./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/num_conversion_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7 --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 bdb7543d1c240ce49edc036e26416805e34b577c5ba56fd044d3b26828ca42a8 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:15:45,144 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:15:45,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:15:45,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:15:45,180 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:15:45,182 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:15:45,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:15:45,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:15:45,189 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:15:45,190 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:15:45,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:15:45,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:15:45,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:15:45,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:15:45,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:15:45,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:15:45,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:15:45,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:15:45,205 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:15:45,208 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:15:45,210 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:15:45,212 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:15:45,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:15:45,215 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:15:45,219 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:15:45,220 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:15:45,220 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:15:45,222 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:15:45,222 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:15:45,223 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:15:45,224 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:15:45,225 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:15:45,226 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:15:45,227 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:15:45,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:15:45,229 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:15:45,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:15:45,230 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:15:45,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:15:45,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:15:45,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:15:45,233 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:15:45,258 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:15:45,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:15:45,259 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:15:45,260 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:15:45,260 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:15:45,261 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:15:45,261 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:15:45,261 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:15:45,262 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:15:45,262 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:15:45,262 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:15:45,262 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:15:45,263 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:15:45,263 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:15:45,263 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:15:45,264 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:15:45,264 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:15:45,264 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:15:45,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:15:45,265 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:15:45,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:15:45,266 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:15:45,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:15:45,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:15:45,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:15:45,267 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:15:45,267 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:15:45,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:15:45,268 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:15:45,268 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:15:45,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:15:45,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:15:45,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:15:45,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:15:45,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:15:45,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:15:45,270 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:15:45,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:15:45,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:15:45,271 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:15:45,271 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:15:45,271 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_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bdb7543d1c240ce49edc036e26416805e34b577c5ba56fd044d3b26828ca42a8 [2021-11-25 19:15:45,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:15:45,596 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:15:45,598 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:15:45,600 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:15:45,602 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:15:45,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/bitvector/num_conversion_1.c [2021-11-25 19:15:45,699 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/data/177875135/29bda3c9cdf34f08b5ad3246fb849e20/FLAG90450d7ae [2021-11-25 19:15:46,175 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:15:46,175 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/sv-benchmarks/c/bitvector/num_conversion_1.c [2021-11-25 19:15:46,183 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/data/177875135/29bda3c9cdf34f08b5ad3246fb849e20/FLAG90450d7ae [2021-11-25 19:15:46,563 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/data/177875135/29bda3c9cdf34f08b5ad3246fb849e20 [2021-11-25 19:15:46,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:15:46,568 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:15:46,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:15:46,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:15:46,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:15:46,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:15:46" (1/1) ... [2021-11-25 19:15:46,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@546b4b64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:46, skipping insertion in model container [2021-11-25 19:15:46,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:15:46" (1/1) ... [2021-11-25 19:15:46,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:15:46,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:15:46,810 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_0067c357-eb25-424f-87bf-3cde13b082d1/sv-benchmarks/c/bitvector/num_conversion_1.c[673,686] [2021-11-25 19:15:46,828 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:15:46,839 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:15:46,854 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_0067c357-eb25-424f-87bf-3cde13b082d1/sv-benchmarks/c/bitvector/num_conversion_1.c[673,686] [2021-11-25 19:15:46,861 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:15:46,877 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:15:46,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:46 WrapperNode [2021-11-25 19:15:46,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:15:46,880 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:15:46,880 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:15:46,880 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:15:46,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:46" (1/1) ... [2021-11-25 19:15:46,898 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:46" (1/1) ... [2021-11-25 19:15:46,918 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2021-11-25 19:15:46,919 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:15:46,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:15:46,920 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:15:46,920 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:15:46,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:46" (1/1) ... [2021-11-25 19:15:46,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:46" (1/1) ... [2021-11-25 19:15:46,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:46" (1/1) ... [2021-11-25 19:15:46,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:46" (1/1) ... [2021-11-25 19:15:46,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:46" (1/1) ... [2021-11-25 19:15:46,941 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:46" (1/1) ... [2021-11-25 19:15:46,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:46" (1/1) ... [2021-11-25 19:15:46,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:15:46,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:15:46,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:15:46,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:15:46,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:46" (1/1) ... [2021-11-25 19:15:46,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:15:46,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:15:46,986 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:15:46,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:15:47,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:15:47,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:15:47,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:15:47,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:15:47,100 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:15:47,101 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:15:47,199 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:15:47,229 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:15:47,229 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 19:15:47,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:15:47 BoogieIcfgContainer [2021-11-25 19:15:47,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:15:47,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:15:47,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:15:47,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:15:47,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:15:46" (1/3) ... [2021-11-25 19:15:47,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f49a06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:15:47, skipping insertion in model container [2021-11-25 19:15:47,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:46" (2/3) ... [2021-11-25 19:15:47,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f49a06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:15:47, skipping insertion in model container [2021-11-25 19:15:47,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:15:47" (3/3) ... [2021-11-25 19:15:47,244 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_1.c [2021-11-25 19:15:47,250 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:15:47,251 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:15:47,306 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:15:47,313 