.start_main_~b~0#1| .cse5) .cse6 .cse7 .cse8 .cse9) (and (= |ULTIMATE.start_main_~b~0#1| .cse10) .cse0 .cse1 (bvuge |ULTIMATE.start_main_~r~0#1| .cse11) (bvuge |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~B~0#1|) .cse9) (and (exists ((|v_ULTIMATE.start_main_~b~0#1_87| (_ BitVec 32))) (let ((.cse12 (bvmul (_ bv2 32) |v_ULTIMATE.start_main_~b~0#1_87|))) (and (bvule |v_ULTIMATE.start_main_~b~0#1_87| (_ bv2 32)) (= |ULTIMATE.start_main_~A~0#1| (bvadd |ULTIMATE.start_main_~r~0#1| .cse12)) (= (bvudiv .cse12 (_ bv2 32)) |ULTIMATE.start_main_~b~0#1|)))) .cse2 .cse6 (bvule |ULTIMATE.start_main_~r~0#1| (_ bv2 32)) (= |ULTIMATE.start_main_~q~0#1| (_ bv2 32)) .cse9) (and .cse3 .cse0 .cse1 (not (bvuge |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~b~0#1|)) (= (bvmul (_ bv2 32) .cse5) |ULTIMATE.start_main_~b~0#1|) .cse9) (and .cse4 (bvult |ULTIMATE.start_main_~B~0#1| .cse10) .cse7 .cse8 .cse9 (bvuge |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~b~0#1|) (= .cse11 |ULTIMATE.start_main_~b~0#1|))))) [2022-11-20 20:23:03,731 INFO L899 garLoopResultBuilder]: For program point L42-1(lines 41 50) no Hoare annotation was computed. [2022-11-20 20:23:03,731 INFO L899 garLoopResultBuilder]: For program point L38(line 38) no Hoare annotation was computed. [2022-11-20 20:23:03,731 INFO L895 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (and (bvule |ULTIMATE.start_main_~B~0#1| (_ bv2 32)) (bvule |ULTIMATE.start_main_~A~0#1| (_ bv2 32))) [2022-11-20 20:23:03,731 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-11-20 20:23:03,731 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-20 20:23:03,731 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-11-20 20:23:03,731 INFO L899 garLoopResultBuilder]: For program point L51(line 51) no Hoare annotation was computed. [2022-11-20 20:23:03,731 INFO L895 garLoopResultBuilder]: At program point L41-1(lines 41 50) the Hoare annotation is: (or (and (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~B~0#1|) (= (bvadd |ULTIMATE.start_main_~r~0#1| (bvmul |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~b~0#1|)) |ULTIMATE.start_main_~A~0#1|)) (and (= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~A~0#1|) (= |ULTIMATE.start_main_~q~0#1| (_ bv0 32)))) [2022-11-20 20:23:03,732 INFO L895 garLoopResultBuilder]: At program point L37-2(lines 37 40) the Hoare annotation is: (let ((.cse1 (= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~A~0#1|)) (.cse2 (= |ULTIMATE.start_main_~q~0#1| (_ bv0 32))) (.cse0 (bvule |ULTIMATE.start_main_~A~0#1| (_ bv2 32)))) (or (and (bvule |ULTIMATE.start_main_~b~0#1| (_ bv2 32)) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~B~0#1|) (forall ((|ULTIMATE.start_main_~b~0#1| (_ BitVec 32))) (= (bvadd |ULTIMATE.start_main_~r~0#1| (bvmul |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~b~0#1|)) |ULTIMATE.start_main_~A~0#1|)) (bvuge |ULTIMATE.start_main_~b~0#1| (_ bv1 32)) .cse0) (and .cse1 .cse2 (bvuge |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~B~0#1|) (bvuge |ULTIMATE.start_main_~B~0#1| (_ bv1 32)) (exists ((|v_ULTIMATE.start_main_~b~0#1_80| (_ BitVec 32))) (and (bvuge |ULTIMATE.start_main_~r~0#1| |v_ULTIMATE.start_main_~b~0#1_80|) (= |ULTIMATE.start_main_~b~0#1| (bvmul (_ bv4 32) |v_ULTIMATE.start_main_~b~0#1_80|)) (bvuge |v_ULTIMATE.start_main_~b~0#1_80| (_ bv1 32)) (bvuge |ULTIMATE.start_main_~r~0#1| (bvmul (_ bv2 32) |v_ULTIMATE.start_main_~b~0#1_80|)))) .cse0) (and .cse1 .cse2 (bvult |ULTIMATE.start_main_~B~0#1| (_ bv2147483647 32)) .cse0 (exists ((|v_ULTIMATE.start_main_~b~0#1_80| (_ BitVec 32))) (and (bvuge |ULTIMATE.start_main_~r~0#1| |v_ULTIMATE.start_main_~b~0#1_80|) (bvuge |v_ULTIMATE.start_main_~b~0#1_80| (_ bv1 32)) (= |ULTIMATE.start_main_~b~0#1| (bvmul (_ bv2 32) |v_ULTIMATE.start_main_~b~0#1_80|)))) (= (bvmul |ULTIMATE.start_main_~B~0#1| (_ bv2 32)) |ULTIMATE.start_main_~b~0#1|)))) [2022-11-20 20:23:03,732 INFO L899 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2022-11-20 20:23:03,732 INFO L899 garLoopResultBuilder]: For program point L16-2(lines 15 17) no Hoare annotation was computed. [2022-11-20 20:23:03,732 INFO L902 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 15 17) the Hoare annotation is: true [2022-11-20 20:23:03,732 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 15 17) no Hoare annotation was computed. [2022-11-20 20:23:03,732 INFO L899 garLoopResultBuilder]: For program point L19-2(lines 18 24) no Hoare annotation was computed. [2022-11-20 20:23:03,732 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 18 24) the Hoare annotation is: true [2022-11-20 20:23:03,732 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 18 24) no Hoare annotation was computed. [2022-11-20 20:23:03,732 INFO L899 garLoopResultBuilder]: For program point L20(lines 20 21) no Hoare annotation was computed. [2022-11-20 20:23:03,732 INFO L899 garLoopResultBuilder]: For program point L19(lines 19 22) no Hoare annotation was computed. [2022-11-20 20:23:03,733 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2022-11-20 20:23:03,736 INFO L444 BasicCegarLoop]: Path program histogram: [3, 3, 1, 1, 1, 1, 1, 1] [2022-11-20 20:23:03,738 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 20:23:03,744 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~b~0#1,QUANTIFIED] [2022-11-20 20:23:03,744 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] [2022-11-20 20:23:03,745 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] [2022-11-20 20:23:03,745 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] [2022-11-20 20:23:03,745 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] [2022-11-20 20:23:03,745 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] [2022-11-20 20:23:03,745 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] [2022-11-20 20:23:03,746 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] [2022-11-20 20:23:03,757 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~b~0#1,QUANTIFIED] [2022-11-20 20:23:03,758 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] [2022-11-20 20:23:03,759 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] [2022-11-20 20:23:03,759 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] [2022-11-20 20:23:03,760 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] [2022-11-20 20:23:03,760 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] [2022-11-20 20:23:03,760 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] [2022-11-20 20:23:03,760 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] [2022-11-20 20:23:03,766 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_27,QUANTIFIED] [2022-11-20 20:23:03,771 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_87,QUANTIFIED] [2022-11-20 20:23:03,771 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_87,QUANTIFIED] [2022-11-20 20:23:03,772 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_87,QUANTIFIED] [2022-11-20 20:23:03,772 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_27,QUANTIFIED] [2022-11-20 20:23:03,777 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_27,QUANTIFIED] [2022-11-20 20:23:03,777 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_87,QUANTIFIED] [2022-11-20 20:23:03,777 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_87,QUANTIFIED] [2022-11-20 20:23:03,777 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_87,QUANTIFIED] [2022-11-20 20:23:03,778 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_27,QUANTIFIED] [2022-11-20 20:23:03,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 08:23:03 BoogieIcfgContainer [2022-11-20 20:23:03,782 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 20:23:03,782 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 20:23:03,782 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 20:23:03,783 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 20:23:03,783 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:20:50" (3/4) ... [2022-11-20 20:23:03,786 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-20 20:23:03,796 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2022-11-20 20:23:03,796 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-20 20:23:03,801 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2022-11-20 20:23:03,801 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-20 20:23:03,801 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-20 20:23:03,802 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-20 