./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V --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 f2c97cfaf178ecbb63eaaf825cd5ea4b5be1bf37ecd5b20cf7e400328e1cd168 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:09:43,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:09:43,068 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:09:43,113 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:09:43,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:09:43,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:09:43,129 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:09:43,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:09:43,140 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:09:43,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:09:43,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:09:43,148 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:09:43,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:09:43,159 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:09:43,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:09:43,166 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:09:43,169 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:09:43,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:09:43,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:09:43,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:09:43,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:09:43,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:09:43,198 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:09:43,200 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:09:43,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:09:43,208 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:09:43,209 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:09:43,211 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:09:43,212 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:09:43,214 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:09:43,215 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:09:43,217 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:09:43,219 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:09:43,221 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:09:43,223 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:09:43,224 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:09:43,225 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:09:43,225 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:09:43,226 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:09:43,227 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:09:43,228 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:09:43,229 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:09:43,286 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:09:43,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:09:43,287 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:09:43,288 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:09:43,289 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:09:43,289 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:09:43,289 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:09:43,290 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:09:43,290 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:09:43,290 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:09:43,292 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:09:43,292 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:09:43,292 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:09:43,293 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:09:43,293 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:09:43,293 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:09:43,294 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:09:43,294 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:09:43,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:09:43,295 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:09:43,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:09:43,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:09:43,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:09:43,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:09:43,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:09:43,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:09:43,299 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:09:43,299 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:09:43,300 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:09:43,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:09:43,300 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:09:43,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:09:43,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:09:43,302 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:09:43,302 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:09:43,302 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:09:43,303 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:09:43,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:09:43,303 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:09:43,303 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:09:43,304 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:09:43,304 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f2c97cfaf178ecbb63eaaf825cd5ea4b5be1bf37ecd5b20cf7e400328e1cd168 [2021-11-23 03:09:43,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:09:43,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:09:43,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:09:43,710 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:09:43,711 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:09:43,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i [2021-11-23 03:09:43,814 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/data/059e35b36/93fee86159794f9dbb86f2c1b256040a/FLAG75ba458dd [2021-11-23 03:09:44,469 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:09:44,469 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i [2021-11-23 03:09:44,485 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/data/059e35b36/93fee86159794f9dbb86f2c1b256040a/FLAG75ba458dd [2021-11-23 03:09:44,806 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/data/059e35b36/93fee86159794f9dbb86f2c1b256040a [2021-11-23 03:09:44,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:09:44,814 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:09:44,817 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:09:44,818 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:09:44,822 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:09:44,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:09:44" (1/1) ... [2021-11-23 03:09:44,825 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a36c5d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:44, skipping insertion in model container [2021-11-23 03:09:44,826 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:09:44" (1/1) ... [2021-11-23 03:09:44,834 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:09:44,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:09:45,067 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i[951,964] [2021-11-23 03:09:45,093 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:09:45,109 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:09:45,131 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound2.i[951,964] [2021-11-23 03:09:45,155 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:09:45,170 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:09:45,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:45 WrapperNode [2021-11-23 03:09:45,171 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:09:45,172 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:09:45,172 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:09:45,172 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:09:45,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:45" (1/1) ... [2021-11-23 03:09:45,190 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:45" (1/1) ... [2021-11-23 03:09:45,212 INFO L137 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2021-11-23 03:09:45,213 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:09:45,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:09:45,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:09:45,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:09:45,225 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:45" (1/1) ... [2021-11-23 03:09:45,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:45" (1/1) ... [2021-11-23 03:09:45,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:45" (1/1) ... [2021-11-23 03:09:45,228 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:45" (1/1) ... [2021-11-23 03:09:45,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:45" (1/1) ... [2021-11-23 03:09:45,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:45" (1/1) ... [2021-11-23 03:09:45,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:45" (1/1) ... [2021-11-23 