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 [2021-11-25 19:15:47,314 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:15:47,327 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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) [2021-11-25 19:15:47,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 19:15:47,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:15:47,334 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 19:15:47,334 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:15:47,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:15:47,341 INFO L85 PathProgramCache]: Analyzing trace with hash 2098665, now seen corresponding path program 1 times [2021-11-25 19:15:47,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:15:47,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6618125] [2021-11-25 19:15:47,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:47,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:15:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:15:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:15:47,531 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:15:47,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6618125] [2021-11-25 19:15:47,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6618125] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:15:47,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:15:47,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:15:47,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567869024] [2021-11-25 19:15:47,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:15:47,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:15:47,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:15:47,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:15:47,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:15:47,577 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-11-25 19:15:47,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:15:47,608 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-25 19:15:47,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:15:47,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-25 19:15:47,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:15:47,622 INFO L225 Difference]: With dead ends: 13 [2021-11-25 19:15:47,622 INFO L226 Difference]: Without dead ends: 6 [2021-11-25 19:15:47,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:15:47,631 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:15:47,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:15:47,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-25 19:15:47,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-25 19:15:47,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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) [2021-11-25 19:15:47,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-25 19:15:47,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-25 19:15:47,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:15:47,686 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-25 19:15:47,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-11-25 19:15:47,686 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-25 19:15:47,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 19:15:47,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:15:47,687 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 19:15:47,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:15:47,688 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:15:47,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:15:47,689 INFO L85 PathProgramCache]: Analyzing trace with hash 65017257, now seen corresponding path program 1 times [2021-11-25 19:15:47,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:15:47,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808481402] [2021-11-25 19:15:47,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:47,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:15:47,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:15:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:15:47,866 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:15:47,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808481402] [2021-11-25 19:15:47,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808481402] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:15:47,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963826320] [2021-11-25 19:15:47,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:47,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:15:47,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:15:47,870 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:15:47,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:15:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:15:47,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:15:47,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:15:47,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:15:48,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:15:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:15:48,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963826320] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:15:48,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [838539870] [2021-11-25 19:15:48,065 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-25 19:15:48,066 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:15:48,071 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:15:48,078 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:15:48,079 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:15:48,710 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:15:48,854 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '69#(and (= (ite (= (mod |ULTIMATE.start_main_~y~0#1| 256) (mod |ULTIMATE.start_main_~x~0#1| 256)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 8 (mod |ULTIMATE.start_main_~c~0#1| 256)) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 37) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:15:48,854 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:15:48,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:15:48,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-25 19:15:48,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68817732] [2021-11-25 19:15:48,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:15:48,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:15:48,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:15:48,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:15:48,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:15:48,866 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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) [2021-11-25 19:15:48,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:15:48,927 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2021-11-25 19:15:48,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:15:48,935 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-25 19:15:48,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:15:48,936 INFO L225 Difference]: With dead ends: 12 [2021-11-25 19:15:48,936 INFO L226 Difference]: Without dead ends: 9 [2021-11-25 19:15:48,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:15:48,942 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:15:48,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:15:48,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-25 19:15:48,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-25 19:15:48,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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) [2021-11-25 19:15:48,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-25 19:15:48,954 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-25 19:15:48,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:15:48,955 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-25 19:15:48,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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) [2021-11-25 19:15:48,956 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-25 19:15:48,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 19:15:48,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:15:48,957 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-11-25 19:15:48,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:15:49,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:15:49,168 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:15:49,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:15:49,171 INFO L85 PathProgramCache]: Analyzing trace with hash -142215703, now seen corresponding path program 2 times [2021-11-25 19:15:49,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:15:49,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774763680] [2021-11-25 19:15:49,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:49,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:15:49,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:15:49,362 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:15:49,362 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:15:49,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774763680] [2021-11-25 19:15:49,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774763680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:15:49,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924844321] [2021-11-25 19:15:49,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:15:49,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:15:49,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:15:49,365 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:15:49,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:15:49,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:15:49,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:15:49,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 19:15:49,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:15:49,534 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:15:49,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:15:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:15:49,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924844321] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:15:49,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [63593640] [2021-11-25 19:15:49,670 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-25 19:15:49,670 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:15:49,671 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:15:49,671 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:15:49,671 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:15:50,025 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:15:50,171 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '163#(and (= (ite (= (mod |ULTIMATE.start_main_~y~0#1| 256) (mod |ULTIMATE.start_main_~x~0#1| 256)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 8 (mod |ULTIMATE.start_main_~c~0#1| 256)) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 37) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:15:50,171 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:15:50,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:15:50,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2021-11-25 19:15:50,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672507859] [2021-11-25 19:15:50,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:15:50,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-25 19:15:50,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:15:50,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-25 19:15:50,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-11-25 19:15:50,175 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 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) [2021-11-25 