20:23:03,830 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((~bvule32(b, 2bv32) && b == B) && (forall ULTIMATE.start_main_~b~0#1 : bv32 :: ~bvadd64(r, ~bvmul32(q, ULTIMATE.start_main_~b~0#1)) == A)) && ~bvuge32(b, 1bv32)) && ~bvule32(A, 2bv32)) || (((((r == A && q == 0bv32) && ~bvuge32(r, B)) && ~bvuge32(B, 1bv32)) && (\exists v_ULTIMATE.start_main_~b~0#1_80 : bv32 :: ((~bvuge32(r, v_ULTIMATE.start_main_~b~0#1_80) && b == ~bvmul32(4bv32, v_ULTIMATE.start_main_~b~0#1_80)) && ~bvuge32(v_ULTIMATE.start_main_~b~0#1_80, 1bv32)) && ~bvuge32(r, ~bvmul32(2bv32, v_ULTIMATE.start_main_~b~0#1_80)))) && ~bvule32(A, 2bv32))) || (((((r == A && q == 0bv32) && ~bvult32(B, 2147483647bv32)) && ~bvule32(A, 2bv32)) && (\exists v_ULTIMATE.start_main_~b~0#1_80 : bv32 :: (~bvuge32(r, v_ULTIMATE.start_main_~b~0#1_80) && ~bvuge32(v_ULTIMATE.start_main_~b~0#1_80, 1bv32)) && b == ~bvmul32(2bv32, v_ULTIMATE.start_main_~b~0#1_80))) && ~bvmul32(B, 2bv32) == b) [2022-11-20 20:23:03,830 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((r == A && q == 0bv32) && b == B) || ((((((~bvule32(B, 2bv32) && (\exists v_ULTIMATE.start_main_~b~0#1_27 : bv32 :: ~bvudiv32(~bvmul32(2bv32, v_ULTIMATE.start_main_~b~0#1_27), 2bv32) == b)) && b == ~bvudiv32(~bvmul32(B, 2bv32), 2bv32)) && ~bvuge32(B, 1bv32)) && r == ~bvadd64(~bvneg64(b), A)) && q == 1bv32) && ~bvule32(A, 2bv32))) || (((((b == ~bvmul32(4bv32, B) && r == A) && q == 0bv32) && ~bvuge32(r, ~bvmul32(B, 2bv32))) && ~bvuge32(r, B)) && ~bvule32(A, 2bv32))) || ((((((\exists v_ULTIMATE.start_main_~b~0#1_87 : bv32 :: (~bvule32(v_ULTIMATE.start_main_~b~0#1_87, 2bv32) && A == ~bvadd64(r, ~bvmul32(2bv32, v_ULTIMATE.start_main_~b~0#1_87))) && ~bvudiv32(~bvmul32(2bv32, v_ULTIMATE.start_main_~b~0#1_87), 2bv32) == b) && b == B) && ~bvuge32(B, 1bv32)) && ~bvule32(r, 2bv32)) && q == 2bv32) && ~bvule32(A, 2bv32))) || (((((~bvule32(B, 2bv32) && r == A) && q == 0bv32) && !~bvuge32(r, b)) && ~bvmul32(2bv32, ~bvudiv32(~bvmul32(B, 2bv32), 2bv32)) == b) && ~bvule32(A, 2bv32))) || (((((((\exists v_ULTIMATE.start_main_~b~0#1_27 : bv32 :: ~bvudiv32(~bvmul32(2bv32, v_ULTIMATE.start_main_~b~0#1_27), 2bv32) == b) && ~bvult32(B, ~bvmul32(4bv32, B))) && r == ~bvadd64(~bvneg64(b), A)) && q == 1bv32) && ~bvule32(A, 2bv32)) && ~bvuge32(A, b)) && ~bvmul32(B, 2bv32) == b) [2022-11-20 20:23:03,846 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/witness.graphml [2022-11-20 20:23:03,847 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 20:23:03,847 INFO L158 Benchmark]: Toolchain (without parser) took 134533.78ms. Allocated memory was 73.4MB in the beginning and 92.3MB in the end (delta: 18.9MB). Free memory was 49.9MB in the beginning and 31.7MB in the end (delta: 18.2MB). Peak memory consumption was 37.5MB. Max. memory is 16.1GB. [2022-11-20 20:23:03,848 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 73.4MB. Free memory is still 51.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 20:23:03,848 INFO L158 Benchmark]: CACSL2BoogieTranslator took 241.86ms. Allocated memory is still 73.4MB. Free memory was 49.9MB in the beginning and 39.1MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 20:23:03,848 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.61ms. Allocated memory is still 73.4MB. Free memory was 39.1MB in the beginning and 37.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 20:23:03,849 INFO L158 Benchmark]: Boogie Preprocessor took 25.15ms. Allocated memory is still 73.4MB. Free memory was 37.5MB in the beginning and 36.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 20:23:03,850 INFO L158 Benchmark]: RCFGBuilder took 459.65ms. Allocated memory was 73.4MB in the beginning and 92.3MB in the end (delta: 18.9MB). Free memory was 36.1MB in the beginning and 67.2MB in the end (delta: -31.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-20 20:23:03,850 INFO L158 Benchmark]: TraceAbstraction took 133695.94ms. Allocated memory is still 92.3MB. Free memory was 66.8MB in the beginning and 34.9MB in the end (delta: 31.8MB). Peak memory consumption was 46.5MB. Max. memory is 16.1GB. [2022-11-20 20:23:03,851 INFO L158 Benchmark]: Witness Printer took 64.51ms. Allocated memory is still 92.3MB. Free memory was 34.9MB in the beginning and 31.7MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-20 20:23:03,856 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 73.4MB. Free memory is still 51.