03:09:45,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:09:45,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:09:45,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:09:45,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:09:45,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:45" (1/1) ... [2021-11-23 03:09:45,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:09:45,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:09:45,279 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:09:45,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:09:45,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:09:45,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:09:45,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:09:45,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:09:45,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 03:09:45,337 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 03:09:45,411 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:09:45,413 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:09:45,558 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:09:45,588 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:09:45,588 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 03:09:45,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:09:45 BoogieIcfgContainer [2021-11-23 03:09:45,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:09:45,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:09:45,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:09:45,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:09:45,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:09:44" (1/3) ... [2021-11-23 03:09:45,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2528ecc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:09:45, skipping insertion in model container [2021-11-23 03:09:45,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:09:45" (2/3) ... [2021-11-23 03:09:45,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2528ecc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:09:45, skipping insertion in model container [2021-11-23 03:09:45,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:09:45" (3/3) ... [2021-11-23 03:09:45,615 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound2.i [2021-11-23 03:09:45,622 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:09:45,622 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:09:45,676 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:09:45,685 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:09:45,686 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:09:45,707 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:09:45,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 03:09:45,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:09:45,712 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:09:45,713 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:09:45,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:09:45,719 INFO L85 PathProgramCache]: Analyzing trace with hash 774102990, now seen corresponding path program 1 times [2021-11-23 03:09:45,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:09:45,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951726861] [2021-11-23 03:09:45,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:09:45,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:09:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:09:45,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:09:45,896 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:09:45,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951726861] [2021-11-23 03:09:45,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951726861] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:09:45,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:09:45,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:09:45,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026208181] [2021-11-23 03:09:45,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:09:45,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 03:09:45,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:09:45,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 03:09:45,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 03:09:45,945 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:09:46,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:09:46,013 INFO L93 Difference]: Finished difference Result 30 states and 43 transitions. [2021-11-23 03:09:46,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 03:09:46,016 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 03:09:46,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:09:46,026 INFO L225 Difference]: With dead ends: 30 [2021-11-23 03:09:46,042 INFO L226 Difference]: Without dead ends: 15 [2021-11-23 03:09:46,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 03:09:46,051 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:09:46,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:09:46,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-23 03:09:46,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-23 03:09:46,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:09:46,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2021-11-23 03:09:46,121 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 7 [2021-11-23 03:09:46,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:09:46,122 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2021-11-23 03:09:46,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:09:46,123 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2021-11-23 03:09:46,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 03:09:46,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:09:46,124 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:09:46,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:09:46,125 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:09:46,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:09:46,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1084410172, now seen corresponding path program 1 times [2021-11-23 03:09:46,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:09:46,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986860082] [2021-11-23 03:09:46,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:09:46,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:09:46,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:09:46,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:09:46,262 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:09:46,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986860082] [2021-11-23 03:09:46,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986860082] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:09:46,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:09:46,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:09:46,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361098234] [2021-11-23 03:09:46,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:09:46,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:09:46,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:09:46,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:09:46,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:09:46,269 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:09:46,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:09:46,305 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2021-11-23 03:09:46,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:09:46,307 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 03:09:46,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:09:46,308 INFO L225 Difference]: With dead ends: 28 [2021-11-23 03:09:46,308 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 03:09:46,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:09:46,312 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:09:46,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:09:46,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 03:09:46,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 03:09:46,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:09:46,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-11-23 03:09:46,331 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2021-11-23 03:09:46,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:09:46,331 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-11-23 03:09:46,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:09:46,334 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-11-23 03:09:46,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 03:09:46,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:09:46,336 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:09:46,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:09:46,337 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:09:46,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:09:46,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1068718015, now seen corresponding path program 1 times [2021-11-23 