19:15:50,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:15:50,345 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2021-11-25 19:15:50,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 19:15:50,348 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-25 19:15:50,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:15:50,348 INFO L225 Difference]: With dead ends: 16 [2021-11-25 19:15:50,349 INFO L226 Difference]: Without dead ends: 13 [2021-11-25 19:15:50,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-11-25 19:15:50,351 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:15:50,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:15:50,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-25 19:15:50,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-25 19:15:50,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 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) [2021-11-25 19:15:50,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-11-25 19:15:50,361 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 8 [2021-11-25 19:15:50,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:15:50,361 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-11-25 19:15:50,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 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) [2021-11-25 19:15:50,362 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-11-25 19:15:50,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 19:15:50,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:15:50,365 INFO L514 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1] [2021-11-25 19:15:50,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-25 19:15:50,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:15:50,580 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:15:50,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:15:50,580 INFO L85 PathProgramCache]: Analyzing trace with hash -361503255, now seen corresponding path program 3 times [2021-11-25 19:15:50,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:15:50,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800019273] [2021-11-25 19:15:50,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:50,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:15:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 19:15:50,629 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 19:15:50,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 19:15:50,739 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-25 19:15:50,743 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 19:15:50,744 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 19:15:50,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:15:50,751 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1] [2021-11-25 19:15:50,754 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 19:15:50,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 07:15:50 BoogieIcfgContainer [2021-11-25 19:15:50,791 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 19:15:50,791 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 19:15:50,792 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 19:15:50,792 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 19:15:50,793 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:15:47" (3/4) ... [2021-11-25 19:15:50,796 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-25 19:15:50,797 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 19:15:50,798 INFO L158 Benchmark]: Toolchain (without parser) took 4229.41ms. Allocated memory was 127.9MB in the beginning and 172.0MB in the end (delta: 44.0MB). Free memory was 87.9MB in the beginning and 108.2MB in the end (delta: -20.3MB). Peak memory consumption was 23.5MB. Max. memory is 16.1GB. [2021-11-25 19:15:50,799 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 127.9MB. Free memory was 104.6MB in the beginning and 104.5MB in the end (delta: 70.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:15:50,799 INFO L158 Benchmark]: CACSL2BoogieTranslator took 302.77ms. Allocated memory is still 127.9MB. Free memory was 87.7MB in the beginning and 103.1MB in the end (delta: -15.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 19:15:50,800 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.57ms. Allocated memory is still 127.9MB. Free memory was 103.1MB in the beginning and 101.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:15:50,800 INFO L158 Benchmark]: Boogie Preprocessor took 24.56ms. Allocated memory is still 127.9MB. Free memory was 101.7MB in the beginning and 100.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:15:50,801 INFO L158 Benchmark]: RCFGBuilder took 287.60ms. Allocated memory is still 127.9MB. Free memory was 100.7MB in the beginning and 91.1MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 19:15:50,802 INFO L158 Benchmark]: TraceAbstraction took 3555.89ms. Allocated memory was 127.9MB in the beginning and 172.0MB in the end (delta: 44.0MB). Free memory was 90.4MB in the beginning and 108.2MB in the end (delta: -17.8MB). Peak memory consumption was 28.2MB. Max. memory is 16.1GB. [2021-11-25 19:15:50,802 INFO L158 Benchmark]: Witness Printer took 5.51ms. Allocated memory is still 172.0MB. Free memory is still 108.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:15:50,805 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 127.9MB. Free memory was 104.6MB in the beginning and 104.5MB in the end (delta: 70.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 302.77ms. Allocated memory is still 127.9MB. Free memory was 87.7MB in the beginning and 103.1MB in the end (delta: -15.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.57ms. Allocated memory is still 127.9MB. Free memory was 103.1MB in the beginning and 101.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.56ms. Allocated memory is still 127.9MB. Free memory was 101.7MB in the beginning and 100.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 287.60ms. Allocated memory is still 127.9MB. Free memory was 100.7MB in the beginning and 91.1MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 3555.89ms. Allocated memory was 127.9MB in the beginning and 172.0MB in the end (delta: 44.0MB). Free memory was 90.4MB in the beginning and 108.2MB in the end (delta: -17.8MB). Peak memory consumption was 28.2MB. Max. memory is 16.1GB. * Witness Printer took 5.51ms. Allocated memory is still 172.0MB. Free memory is still 108.2MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 32, overapproximation of bitwiseAnd at line 33. Possible FailurePath: [L24] unsigned char x; [L25] unsigned char y; [L26] unsigned char c; [L28] x = 37 [L29] y = 0 [L30] c = 0 VAL [c=0, x=37, y=0] [L31] COND TRUE c < (unsigned char)8 [L32] unsigned char i = ((unsigned char)1) << c; [L33] unsigned char bit = x & i; [L34] COND FALSE !(bit != (unsigned char)0) [L37] c = c + ((unsigned char)1) VAL [bit=0, c=1, i=0, x=37, y=0] [L31] COND TRUE c < (unsigned char)8 [L32] unsigned char i = ((unsigned char)1) << c; [L33] unsigned char bit = x & i; [L34] COND TRUE bit != (unsigned char)0 [L35] y = y + i [L37] c = c + ((unsigned char)1) VAL [bit=1, c=2, i=0, x=37, y=0] [L31] COND TRUE c < (unsigned char)8 [L32] unsigned char i = ((unsigned char)1) << c; [L33] unsigned char bit = x & i; [L34] COND TRUE bit != (unsigned char)0 [L35] y = y + i [L37] c = c + ((unsigned char)1) VAL [bit=1, c=3, i=0, x=37, y=0] [L31] COND TRUE c < (unsigned char)8 [L32] unsigned char i = ((unsigned char)1) << c; [L33] unsigned char bit = x & i; [L34] COND TRUE bit != (unsigned char)0 [L35] y = y + i [L37] c = c + ((unsigned char)1) VAL [bit=1, c=4, i=0, x=37, y=0] [L31] COND TRUE c < (unsigned char)8 [L32] unsigned char i = ((unsigned char)1) << c; [L33] unsigned char bit = x & i; [L34] COND TRUE bit != (unsigned char)0 [L35] y = y + i [L37] c = c + ((unsigned char)1) VAL [bit=1, c=5, i=0, x=37, y=0] [L31] COND TRUE c < (unsigned char)8 [L32] unsigned char i = ((unsigned char)1) << c; [L33] unsigned char bit = x & i; [L34] COND TRUE bit != (unsigned char)0 [L35] y = y + i [L37] c = c + ((unsigned char)1) VAL [bit=1, c=6, i=0, x=37, y=0] [L31] COND TRUE c < (unsigned char)8 [L32] unsigned char i = ((unsigned char)1) << c; [L33] unsigned char bit = x & i; [L34] COND TRUE bit != (unsigned char)0 [L35] y = y + i [L37] c = c + ((unsigned char)1) VAL [bit=1, c=7, i=0, x=37, y=0] [L31] COND TRUE c < (unsigned char)8 [L32] unsigned char i = ((unsigned char)1) << c; [L33] unsigned char bit = x & i; [L34] COND FALSE !(bit != (unsigned char)0) [L37] c = c + ((unsigned char)1) VAL [bit=0, c=8, i=0, x=37, y=0] [L31] COND FALSE !(c < (unsigned char)8) [L39] CALL __VERIFIER_assert(x == y) [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.4s, OverallIterations: 4, TraceHistogramMax: 8, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 32 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 26 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 62 IncrementalHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 7 mSDtfsCounter, 62 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=3, InterpolantAutomatonStates: 19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 180 SizeOfPredicates, 3 NumberOfNonLiveVariables, 98 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-25 19:15:50,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7 --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 bdb7543d1c240ce49edc036e26416805e34b577c5ba56fd044d3b26828ca42a8 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:15:53,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:15:53,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:15:53,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:15:53,654 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:15:53,656 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:15:53,658 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:15:53,662 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:15:53,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:15:53,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:15:53,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:15:53,676 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:15:53,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:15:53,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:15:53,689 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:15:53,694 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:15:53,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:15:53,699 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:15:53,716 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:15:53,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:15:53,728 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:15:53,729 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:15:53,740 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:15:53,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:15:53,748 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:15:53,751 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:15:53,751 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:15:53,758 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:15:53,762 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:15:53,763 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:15:53,764 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:15:53,765 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:15:53,767 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:15:53,769 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:15:53,771 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:15:53,772 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:15:53,773 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:15:53,774 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:15:53,774 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:15:53,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:15:53,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:15:53,784 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-25 19:15:53,843 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:15:53,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:15:53,845 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:15:53,845 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:15:53,846 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:15:53,847 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:15:53,847 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:15:53,847 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:15:53,848 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:15:53,848 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:15:53,849 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:15:53,850 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:15:53,852 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:15:53,852 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:15:53,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:15:53,853 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:15:53,853 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:15:53,853 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:15:53,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:15:53,854 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 19:15:53,854 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 19:15:53,854 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 19:15:53,855 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:15:53,855 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:15:53,855 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:15:53,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:15:53,856 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:15:53,856 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 19:15:53,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:15:53,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:15:53,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:15:53,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:15:53,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:15:53,858 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 19:15:53,859 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 19:15:53,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:15:53,859 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:15:53,860 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:15:53,860 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bdb7543d1c240ce49edc036e26416805e34b577c5ba56fd044d3b26828ca42a8 [2021-11-25 19:15:54,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:15:54,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:15:54,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:15:54,403 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:15:54,404 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:15:54,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/bitvector/num_conversion_1.c [2021-11-25 19:15:54,499 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/data/3f8331d05/5f4ad91b14a344168c00526d1637da67/FLAG344c1529d [2021-11-25 19:15:55,088 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:15:55,089 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/sv-benchmarks/c/bitvector/num_conversion_1.c [2021-11-25 19:15:55,095 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/data/3f8331d05/5f4ad91b14a344168c00526d1637da67/FLAG344c1529d [2021-11-25 19:15:55,445 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/data/3f8331d05/5f4ad91b14a344168c00526d1637da67 [2021-11-25 19:15:55,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:15:55,451 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:15:55,453 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:15:55,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:15:55,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:15:55,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:15:55" (1/1) ... [2021-11-25 19:15:55,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@736d8d8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:55, skipping insertion in model container [2021-11-25 19:15:55,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:15:55" (1/1) ... [2021-11-25 19:15:55,478 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:15:55,501 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:15:55,667 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_0067c357-eb25-424f-87bf-3cde13b082d1/sv-benchmarks/c/bitvector/num_conversion_1.c[673,686] [2021-11-25 19:15:55,683 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:15:55,707 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:15:55,767 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_0067c357-eb25-424f-87bf-3cde13b082d1/sv-benchmarks/c/bitvector/num_conversion_1.c[673,686] [2021-11-25 19:15:55,801 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:15:55,820 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:15:55,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:55 WrapperNode [2021-11-25 19:15:55,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:15:55,823 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:15:55,823 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:15:55,823 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:15:55,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:55" (1/1) ... [2021-11-25 19:15:55,843 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:55" (1/1) ... [2021-11-25 19:15:55,868 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2021-11-25 19:15:55,868 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:15:55,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:15:55,870 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:15:55,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:15:55,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:55" (1/1) ... [2021-11-25 19:15:55,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:55" (1/1) ... [2021-11-25 19:15:55,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:55" (1/1) ... [2021-11-25 19:15:55,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:55" (1/1) ... [2021-11-25 19:15:55,905 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:55" (1/1) ... [2021-11-25 19:15:55,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:55" (1/1) ... [2021-11-25 19:15:55,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:55" (1/1) ... [2021-11-25 19:15:55,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:15:55,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:15:55,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:15:55,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:15:55,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:55" (1/1) ... [2021-11-25 19:15:55,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:15:55,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:15:55,973 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:15:55,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:15:56,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:15:56,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:15:56,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:15:56,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 19:15:56,136 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:15:56,138 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:15:56,312 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:15:56,323 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:15:56,324 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 19:15:56,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:15:56 BoogieIcfgContainer [2021-11-25 19:15:56,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:15:56,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:15:56,329 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:15:56,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:15:56,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:15:55" (1/3) ... [2021-11-25 19:15:56,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46fe14d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:15:56, skipping insertion in model container [2021-11-25 19:15:56,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:15:55" (2/3) ... [2021-11-25 19:15:56,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46fe14d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:15:56, skipping insertion in model container [2021-11-25 19:15:56,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:15:56" (3/3) ... [2021-11-25 19:15:56,337 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_1.c [2021-11-25 19:15:56,344 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:15:56,344 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:15:56,432 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:15:56,446 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 [2021-11-25 19:15:56,447 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:15:56,478 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) [2021-11-25 19:15:56,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 19:15:56,490 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:15:56,491 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 19:15:56,492 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:15:56,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:15:56,500 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2021-11-25 19:15:56,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:15:56,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2068698790] [2021-11-25 19:15:56,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:56,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:15:56,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:15:56,524 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:15:56,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 19:15:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:15:56,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-25 19:15:56,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:15:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:15:56,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:15:56,670 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:15:56,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2068698790] [2021-11-25 19:15:56,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2068698790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:15:56,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:15:56,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:15:56,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136052004] [2021-11-25 19:15:56,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:15:56,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 19:15:56,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:15:56,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 19:15:56,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:15:56,717 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-11-25 19:15:56,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:15:56,733 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-11-25 19:15:56,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 19:15:56,736 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 19:15:56,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:15:56,746 INFO L225 Difference]: With dead ends: 21 [2021-11-25 19:15:56,746 INFO L226 Difference]: Without dead ends: 9 [2021-11-25 19:15:56,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:15:56,754 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:15:56,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:15:56,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-25 19:15:56,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-25 19:15:56,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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) [2021-11-25 19:15:56,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-11-25 19:15:56,817 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-11-25 19:15:56,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:15:56,818 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-11-25 19:15:56,818 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), 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) [2021-11-25 19:15:56,819 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-11-25 19:15:56,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 19:15:56,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:15:56,820 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 19:15:56,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:15:57,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:15:57,034 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:15:57,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:15:57,036 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2021-11-25 19:15:57,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:15:57,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1949941509] [2021-11-25 19:15:57,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:57,038 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:15:57,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:15:57,040 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:15:57,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 19:15:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:15:57,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:15:57,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:15:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:15:57,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:15:57,183 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:15:57,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1949941509] [2021-11-25 19:15:57,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1949941509] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:15:57,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:15:57,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:15:57,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364407779] [2021-11-25 19:15:57,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:15:57,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:15:57,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:15:57,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:15:57,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:15:57,189 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-11-25 19:15:57,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:15:57,205 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-11-25 19:15:57,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:15:57,206 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 19:15:57,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:15:57,207 INFO L225 Difference]: With dead ends: 16 [2021-11-25 19:15:57,208 INFO L226 Difference]: Without dead ends: 12 [2021-11-25 19:15:57,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:15:57,211 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:15:57,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:15:57,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-25 19:15:57,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2021-11-25 19:15:57,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2021-11-25 19:15:57,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-25 19:15:57,218 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-11-25 19:15:57,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:15:57,218 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-25 19:15:57,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-11-25 19:15:57,219 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-25 19:15:57,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 19:15:57,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:15:57,220 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:15:57,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:15:57,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:15:57,434 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:15:57,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:15:57,435 INFO L85 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2021-11-25 19:15:57,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:15:57,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [366097789] [2021-11-25 19:15:57,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:57,437 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:15:57,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:15:57,439 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:15:57,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 19:15:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:15:57,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:15:57,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:15:57,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:15:57,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:15:57,573 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:15:57,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [366097789] [2021-11-25 19:15:57,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [366097789] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:15:57,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:15:57,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:15:57,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916047391] [2021-11-25 19:15:57,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:15:57,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:15:57,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:15:57,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:15:57,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:15:57,578 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-11-25 19:15:57,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:15:57,634 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-11-25 19:15:57,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:15:57,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 19:15:57,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:15:57,649 INFO L225 Difference]: With dead ends: 24 [2021-11-25 19:15:57,649 INFO L226 Difference]: Without dead ends: 17 [2021-11-25 19:15:57,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:15:57,652 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:15:57,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 19 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:15:57,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-25 19:15:57,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 11. [2021-11-25 19:15:57,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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) [2021-11-25 19:15:57,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-25 19:15:57,658 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2021-11-25 19:15:57,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:15:57,659 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-25 19:15:57,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-11-25 19:15:57,660 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-25 19:15:57,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 19:15:57,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:15:57,676 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:15:57,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:15:57,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:15:57,890 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:15:57,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:15:57,891 INFO L85 PathProgramCache]: Analyzing trace with hash 584467323, now seen corresponding path program 1 times [2021-11-25 19:15:57,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:15:57,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1861941848] [2021-11-25 19:15:57,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:57,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:15:57,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:15:57,906 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:15:57,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 19:15:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:15:57,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:15:57,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:15:57,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:15:57,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:15:58,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:15:58,043 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:15:58,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1861941848] [2021-11-25 19:15:58,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1861941848] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:15:58,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [539391626] [2021-11-25 19:15:58,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:58,045 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:15:58,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:15:58,071 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:15:58,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-25 19:15:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:15:58,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:15:58,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:15:58,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:15:58,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:15:58,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:15:58,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [539391626] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:15:58,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607876963] [2021-11-25 19:15:58,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:58,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:15:58,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:15:58,316 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:15:58,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:15:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:15:58,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:15:58,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:15:58,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:15:58,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:15:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:15:58,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607876963] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:15:58,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:15:58,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 5] total 7 [2021-11-25 19:15:58,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44799589] [2021-11-25 19:15:58,456 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:15:58,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:15:58,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:15:58,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:15:58,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:15:58,459 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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) [2021-11-25 19:15:58,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:15:58,509 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2021-11-25 19:15:58,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:15:58,510 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 19:15:58,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:15:58,511 INFO L225 Difference]: With dead ends: 23 [2021-11-25 19:15:58,511 INFO L226 Difference]: Without dead ends: 19 [2021-11-25 19:15:58,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:15:58,514 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:15:58,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 29 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:15:58,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-25 19:15:58,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-25 19:15:58,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 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) [2021-11-25 19:15:58,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-11-25 19:15:58,522 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 9 [2021-11-25 19:15:58,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:15:58,523 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-11-25 19:15:58,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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) [2021-11-25 19:15:58,523 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-11-25 19:15:58,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 19:15:58,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:15:58,525 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:15:58,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:15:58,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:15:58,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:15:59,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:15:59,138 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:15:59,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:15:59,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1843204080, now seen corresponding path program 1 times [2021-11-25 19:15:59,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:15:59,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999044475] [2021-11-25 19:15:59,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:59,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:15:59,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:15:59,141 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:15:59,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 19:15:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:15:59,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:15:59,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:15:59,370 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:15:59,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:15:59,574 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:15:59,575 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:15:59,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999044475] [2021-11-25 19:15:59,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999044475] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:15:59,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [791759770] [2021-11-25 19:15:59,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:59,576 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:15:59,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:15:59,580 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:15:59,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-25 19:15:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:15:59,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:15:59,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:15:59,772 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:15:59,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:15:59,853 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:15:59,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [791759770] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:15:59,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540235843] [2021-11-25 19:15:59,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:59,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:15:59,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:15:59,855 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:15:59,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:15:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:15:59,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:15:59,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:16:00,027 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:16:00,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:16:00,265 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:16:00,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540235843] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:16:00,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:16:00,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 13 [2021-11-25 19:16:00,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911111402] [2021-11-25 19:16:00,267 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:16:00,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 19:16:00,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:16:00,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 19:16:00,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-25 19:16:00,274 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 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) [2021-11-25 19:16:00,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:16:00,798 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2021-11-25 19:16:00,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-25 19:16:00,798 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-25 19:16:00,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:16:00,800 INFO L225 Difference]: With dead ends: 56 [2021-11-25 19:16:00,800 INFO L226 Difference]: Without dead ends: 47 [2021-11-25 19:16:00,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-11-25 19:16:00,802 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 42 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:16:00,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 55 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:16:00,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-25 19:16:00,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2021-11-25 19:16:00,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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) [2021-11-25 19:16:00,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-11-25 19:16:00,816 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 18 [2021-11-25 19:16:00,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:16:00,816 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-11-25 19:16:00,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 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) [2021-11-25 19:16:00,817 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-11-25 19:16:00,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 19:16:00,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:16:00,819 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 19:16:00,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:16:01,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:16:01,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:16:01,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:16:01,421 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:16:01,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:16:01,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1771704846, now seen corresponding path program 2 times [2021-11-25 19:16:01,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:16:01,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1486110692] [2021-11-25 19:16:01,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:16:01,423 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:16:01,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:16:01,424 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:16:01,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-25 19:16:01,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:16:01,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:16:01,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:16:01,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:16:01,536 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:16:01,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:16:01,676 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:16:01,677 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:16:01,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1486110692] [2021-11-25 19:16:01,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1486110692] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:16:01,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1986098932] [2021-11-25 19:16:01,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:16:01,678 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:16:01,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:16:01,683 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:16:01,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-25 19:16:01,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:16:01,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:16:01,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:16:01,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:16:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:16:01,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:16:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:16:01,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1986098932] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:16:01,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981324484] [2021-11-25 19:16:01,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:16:01,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:16:01,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:16:01,900 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:16:01,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 19:16:01,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:16:01,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:16:01,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:16:01,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:16:02,015 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:16:02,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:16:02,257 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:16:02,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981324484] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:16:02,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:16:02,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 8] total 16 [2021-11-25 19:16:02,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138438491] [2021-11-25 19:16:02,258 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:16:02,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-25 19:16:02,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:16:02,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-25 19:16:02,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-25 19:16:02,261 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 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) [2021-11-25 19:16:02,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:16:02,551 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2021-11-25 19:16:02,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 19:16:02,552 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-25 19:16:02,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:16:02,553 INFO L225 Difference]: With dead ends: 41 [2021-11-25 19:16:02,553 INFO L226 Difference]: Without dead ends: 37 [2021-11-25 19:16:02,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2021-11-25 19:16:02,555 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 77 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:16:02,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 75 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:16:02,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-25 19:16:02,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-25 19:16:02,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 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) [2021-11-25 19:16:02,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-11-25 19:16:02,566 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 18 [2021-11-25 19:16:02,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:16:02,566 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-11-25 19:16:02,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 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) [2021-11-25 19:16:02,567 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-11-25 19:16:02,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-25 19:16:02,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:16:02,568 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-11-25 19:16:02,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:16:02,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-25 19:16:03,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 19:16:03,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:16:03,184 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:16:03,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:16:03,185 INFO L85 PathProgramCache]: Analyzing trace with hash -29656432, now seen corresponding path program 3 times [2021-11-25 19:16:03,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:16:03,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979699132] [2021-11-25 19:16:03,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:16:03,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:16:03,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:16:03,187 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:16:03,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-25 19:16:03,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-25 19:16:03,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:16:03,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 19:16:03,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:16:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 83 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 19:16:04,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:16:06,335 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 19:16:06,336 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:16:06,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979699132] [2021-11-25 19:16:06,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979699132] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:16:06,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [792324474] [2021-11-25 19:16:06,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:16:06,339 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:16:06,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:16:06,340 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:16:06,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-25 19:16:06,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-25 19:16:06,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:16:06,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 19:16:06,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:16:06,842 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 83 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 19:16:06,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:16:07,469 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 19:16:07,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [792324474] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:16:07,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313338927] [2021-11-25 19:16:07,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:16:07,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:16:07,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:16:07,471 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:16:07,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 19:16:07,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-25 19:16:07,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:16:07,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-25 19:16:07,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:16:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:16:08,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:16:10,572 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:16:10,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313338927] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:16:10,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:16:10,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 19, 20] total 54 [2021-11-25 19:16:10,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734443284] [2021-11-25 19:16:10,574 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:16:10,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-25 19:16:10,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:16:10,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-25 19:16:10,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=2416, Unknown=0, NotChecked=0, Total=2862 [2021-11-25 19:16:10,578 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 54 states, 54 states have (on average 1.6296296296296295) internal successors, (88), 54 states have internal predecessors, (88), 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) [2021-11-25 19:16:24,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:16:24,193 INFO L93 Difference]: Finished difference Result 160 states and 206 transitions. [2021-11-25 19:16:24,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-25 19:16:24,194 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.6296296296296295) internal successors, (88), 54 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-25 19:16:24,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:16:24,197 INFO L225 Difference]: With dead ends: 160 [2021-11-25 19:16:24,197 INFO L226 Difference]: Without dead ends: 144 [2021-11-25 19:16:24,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3180 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=2135, Invalid=9421, Unknown=0, NotChecked=0, Total=11556 [2021-11-25 19:16:24,203 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 201 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 447 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:16:24,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 198 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 474 Invalid, 0 Unknown, 447 Unchecked, 0.9s Time] [2021-11-25 19:16:24,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-25 19:16:24,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 123. [2021-11-25 19:16:24,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.3278688524590163) internal successors, (162), 122 states have internal predecessors, (162), 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) [2021-11-25 19:16:24,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 162 transitions. [2021-11-25 19:16:24,225 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 162 transitions. Word has length 30 [2021-11-25 19:16:24,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:16:24,226 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 162 transitions. [2021-11-25 19:16:24,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.6296296296296295) internal successors, (88), 54 states have internal predecessors, (88), 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) [2021-11-25 19:16:24,226 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 162 transitions. [2021-11-25 19:16:24,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-25 19:16:24,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:16:24,228 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-25 19:16:24,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-11-25 19:16:24,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-25 19:16:24,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 19:16:24,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:16:24,844 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:16:24,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:16:24,844 INFO L85 PathProgramCache]: Analyzing trace with hash -86914734, now seen corresponding path program 4 times [2021-11-25 19:16:24,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:16:24,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [594171598] [2021-11-25 19:16:24,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:16:24,845 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:16:24,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:16:24,846 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:16:24,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:16:24,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:16:24,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-25 19:16:24,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:16:24,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:16:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:16:25,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:16:25,530 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:16:25,531 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:16:25,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [594171598] [2021-11-25 19:16:25,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [594171598] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:16:25,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [453742300] [2021-11-25 19:16:25,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:16:25,532 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:16:25,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:16:25,533 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:16:25,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-25 19:16:25,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:16:25,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:16:25,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:16:25,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:16:25,764 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:16:25,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:16:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:16:25,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [453742300] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:16:25,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412246557] [2021-11-25 19:16:25,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:16:25,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:16:25,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:16:25,906 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:16:25,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-25 19:16:25,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:16:25,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:16:25,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 19:16:25,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:16:26,158 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:16:26,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:16:26,956 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:16:26,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412246557] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:16:26,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:16:26,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 13] total 31 [2021-11-25 19:16:26,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976007177] [2021-11-25 19:16:26,958 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:16:26,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-25 19:16:26,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:16:26,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-25 19:16:26,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-11-25 19:16:26,961 INFO L87 Difference]: Start difference. First operand 123 states and 162 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 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) [2021-11-25 19:16:27,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:16:27,184 INFO L93 Difference]: Finished difference Result 123 states and 162 transitions. [2021-11-25 19:16:27,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 19:16:27,185 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-25 19:16:27,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:16:27,186 INFO L225 Difference]: With dead ends: 123 [2021-11-25 19:16:27,186 INFO L226 Difference]: Without dead ends: 0 [2021-11-25 19:16:27,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=381, Invalid=1025, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 19:16:27,189 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 77 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:16:27,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 37 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:16:27,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-25 19:16:27,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-25 19:16:27,191 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) [2021-11-25 19:16:27,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-25 19:16:27,191 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2021-11-25 19:16:27,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:16:27,192 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-25 19:16:27,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 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) [2021-11-25 19:16:27,192 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-25 19:16:27,192 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-25 19:16:27,195 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 19:16:27,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-25 19:16:27,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-25 19:16:27,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-25 19:16:27,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:16:27,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-25 19:16:28,012 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-25 19:16:28,012 INFO L854 garLoopResultBuilder]: At program point L31-2(lines 31 38) the Hoare annotation is: (let ((.cse2 (= (_ bv1 8) |ULTIMATE.start_main_~y~0#1|)) (.cse4 (= |ULTIMATE.start_main_~y~0#1| (_ bv5 8))) (.cse0 (= |ULTIMATE.start_main_~bit~0#1| (_ bv0 8))) (.cse3 (= |ULTIMATE.start_main_~y~0#1| (_ bv37 8))) (.cse1 (= |ULTIMATE.start_main_~x~0#1| (_ bv37 8)))) (or (and .cse0 (= |ULTIMATE.start_main_~c~0#1| (_ bv2 8)) .cse1 .cse2) (and (= (_ bv1 8) |ULTIMATE.start_main_~c~0#1|) (not (= ((_ zero_extend 24) |ULTIMATE.start_main_~bit~0#1|) (_ bv0 32))) .cse1 .cse2) (and (= |ULTIMATE.start_main_~c~0#1| (_ bv8 8)) .cse3 .cse1) (and (= |ULTIMATE.start_main_~y~0#1| (_ bv0 8)) (= |ULTIMATE.start_main_~c~0#1| (_ bv0 8)) .cse1) (and (= |ULTIMATE.start_main_~c~0#1| (_ bv3 8)) .cse4 (= (_ bv4 8) |ULTIMATE.start_main_~bit~0#1|) .cse1) (and .cse4 (= |ULTIMATE.start_main_~c~0#1| (_ bv5 8)) .cse0 .cse1) (and (= |ULTIMATE.start_main_~c~0#1| (_ bv7 8)) .cse3 .cse1 (= |ULTIMATE.start_main_~bit~0#1| ((_ extract 7 0) (bvand (_ bv37 32) ((_ zero_extend 24) ((_ extract 7 0) (bvshl (_ bv1 32) ((_ zero_extend 24) |ULTIMATE.start_main_~c~0#1|)))))))) (and .cse4 .cse0 (= |ULTIMATE.start_main_~c~0#1| (_ bv4 8)) .cse1) (and (= (_ bv6 8) |ULTIMATE.start_main_~c~0#1|) .cse3 .cse1))) [2021-11-25 19:16:28,013 INFO L858 garLoopResultBuilder]: For program point L31-3(lines 31 38) no Hoare annotation was computed. [2021-11-25 19:16:28,013 INFO L858 garLoopResultBuilder]: For program point L15(lines 15 17) no Hoare annotation was computed. [2021-11-25 19:16:28,013 INFO L861 garLoopResultBuilder]: At program point L15-2(lines 14 19) the Hoare annotation is: true [2021-11-25 19:16:28,013 INFO L858 garLoopResultBuilder]: For program point L34(lines 34 36) no Hoare annotation was computed. [2021-11-25 19:16:28,013 INFO L858 garLoopResultBuilder]: For program point L34-2(lines 34 36) no Hoare annotation was computed. [2021-11-25 19:16:28,013 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-25 19:16:28,013 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-25 19:16:28,013 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-25 19:16:28,014 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-11-25 19:16:28,014 INFO L858 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2021-11-25 19:16:28,014 INFO L861 garLoopResultBuilder]: At program point L41(lines 22 42) the Hoare annotation is: true [2021-11-25 19:16:28,017 INFO L732 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1] [2021-11-25 19:16:28,019 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 19:16:28,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 07:16:28 BoogieIcfgContainer [2021-11-25 19:16:28,036 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 19:16:28,036 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 19:16:28,036 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 19:16:28,037 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 19:16:28,047 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:15:56" (3/4) ... [2021-11-25 19:16:28,051 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-25 19:16:28,063 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-11-25 19:16:28,064 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-25 19:16:28,064 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-25 19:16:28,064 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-25 19:16:28,102 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 19:16:28,102 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 19:16:28,103 INFO L158 Benchmark]: Toolchain (without parser) took 32652.28ms. Allocated memory was 56.6MB in the beginning and 104.9MB in the end (delta: 48.2MB). Free memory was 34.3MB in the beginning and 49.2MB in the end (delta: -14.8MB). Peak memory consumption was 33.4MB. Max. memory is 16.1GB. [2021-11-25 19:16:28,103 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 56.6MB. Free memory was 36.5MB in the beginning and 36.5MB in the end (delta: 42.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:16:28,104 INFO L158 Benchmark]: CACSL2BoogieTranslator took 369.07ms. Allocated memory is still 56.6MB. Free memory was 34.1MB in the beginning and 39.0MB in the end (delta: -4.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 19:16:28,104 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.81ms. Allocated memory is still 56.6MB. Free memory was 39.0MB in the beginning and 37.5MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:16:28,105 INFO L158 Benchmark]: Boogie Preprocessor took 57.91ms. Allocated memory is still 56.6MB. Free memory was 37.5MB in the beginning and 36.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:16:28,105 INFO L158 Benchmark]: RCFGBuilder took 398.14ms. Allocated memory is still 56.6MB. Free memory was 36.5MB in the beginning and 28.3MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 19:16:28,106 INFO L158 Benchmark]: TraceAbstraction took 31707.50ms. Allocated memory was 56.6MB in the beginning and 104.9MB in the end (delta: 48.2MB). Free memory was 27.8MB in the beginning and 51.3MB in the end (delta: -23.5MB). Peak memory consumption was 26.1MB. Max. memory is 16.1GB. [2021-11-25 19:16:28,107 INFO L158 Benchmark]: Witness Printer took 65.81ms. Allocated memory is still 104.9MB. Free memory was 51.3MB in the beginning and 49.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:16:28,109 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 56.6MB. Free memory was 36.5MB in the beginning and 36.5MB in the end (delta: 42.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 369.07ms. Allocated memory is still 56.6MB. Free memory was 34.1MB in the beginning and 39.0MB in the end (delta: -4.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.81ms. Allocated memory is still 56.6MB. Free memory was 39.0MB in the beginning and 37.5MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 57.91ms. Allocated memory is still 56.6MB. Free memory was 37.5MB in the beginning and 36.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 398.14ms. Allocated memory is still 56.6MB. Free memory was 36.5MB in the beginning and 28.3MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 31707.50ms. Allocated memory was 56.6MB in the beginning and 104.9MB in the end (delta: 48.2MB). Free memory was 27.8MB in the beginning and 51.3MB in the end (delta: -23.5MB). Peak memory consumption was 26.1MB. Max. memory is 16.1GB. * Witness Printer took 65.81ms. Allocated memory is still 104.9MB. Free memory was 51.3MB in the beginning and 49.2MB 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: 16]: 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 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 31.6s, OverallIterations: 8, TraceHistogramMax: 8, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.1s, AutomataDifference: 14.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 430 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 430 mSDsluCounter, 441 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 447 IncrementalHoareTripleChecker+Unchecked, 366 mSDsCounter, 354 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 821 IncrementalHoareTripleChecker+Invalid, 1622 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 354 mSolverCounterUnsat, 75 mSDtfsCounter, 821 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 701 GetRequests, 503 SyntacticMatches, 5 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3401 ImplicationChecksByTransitivity, 19.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=123occurred in iteration=7, InterpolantAutomatonStates: 145, 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, 8 MinimizatonAttempts, 50 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 14 NumberOfFragments, 121 HoareAnnotationTreeSize, 3 FomulaSimplifications, 46 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 238 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 11.1s InterpolantComputationTime, 336 NumberOfCodeBlocks, 336 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 618 ConstructedInterpolants, 48 QuantifiedInterpolants, 9834 SizeOfPredicates, 60 NumberOfNonLiveVariables, 809 ConjunctsInSsa, 162 ConjunctsInUnsatCore, 33 InterpolantComputations, 3 PerfectInterpolantSequences, 198/1375 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: 22]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: ((((((((((bit == 0bv8 && c == 2bv8) && x == 37bv8) && 1bv8 == y) || (((1bv8 == c && !(~zero_extendFrom8To32(bit) == 0bv32)) && x == 37bv8) && 1bv8 == y)) || ((c == 8bv8 && y == 37bv8) && x == 37bv8)) || ((y == 0bv8 && c == 0bv8) && x == 37bv8)) || (((c == 3bv8 && y == 5bv8) && 4bv8 == bit) && x == 37bv8)) || (((y == 5bv8 && c == 5bv8) && bit == 0bv8) && x == 37bv8)) || (((c == 7bv8 && y == 37bv8) && x == 37bv8) && bit == ~bvand32(37bv32, ~zero_extendFrom8To32(~bvshl32(1bv32, ~zero_extendFrom8To32(c))[7:0]))[7:0])) || (((y == 5bv8 && bit == 0bv8) && c == 4bv8) && x == 37bv8)) || ((6bv8 == c && y == 37bv8) && x == 37bv8) - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-11-25 19:16:28,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0067c357-eb25-424f-87bf-3cde13b082d1/bin/utaipan-eEHZpOm5b7/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