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 241.86ms. Allocated memory is still 73.4MB. Free memory was 49.9MB in the beginning and 39.1MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.61ms. Allocated memory is still 73.4MB. Free memory was 39.1MB in the beginning and 37.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.15ms. Allocated memory is still 73.4MB. Free memory was 37.5MB in the beginning and 36.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 459.65ms. Allocated memory was 73.4MB in the beginning and 92.3MB in the end (delta: 18.9MB). Free memory was 36.1MB in the beginning and 67.2MB in the end (delta: -31.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 133695.94ms. Allocated memory is still 92.3MB. Free memory was 66.8MB in the beginning and 34.9MB in the end (delta: 31.8MB). Peak memory consumption was 46.5MB. Max. memory is 16.1GB. * Witness Printer took 64.51ms. Allocated memory is still 92.3MB. Free memory was 34.9MB in the beginning and 31.7MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~b~0#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~b~0#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_27,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_87,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_87,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_87,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_27,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_27,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_87,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_87,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_87,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_27,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 133.6s, OverallIterations: 12, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 29.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 4.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 310 SdHoareTripleChecker+Valid, 13.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 302 mSDsluCounter, 1509 SdHoareTripleChecker+Invalid, 12.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 201 IncrementalHoareTripleChecker+Unchecked, 1198 mSDsCounter, 149 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1300 IncrementalHoareTripleChecker+Invalid, 1650 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 149 mSolverCounterUnsat, 311 mSDtfsCounter, 1300 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2072 GetRequests, 1800 SyntacticMatches, 20 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2616 ImplicationChecksByTransitivity, 83.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=10, InterpolantAutomatonStates: 137, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 47 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 44 PreInvPairs, 72 NumberOfFragments, 453 HoareAnnotationTreeSize, 44 FomulaSimplifications, 85 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 11 FomulaSimplificationsInter, 2577 FormulaSimplificationTreeSizeReductionInter, 4.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 92.0s InterpolantComputationTime, 1152 NumberOfCodeBlocks, 1134 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 1943 ConstructedInterpolants, 132 QuantifiedInterpolants, 10416 SizeOfPredicates, 110 NumberOfNonLiveVariables, 1945 ConjunctsInSsa, 363 ConjunctsInUnsatCore, 43 InterpolantComputations, 6 PerfectInterpolantSequences, 1354/1720 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 37]: Loop Invariant [2022-11-20 20:23:03,880 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~b~0#1,QUANTIFIED] [2022-11-20 20:23:03,880 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] [2022-11-20 20:23:03,880 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] [2022-11-20 20:23:03,880 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] [2022-11-20 20:23:03,881 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] [2022-11-20 20:23:03,881 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] [2022-11-20 20:23:03,881 