03:09:46,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:09:46,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305442003] [2021-11-23 03:09:46,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:09:46,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:09:46,385 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:09:46,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1422486759] [2021-11-23 03:09:46,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:09:46,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:09:46,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:09:46,407 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:09:46,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:09:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:09:46,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:09:46,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:09:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:09:46,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:09:46,630 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:09:46,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305442003] [2021-11-23 03:09:46,632 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:09:46,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422486759] [2021-11-23 03:09:46,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422486759] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:09:46,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:09:46,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:09:46,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438575713] [2021-11-23 03:09:46,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:09:46,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:09:46,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:09:46,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:09:46,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:09:46,645 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:09:46,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:09:46,707 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-11-23 03:09:46,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:09:46,708 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 03:09:46,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:09:46,710 INFO L225 Difference]: With dead ends: 28 [2021-11-23 03:09:46,710 INFO L226 Difference]: Without dead ends: 21 [2021-11-23 03:09:46,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:09:46,716 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:09:46,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 55 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:09:46,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-23 03:09:46,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-11-23 03:09:46,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:09:46,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-11-23 03:09:46,733 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 10 [2021-11-23 03:09:46,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:09:46,734 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-11-23 03:09:46,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:09:46,734 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-11-23 03:09:46,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 03:09:46,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:09:46,736 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:09:46,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:09:46,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:09:46,951 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:09:46,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:09:46,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1066930555, now seen corresponding path program 1 times [2021-11-23 03:09:46,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:09:46,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256404784] [2021-11-23 03:09:46,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:09:46,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:09:46,987 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:09:46,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772322009] [2021-11-23 03:09:46,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:09:46,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:09:46,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:09:46,996 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:09:47,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:09:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:09:47,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 03:09:47,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:09:47,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:09:47,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:09:47,377 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:09:47,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256404784] [2021-11-23 03:09:47,377 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:09:47,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772322009] [2021-11-23 03:09:47,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772322009] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:09:47,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:09:47,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:09:47,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832085841] [2021-11-23 03:09:47,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:09:47,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:09:47,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:09:47,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:09:47,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:09:47,391 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:09:49,488 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 03:09:49,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:09:49,589 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2021-11-23 03:09:49,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:09:49,591 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 03:09:49,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:09:49,593 INFO L225 Difference]: With dead ends: 29 [2021-11-23 03:09:49,593 INFO L226 Difference]: Without dead ends: 26 [2021-11-23 03:09:49,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:09:49,595 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:09:49,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 51 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-23 03:09:49,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-23 03:09:49,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-23 03:09:49,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:09:49,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-11-23 03:09:49,604 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 10 [2021-11-23 03:09:49,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:09:49,605 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-11-23 03:09:49,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:09:49,605 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-11-23 03:09:49,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 03:09:49,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:09:49,607 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:09:49,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:09:49,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:09:49,823 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:09:49,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:09:49,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1531048614, now seen corresponding path program 1 times [2021-11-23 03:09:49,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:09:49,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819305571] [2021-11-23 03:09:49,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:09:49,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:09:49,840 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:09:49,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405391927] [2021-11-23 03:09:49,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:09:49,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:09:49,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:09:49,843 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:09:49,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:09:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:09:49,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:09:49,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:09:49,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:09:49,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:09:50,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:09:50,010 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:09:50,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819305571] [2021-11-23 03:09:50,010 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:09:50,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405391927] [2021-11-23 03:09:50,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405391927] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:09:50,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1997966025] [2021-11-23 03:09:50,049 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 03:09:50,050 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:09:50,055 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:09:50,062 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:09:50,063 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:09:50,518 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2021-11-23 03:09:50,558 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:09:51,463 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '411#(and (<= ~counter~0 4) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 3 ~counter~0) (= |#NULL.base| 0))' at error location [2021-11-23 03:09:51,463 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:09:51,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:09:51,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-11-23 03:09:51,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748637966] [2021-11-23 03:09:51,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:09:51,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:09:51,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:09:51,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:09:51,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:09:51,466 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:09:51,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:09:51,516 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-11-23 03:09:51,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:09:51,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 03:09:51,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:09:51,518 INFO L225 Difference]: With dead ends: 39 [2021-11-23 03:09:51,518 INFO L226 Difference]: Without dead ends: 28 [2021-11-23 03:09:51,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:09:51,520 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:09:51,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 43 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:09:51,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-23 03:09:51,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-23 03:09:51,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:09:51,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-11-23 03:09:51,527 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 12 [2021-11-23 03:09:51,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:09:51,528 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-11-23 03:09:51,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:09:51,528 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-11-23 03:09:51,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 03:09:51,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:09:51,530 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:09:51,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-23 03:09:51,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:09:51,755 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:09:51,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:09:51,755 INFO L85 PathProgramCache]: Analyzing trace with hash -107828201, now seen corresponding path program 1 times [2021-11-23 03:09:51,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:09:51,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480222138] [2021-11-23 03:09:51,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:09:51,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:09:51,782 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:09:51,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671914687] [2021-11-23 03:09:51,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:09:51,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:09:51,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:09:51,785 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:09:51,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:09:51,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:09:51,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 03:09:51,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:09:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:09:52,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:09:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:09:55,132 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:09:55,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480222138] [2021-11-23 03:09:55,133 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:09:55,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671914687] [2021-11-23 03:09:55,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671914687] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 03:09:55,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:09:55,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-23 03:09:55,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543706042] [2021-11-23 03:09:55,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:09:55,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:09:55,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:09:55,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:09:55,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:09:55,137 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:10:01,469 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 03:10:01,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:10:01,629 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2021-11-23 03:10:01,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:10:01,630 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 03:10:01,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:10:01,633 INFO L225 Difference]: With dead ends: 43 [2021-11-23 03:10:01,633 INFO L226 Difference]: Without dead ends: 40 [2021-11-23 03:10:01,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=39, Invalid=92, Unknown=1, NotChecked=0, Total=132 [2021-11-23 03:10:01,634 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 17 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:10:01,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 104 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 1 Unknown, 16 Unchecked, 2.2s Time] [2021-11-23 03:10:01,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-23 03:10:01,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2021-11-23 03:10:01,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:10:01,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-11-23 03:10:01,644 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 13 [2021-11-23 03:10:01,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:10:01,644 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-11-23 03:10:01,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:10:01,645 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-11-23 03:10:01,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 03:10:01,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:10:01,646 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:10:01,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:10:01,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 03:10:01,863 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:10:01,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:10:01,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1528191228, now seen corresponding path program 2 times [2021-11-23 03:10:01,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:10:01,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481759478] [2021-11-23 03:10:01,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:10:01,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:10:01,877 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:10:01,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296403924] [2021-11-23 03:10:01,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:10:01,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:10:01,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:10:01,885 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:10:01,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:10:01,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-23 03:10:01,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:10:01,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:10:01,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:10:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 03:10:02,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:10:02,048 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:10:02,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481759478] [2021-11-23 03:10:02,049 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:10:02,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296403924] [2021-11-23 03:10:02,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296403924] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:10:02,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:10:02,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:10:02,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672979304] [2021-11-23 03:10:02,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:10:02,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:10:02,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:10:02,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:10:02,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:10:02,052 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:10:02,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:10:02,124 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-11-23 03:10:02,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:10:02,126 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 03:10:02,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:10:02,127 INFO L225 Difference]: With dead ends: 39 [2021-11-23 03:10:02,127 INFO L226 Difference]: Without dead ends: 36 [2021-11-23 03:10:02,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:10:02,128 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:10:02,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 47 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:10:02,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-23 03:10:02,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2021-11-23 03:10:02,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:10:02,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-11-23 03:10:02,135 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 15 [2021-11-23 03:10:02,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:10:02,135 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-11-23 03:10:02,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:10:02,136 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-11-23 03:10:02,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 03:10:02,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:10:02,137 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:10:02,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:10:02,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:10:02,363 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:10:02,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:10:02,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1343356900, now seen corresponding path program 1 times [2021-11-23 03:10:02,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:10:02,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37555863] [2021-11-23 03:10:02,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:10:02,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:10:02,373 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:10:02,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044277963] [2021-11-23 03:10:02,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:10:02,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:10:02,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:10:02,375 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:10:02,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:10:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:10:02,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:10:02,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:10:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:10:02,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:10:02,507 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:10:02,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37555863] [2021-11-23 03:10:02,508 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:10:02,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044277963] [2021-11-23 03:10:02,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044277963] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:10:02,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:10:02,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:10:02,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683668761] [2021-11-23 03:10:02,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:10:02,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:10:02,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:10:02,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:10:02,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:10:02,511 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:10:02,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:10:02,540 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-11-23 03:10:02,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:10:02,541 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), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-23 03:10:02,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:10:02,542 INFO L225 Difference]: With dead ends: 43 [2021-11-23 03:10:02,543 INFO L226 Difference]: Without dead ends: 28 [2021-11-23 03:10:02,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:10:02,544 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:10:02,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:10:02,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-23 03:10:02,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-23 03:10:02,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:10:02,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-23 03:10:02,551 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 18 [2021-11-23 03:10:02,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:10:02,552 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-23 03:10:02,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:10:02,552 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-11-23 03:10:02,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 03:10:02,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:10:02,553 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:10:02,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:10:02,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:10:02,777 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:10:02,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:10:02,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1579561542, now seen corresponding path program 1 times [2021-11-23 03:10:02,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:10:02,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447711269] [2021-11-23 03:10:02,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:10:02,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:10:02,786 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:10:02,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [981989830] [2021-11-23 03:10:02,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:10:02,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:10:02,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:10:02,791 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:10:02,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:10:02,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:10:02,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:10:02,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:10:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:10:02,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:10:02,916 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:10:02,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447711269] [2021-11-23 03:10:02,917 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:10:02,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981989830] [2021-11-23 03:10:02,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981989830] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:10:02,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:10:02,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:10:02,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173118416] [2021-11-23 03:10:02,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:10:02,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:10:02,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:10:02,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:10:02,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:10:02,920 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:10:02,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:10:02,949 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-11-23 03:10:02,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:10:02,950 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-11-23 03:10:02,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:10:02,950 INFO L225 Difference]: With dead ends: 28 [2021-11-23 03:10:02,950 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 03:10:02,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:10:02,951 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:10:02,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 14 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:10:02,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 03:10:02,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 03:10:02,953 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) [2021-11-23 03:10:02,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 03:10:02,953 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2021-11-23 03:10:02,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:10:02,953 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 03:10:02,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:10:02,953 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 03:10:02,954 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 03:10:02,956 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 03:10:02,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:10:03,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:10:03,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-23 03:10:03,494 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-23 03:10:03,494 INFO L861 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: true [2021-11-23 03:10:03,494 INFO L858 garLoopResultBuilder]: For program point L38(lines 38 47) no Hoare annotation was computed. [2021-11-23 03:10:03,495 INFO L854 garLoopResultBuilder]: At program point L38-2(lines 38 47) the Hoare annotation is: (= (mod (+ (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~r~0#1|) 4294967296) (mod |ULTIMATE.start_main_~A~0#1| 4294967296)) [2021-11-23 03:10:03,495 INFO L858 garLoopResultBuilder]: For program point L34-1(lines 34 37) no Hoare annotation was computed. [2021-11-23 03:10:03,495 INFO L854 garLoopResultBuilder]: At program point L34-3(lines 34 37) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse1 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|))) (or (and (<= 1 ~counter~0) .cse0 .cse1) (and .cse0 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~b~0#1|) (= ~counter~0 0) .cse1 (= |ULTIMATE.start_main_~B~0#1| 1)))) [2021-11-23 03:10:03,495 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-23 03:10:03,495 INFO L858 garLoopResultBuilder]: For program point L43-2(lines 26 50) no Hoare annotation was computed. [2021-11-23 03:10:03,495 INFO L854 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (and (= |ULTIMATE.start_main_~q~0#1| 0) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2021-11-23 03:10:03,495 INFO L858 garLoopResultBuilder]: For program point L39-1(lines 38 47) no Hoare annotation was computed. [2021-11-23 03:10:03,496 INFO L858 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2021-11-23 03:10:03,496 INFO L858 garLoopResultBuilder]: For program point L19-2(lines 18 24) no Hoare annotation was computed. [2021-11-23 03:10:03,496 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 18 24) the Hoare annotation is: true [2021-11-23 03:10:03,496 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 18 24) no Hoare annotation was computed. [2021-11-23 03:10:03,496 INFO L858 garLoopResultBuilder]: For program point L20(lines 20 21) no Hoare annotation was computed. [2021-11-23 03:10:03,496 INFO L858 garLoopResultBuilder]: For program point L19(lines 19 22) no Hoare annotation was computed. [2021-11-23 03:10:03,496 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2021-11-23 03:10:03,499 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:10:03,501 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 03:10:03,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:10:03 BoogieIcfgContainer [2021-11-23 03:10:03,524 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 03:10:03,525 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 03:10:03,525 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 03:10:03,525 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 03:10:03,526 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:09:45" (3/4) ... [2021-11-23 03:10:03,529 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-23 03:10:03,534 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-23 03:10:03,538 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-11-23 03:10:03,538 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-23 03:10:03,538 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-23 03:10:03,539 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-23 03:10:03,573 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 03:10:03,574 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 03:10:03,574 INFO L158 Benchmark]: Toolchain (without parser) took 18760.68ms. Allocated memory was 94.4MB in the beginning and 127.9MB in the end (delta: 33.6MB). Free memory was 59.4MB in the beginning and 55.6MB in the end (delta: 3.9MB). Peak memory consumption was 37.8MB. Max. memory is 16.1GB. [2021-11-23 03:10:03,575 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 94.4MB. Free memory was 65.5MB in the beginning and 65.5MB in the end (delta: 27.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:10:03,575 INFO L158 Benchmark]: CACSL2BoogieTranslator took 353.68ms. Allocated memory is still 94.4MB. Free memory was 59.3MB in the beginning and 70.2MB in the end (delta: -11.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 03:10:03,576 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.44ms. Allocated memory is still 94.4MB. Free memory was 70.2MB in the beginning and 68.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:10:03,576 INFO L158 Benchmark]: Boogie Preprocessor took 26.55ms. Allocated memory is still 94.4MB. Free memory was 68.5MB in the beginning and 67.9MB in the end (delta: 670.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:10:03,577 INFO L158 Benchmark]: RCFGBuilder took 363.14ms. Allocated memory is still 94.4MB. Free memory was 67.5MB in the beginning and 57.7MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 03:10:03,577 INFO L158 Benchmark]: TraceAbstraction took 17918.01ms. Allocated memory was 94.4MB in the beginning and 127.9MB in the end (delta: 33.6MB). Free memory was 57.0MB in the beginning and 57.7MB in the end (delta: -652.3kB). Peak memory consumption was 34.3MB. Max. memory is 16.1GB. [2021-11-23 03:10:03,578 INFO L158 Benchmark]: Witness Printer took 48.63ms. Allocated memory is still 127.9MB. Free memory was 57.7MB in the beginning and 55.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:10:03,580 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 94.4MB. Free memory was 65.5MB in the beginning and 65.5MB in the end (delta: 27.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 353.68ms. Allocated memory is still 94.4MB. Free memory was 59.3MB in the beginning and 70.2MB in the end (delta: -11.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.44ms. Allocated memory is still 94.4MB. Free memory was 70.2MB in the beginning and 68.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.55ms. Allocated memory is still 94.4MB. Free memory was 68.5MB in the beginning and 67.9MB in the end (delta: 670.8kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 363.14ms. Allocated memory is still 94.4MB. Free memory was 67.5MB in the beginning and 57.7MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 17918.01ms. Allocated memory was 94.4MB in the beginning and 127.9MB in the end (delta: 33.6MB). Free memory was 57.0MB in the beginning and 57.7MB in the end (delta: -652.3kB). Peak memory consumption was 34.3MB. Max. memory is 16.1GB. * Witness Printer took 48.63ms. Allocated memory is still 127.9MB. Free memory was 57.7MB in the beginning and 55.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. 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 - 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 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 17.8s, OverallIterations: 9, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 9.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 48 SdHoareTripleChecker+Valid, 4.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 45 mSDsluCounter, 405 SdHoareTripleChecker+Invalid, 4.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 16 IncrementalHoareTripleChecker+Unchecked, 285 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 150 IncrementalHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 135 mSDtfsCounter, 150 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 138 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 8.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=5, InterpolantAutomatonStates: 44, 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, 9 MinimizatonAttempts, 21 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 20 PreInvPairs, 27 NumberOfFragments, 53 HoareAnnotationTreeSize, 20 FomulaSimplifications, 6 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 173 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 115 NumberOfCodeBlocks, 109 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 129 ConstructedInterpolants, 6 QuantifiedInterpolants, 690 SizeOfPredicates, 10 NumberOfNonLiveVariables, 415 ConjunctsInSsa, 54 ConjunctsInUnsatCore, 11 InterpolantComputations, 8 PerfectInterpolantSequences, 21/28 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: 48]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((1 <= counter && q == 0) && A == r) || ((((q == 0 && B == b) && counter == 0) && A == r) && B == 1) RESULT: Ultimate proved your program to be correct! [2021-11-23 03:10:03,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbc5144-074b-4736-87ee-5ed33a908c13/bin/utaipan-EQgc7hIp5V/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