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] [2022-11-20 20:23:03,881 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] [2022-11-20 20:23:03,889 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~b~0#1,QUANTIFIED] [2022-11-20 20:23:03,889 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] [2022-11-20 20:23:03,889 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] [2022-11-20 20:23:03,890 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] [2022-11-20 20:23:03,890 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] [2022-11-20 20:23:03,890 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] [2022-11-20 20:23:03,890 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] [2022-11-20 20:23:03,890 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_80,QUANTIFIED] Derived loop invariant: (((((~bvule32(b, 2bv32) && b == B) && (forall ULTIMATE.start_main_~b~0#1 : bv32 :: ~bvadd64(r, ~bvmul32(q, ULTIMATE.start_main_~b~0#1)) == A)) && ~bvuge32(b, 1bv32)) && ~bvule32(A, 2bv32)) || (((((r == A && q == 0bv32) && ~bvuge32(r, B)) && ~bvuge32(B, 1bv32)) && (\exists v_ULTIMATE.start_main_~b~0#1_80 : bv32 :: ((~bvuge32(r, v_ULTIMATE.start_main_~b~0#1_80) && b == ~bvmul32(4bv32, v_ULTIMATE.start_main_~b~0#1_80)) && ~bvuge32(v_ULTIMATE.start_main_~b~0#1_80, 1bv32)) && ~bvuge32(r, ~bvmul32(2bv32, v_ULTIMATE.start_main_~b~0#1_80)))) && ~bvule32(A, 2bv32))) || (((((r == A && q == 0bv32) && ~bvult32(B, 2147483647bv32)) && ~bvule32(A, 2bv32)) && (\exists v_ULTIMATE.start_main_~b~0#1_80 : bv32 :: (~bvuge32(r, v_ULTIMATE.start_main_~b~0#1_80) && ~bvuge32(v_ULTIMATE.start_main_~b~0#1_80, 1bv32)) && b == ~bvmul32(2bv32, v_ULTIMATE.start_main_~b~0#1_80))) && ~bvmul32(B, 2bv32) == b) - InvariantResult [Line: 25]: Loop Invariant [2022-11-20 20:23:03,891 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_27,QUANTIFIED] [2022-11-20 20:23:03,891 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_87,QUANTIFIED] [2022-11-20 20:23:03,892 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_87,QUANTIFIED] [2022-11-20 20:23:03,892 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_87,QUANTIFIED] [2022-11-20 20:23:03,892 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_27,QUANTIFIED] [2022-11-20 20:23:03,893 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_27,QUANTIFIED] [2022-11-20 20:23:03,893 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_87,QUANTIFIED] [2022-11-20 20:23:03,893 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_87,QUANTIFIED] [2022-11-20 20:23:03,893 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_87,QUANTIFIED] [2022-11-20 20:23:03,894 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~b~0#1_27,QUANTIFIED] Derived loop invariant: ((((((r == A && q == 0bv32) && b == B) || ((((((~bvule32(B, 2bv32) && (\exists v_ULTIMATE.start_main_~b~0#1_27 : bv32 :: ~bvudiv32(~bvmul32(2bv32, v_ULTIMATE.start_main_~b~0#1_27), 2bv32) == b)) && b == ~bvudiv32(~bvmul32(B, 2bv32), 2bv32)) && ~bvuge32(B, 1bv32)) && r == ~bvadd64(~bvneg64(b), A)) && q == 1bv32) && ~bvule32(A, 2bv32))) || (((((b == ~bvmul32(4bv32, B) && r == A) && q == 0bv32) && ~bvuge32(r, ~bvmul32(B, 2bv32))) && ~bvuge32(r, B)) && ~bvule32(A, 2bv32))) || ((((((\exists v_ULTIMATE.start_main_~b~0#1_87 : bv32 :: (~bvule32(v_ULTIMATE.start_main_~b~0#1_87, 2bv32) && A == ~bvadd64(r, ~bvmul32(2bv32, v_ULTIMATE.start_main_~b~0#1_87))) && ~bvudiv32(~bvmul32(2bv32, v_ULTIMATE.start_main_~b~0#1_87), 2bv32) == b) && b == B) && ~bvuge32(B, 1bv32)) && ~bvule32(r, 2bv32)) && q == 2bv32) && ~bvule32(A, 2bv32))) || (((((~bvule32(B, 2bv32) && r == A) && q == 0bv32) && !~bvuge32(r, b)) && ~bvmul32(2bv32, ~bvudiv32(~bvmul32(B, 2bv32), 2bv32)) == b) && ~bvule32(A, 2bv32))) || (((((((\exists v_ULTIMATE.start_main_~b~0#1_27 : bv32 :: ~bvudiv32(~bvmul32(2bv32, v_ULTIMATE.start_main_~b~0#1_27), 2bv32) == b) && ~bvult32(B, ~bvmul32(4bv32, B))) && r == ~bvadd64(~bvneg64(b), A)) && q == 1bv32) && ~bvule32(A, 2bv32)) && ~bvuge32(A, b)) && ~bvmul32(B, 2bv32) == b) - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-11-20 20:23:03,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a272afc-6228-4297-8889-35911e36a811/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE