./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/byte_add-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7dfc9f1e1cbceb1807370dcac22a0449d857eff9a54bdefbc84178983a910e84 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:57:23,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:57:23,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:57:23,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:57:23,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:57:23,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:57:23,080 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:57:23,085 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:57:23,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:57:23,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:57:23,098 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:57:23,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:57:23,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:57:23,104 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:57:23,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:57:23,112 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:57:23,115 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:57:23,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:57:23,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:57:23,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:57:23,133 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:57:23,135 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:57:23,136 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:57:23,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:57:23,146 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:57:23,146 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:57:23,147 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:57:23,149 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:57:23,150 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:57:23,152 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:57:23,152 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:57:23,153 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:57:23,155 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:57:23,157 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:57:23,158 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:57:23,159 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:57:23,160 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:57:23,160 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:57:23,160 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:57:23,161 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:57:23,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:57:23,163 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:57:23,214 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:57:23,214 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:57:23,215 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:57:23,215 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:57:23,222 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:57:23,223 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:57:23,223 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:57:23,224 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:57:23,224 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:57:23,224 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:57:23,225 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:57:23,226 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:57:23,226 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:57:23,226 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:57:23,226 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:57:23,227 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:57:23,227 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:57:23,227 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:57:23,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:57:23,229 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:57:23,229 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:57:23,229 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:57:23,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:57:23,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:57:23,230 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:57:23,230 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:57:23,232 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:57:23,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:57:23,233 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:57:23,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:57:23,233 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:57:23,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:57:23,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:57:23,234 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:57:23,234 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:57:23,235 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:57:23,235 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:57:23,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:57:23,235 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:57:23,236 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:57:23,236 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:57:23,236 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_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7dfc9f1e1cbceb1807370dcac22a0449d857eff9a54bdefbc84178983a910e84 [2021-11-23 02:57:23,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:57:23,529 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:57:23,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:57:23,534 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:57:23,535 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:57:23,536 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/bitvector/byte_add-1.i [2021-11-23 02:57:23,597 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/data/4410a0687/25893ca674b842eca5ea465eb09c6c12/FLAG57c396227 [2021-11-23 02:57:24,157 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:57:24,158 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/sv-benchmarks/c/bitvector/byte_add-1.i [2021-11-23 02:57:24,173 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/data/4410a0687/25893ca674b842eca5ea465eb09c6c12/FLAG57c396227 [2021-11-23 02:57:24,505 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/data/4410a0687/25893ca674b842eca5ea465eb09c6c12 [2021-11-23 02:57:24,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:57:24,513 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:57:24,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:57:24,517 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:57:24,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:57:24,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:57:24" (1/1) ... [2021-11-23 02:57:24,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a08071b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:24, skipping insertion in model container [2021-11-23 02:57:24,525 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:57:24" (1/1) ... [2021-11-23 02:57:24,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:57:24,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:57:24,804 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_5e4acdb4-deb2-4528-9e26-6508d3896dde/sv-benchmarks/c/bitvector/byte_add-1.i[1166,1179] [2021-11-23 02:57:24,874 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:57:24,884 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:57:24,906 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_5e4acdb4-deb2-4528-9e26-6508d3896dde/sv-benchmarks/c/bitvector/byte_add-1.i[1166,1179] [2021-11-23 02:57:24,949 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:57:24,968 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:57:24,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:24 WrapperNode [2021-11-23 02:57:24,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:57:24,970 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:57:24,971 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:57:24,971 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:57:24,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:24" (1/1) ... [2021-11-23 02:57:24,998 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:24" (1/1) ... [2021-11-23 02:57:25,039 INFO L137 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 124 [2021-11-23 02:57:25,040 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:57:25,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:57:25,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:57:25,042 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:57:25,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:24" (1/1) ... [2021-11-23 02:57:25,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:24" (1/1) ... [2021-11-23 02:57:25,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:24" (1/1) ... [2021-11-23 02:57:25,064 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:24" (1/1) ... [2021-11-23 02:57:25,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:24" (1/1) ... [2021-11-23 02:57:25,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:24" (1/1) ... [2021-11-23 02:57:25,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:24" (1/1) ... [2021-11-23 02:57:25,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:57:25,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:57:25,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:57:25,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:57:25,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:24" (1/1) ... [2021-11-23 02:57:25,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:57:25,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:57:25,127 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:57:25,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:57:25,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:57:25,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:57:25,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:57:25,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:57:25,244 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:57:25,246 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:57:25,514 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:57:25,802 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:57:25,802 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 02:57:25,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:57:25 BoogieIcfgContainer [2021-11-23 02:57:25,805 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:57:25,806 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:57:25,806 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:57:25,812 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:57:25,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:57:24" (1/3) ... [2021-11-23 02:57:25,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc6d030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:57:25, skipping insertion in model container [2021-11-23 02:57:25,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:24" (2/3) ... [2021-11-23 02:57:25,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc6d030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:57:25, skipping insertion in model container [2021-11-23 02:57:25,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:57:25" (3/3) ... [2021-11-23 02:57:25,816 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add-1.i [2021-11-23 02:57:25,821 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:57:25,822 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:57:25,870 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:57:25,876 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:57:25,876 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:57:25,889 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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) [2021-11-23 02:57:25,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 02:57:25,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:57:25,894 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 02:57:25,894 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:57:25,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:57:25,899 INFO L85 PathProgramCache]: Analyzing trace with hash 266780483, now seen corresponding path program 1 times [2021-11-23 02:57:25,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:57:25,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035544760] [2021-11-23 02:57:25,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:25,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:57:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:26,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:26,251 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:57:26,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035544760] [2021-11-23 02:57:26,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035544760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:57:26,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:57:26,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:57:26,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554455440] [2021-11-23 02:57:26,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:57:26,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:57:26,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:57:26,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:57:26,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:57:26,319 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:57:26,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:57:26,361 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2021-11-23 02:57:26,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:57:26,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 [2021-11-23 02:57:26,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:57:26,371 INFO L225 Difference]: With dead ends: 15 [2021-11-23 02:57:26,371 INFO L226 Difference]: Without dead ends: 8 [2021-11-23 02:57:26,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:57:26,377 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:57:26,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:57:26,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-23 02:57:26,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-23 02:57:26,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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) [2021-11-23 02:57:26,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2021-11-23 02:57:26,410 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2021-11-23 02:57:26,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:57:26,410 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2021-11-23 02:57:26,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:57:26,411 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2021-11-23 02:57:26,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 02:57:26,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:57:26,411 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 02:57:26,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:57:26,412 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:57:26,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:57:26,413 INFO L85 PathProgramCache]: Analyzing trace with hash -272821552, now seen corresponding path program 1 times [2021-11-23 02:57:26,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:57:26,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611434848] [2021-11-23 02:57:26,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:26,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:57:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:26,603 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:57:26,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611434848] [2021-11-23 02:57:26,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611434848] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:57:26,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343514472] [2021-11-23 02:57:26,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:26,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:57:26,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:57:26,615 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:57:26,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:57:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:26,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:57:26,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:26,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:26,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:26,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343514472] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:57:26,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1475043190] [2021-11-23 02:57:26,975 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-23 02:57:26,976 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:57:26,984 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:57:26,990 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:57:26,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:57:31,174 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:57:31,454 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '84#(and (<= 1 |ULTIMATE.start_mp_add_~na~0#1|) (<= |ULTIMATE.start_mp_add_~na~0#1| 4) (= (mod |ULTIMATE.start_mp_add_~carry~0#1| 65536) 0) (<= 1 |ULTIMATE.start_mp_add_~nb~0#1|) (<= 0 |ULTIMATE.start_mp_add_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_mp_add_~nb~0#1| 4) (= |ULTIMATE.start_main_~r~1#1| |ULTIMATE.start_mp_add_#res#1|) (= (ite (= (mod (+ |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|) 4294967296) (mod |ULTIMATE.start_main_~r~1#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 4 (mod |ULTIMATE.start_mp_add_~i~0#1| 256)) (<= 0 |ULTIMATE.start_mp_add_~carry~0#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_mp_add_~r~0#1| |ULTIMATE.start_mp_add_#res#1|) (= |#NULL.base| 0))' at error location [2021-11-23 02:57:31,454 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:57:31,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:57:31,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-23 02:57:31,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797669339] [2021-11-23 02:57:31,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:57:31,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:57:31,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:57:31,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:57:31,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:57:31,459 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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) [2021-11-23 02:57:31,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:57:31,572 INFO L93 Difference]: Finished difference Result 17 states and 24 transitions. [2021-11-23 02:57:31,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:57:31,574 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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) Word has length 6 [2021-11-23 02:57:31,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:57:31,574 INFO L225 Difference]: With dead ends: 17 [2021-11-23 02:57:31,574 INFO L226 Difference]: Without dead ends: 14 [2021-11-23 02:57:31,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:57:31,577 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:57:31,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:57:31,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-23 02:57:31,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-23 02:57:31,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 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) [2021-11-23 02:57:31,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2021-11-23 02:57:31,581 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 6 [2021-11-23 02:57:31,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:57:31,584 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2021-11-23 02:57:31,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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) [2021-11-23 02:57:31,584 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2021-11-23 02:57:31,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 02:57:31,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:57:31,586 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2021-11-23 02:57:31,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:57:31,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:57:31,802 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:57:31,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:57:31,803 INFO L85 PathProgramCache]: Analyzing trace with hash 2091235971, now seen corresponding path program 2 times [2021-11-23 02:57:31,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:57:31,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2806110] [2021-11-23 02:57:31,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:31,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:57:32,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:57:32,586 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 02:57:32,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:57:32,928 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 02:57:32,928 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 02:57:32,929 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 02:57:32,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:57:32,936 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1] [2021-11-23 02:57:32,939 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 02:57:33,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:57:33 BoogieIcfgContainer [2021-11-23 02:57:33,004 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 02:57:33,005 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 02:57:33,005 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 02:57:33,005 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 02:57:33,006 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:57:25" (3/4) ... [2021-11-23 02:57:33,009 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-23 02:57:33,010 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 02:57:33,011 INFO L158 Benchmark]: Toolchain (without parser) took 8497.10ms. Allocated memory was 111.1MB in the beginning and 201.3MB in the end (delta: 90.2MB). Free memory was 71.1MB in the beginning and 159.6MB in the end (delta: -88.5MB). Peak memory consumption was 2.7MB. Max. memory is 16.1GB. [2021-11-23 02:57:33,014 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 111.1MB. Free memory is still 87.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:57:33,020 INFO L158 Benchmark]: CACSL2BoogieTranslator took 452.73ms. Allocated memory is still 111.1MB. Free memory was 70.9MB in the beginning and 84.3MB in the end (delta: -13.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 02:57:33,021 INFO L158 Benchmark]: Boogie Procedure Inliner took 69.50ms. Allocated memory is still 111.1MB. Free memory was 84.3MB in the beginning and 82.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:57:33,022 INFO L158 Benchmark]: Boogie Preprocessor took 51.83ms. Allocated memory is still 111.1MB. Free memory was 82.5MB in the beginning and 81.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:57:33,022 INFO L158 Benchmark]: RCFGBuilder took 711.13ms. Allocated memory is still 111.1MB. Free memory was 81.1MB in the beginning and 56.7MB in the end (delta: 24.3MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-11-23 02:57:33,023 INFO L158 Benchmark]: TraceAbstraction took 7197.70ms. Allocated memory was 111.1MB in the beginning and 201.3MB in the end (delta: 90.2MB). Free memory was 56.2MB in the beginning and 160.6MB in the end (delta: -104.4MB). Peak memory consumption was 73.6MB. Max. memory is 16.1GB. [2021-11-23 02:57:33,025 INFO L158 Benchmark]: Witness Printer took 5.05ms. Allocated memory is still 201.3MB. Free memory was 160.6MB in the beginning and 159.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:57:33,028 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 111.1MB. Free memory is still 87.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 452.73ms. Allocated memory is still 111.1MB. Free memory was 70.9MB in the beginning and 84.3MB in the end (delta: -13.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 69.50ms. Allocated memory is still 111.1MB. Free memory was 84.3MB in the beginning and 82.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 51.83ms. Allocated memory is still 111.1MB. Free memory was 82.5MB in the beginning and 81.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 711.13ms. Allocated memory is still 111.1MB. Free memory was 81.1MB in the beginning and 56.7MB in the end (delta: 24.3MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 7197.70ms. Allocated memory was 111.1MB in the beginning and 201.3MB in the end (delta: 90.2MB). Free memory was 56.2MB in the beginning and 160.6MB in the end (delta: -104.4MB). Peak memory consumption was 73.6MB. Max. memory is 16.1GB. * Witness Printer took 5.05ms. Allocated memory is still 201.3MB. Free memory was 160.6MB in the beginning and 159.6MB in the end (delta: 1.1MB). 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 - UnprovableResult [Line: 25]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 116, overapproximation of bitwiseAnd at line 96. Possible FailurePath: [L124] unsigned int a, b, r; [L126] a = __VERIFIER_nondet_uint() [L127] b = __VERIFIER_nondet_uint() [L129] CALL, EXPR mp_add(a, b) [L42] unsigned char a0, a1, a2, a3; [L43] unsigned char b0, b1, b2, b3; [L44] unsigned char r0, r1, r2, r3; [L45] unsigned short carry; [L46] unsigned short partial_sum; [L47] unsigned int r; [L48] unsigned char i; [L49] unsigned char na, nb; [L50] a0 = a [L51] a1 = a >> 8 [L52] a2 = a >> 16U [L53] a3 = a >> 24U [L54] b0 = b [L55] b1 = b >> 8U [L56] b2 = b >> 16U [L57] b3 = b >> 24U [L58] na = (unsigned char)4 [L59] COND FALSE !(a3 == (unsigned char)0) [L68] nb = (unsigned char)4 [L69] COND TRUE b3 == (unsigned char)0 [L70] nb = nb - 1 [L71] COND TRUE b2 == (unsigned char)0 [L72] nb = nb - 1 [L73] COND FALSE !(b1 == (unsigned char)0) [L78] carry = (unsigned short)0 [L79] i = (unsigned char)0 VAL [\old(a)=4261347328, \old(b)=65024, a=4261347328, a0=4261347328, a1=16645888, a2=65023, a3=253, b=65024, b0=4295032320, b1=16777470, b2=65536, b3=256, carry=0, i=0, na=4, nb=2] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 [L83] COND TRUE i < na [L84] COND TRUE i == (unsigned char)0 [L84] partial_sum = partial_sum + a0 [L85] COND FALSE !(i == (unsigned char)1) [L86] COND FALSE !(i == (unsigned char)2) [L87] COND FALSE !(i == (unsigned char)3) [L89] COND TRUE i < nb [L90] COND TRUE i == (unsigned char)0 [L90] partial_sum = partial_sum + b0 [L91] COND FALSE !(i == (unsigned char)1) [L92] COND FALSE !(i == (unsigned char)2) [L93] COND FALSE !(i == (unsigned char)3) [L95] COND FALSE !(partial_sum > ((unsigned char)254)) [L99] COND TRUE i == (unsigned char)0 [L99] r0 = (unsigned char)partial_sum [L100] COND FALSE !(i == (unsigned char)1) [L101] COND FALSE !(i == (unsigned char)2) [L102] COND FALSE !(i == (unsigned char)3) [L104] i = i + (unsigned char)1 VAL [\old(a)=4261347328, \old(b)=65024, a=4261347328, a0=4261347328, a1=16645888, a2=65023, a3=253, b=65024, b0=4295032320, b1=16777470, b2=65536, b3=256, carry=0, i=1, na=4, nb=2, partial_sum=0, r0=0, r1=0, r2=254, r3=254] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 [L83] COND TRUE i < na [L84] COND FALSE !(i == (unsigned char)0) [L85] COND TRUE i == (unsigned char)1 [L85] partial_sum = partial_sum + a1 [L86] COND FALSE !(i == (unsigned char)2) [L87] COND FALSE !(i == (unsigned char)3) [L89] COND TRUE i < nb [L90] COND FALSE !(i == (unsigned char)0) [L91] COND TRUE i == (unsigned char)1 [L91] partial_sum = partial_sum + b1 [L92] COND FALSE !(i == (unsigned char)2) [L93] COND FALSE !(i == (unsigned char)3) [L95] COND FALSE !(partial_sum > ((unsigned char)254)) [L99] COND FALSE !(i == (unsigned char)0) [L100] COND TRUE i == (unsigned char)1 [L100] r1 = (unsigned char)partial_sum [L101] COND FALSE !(i == (unsigned char)2) [L102] COND FALSE !(i == (unsigned char)3) [L104] i = i + (unsigned char)1 VAL [\old(a)=4261347328, \old(b)=65024, a=4261347328, a0=4261347328, a1=16645888, a2=65023, a3=253, b=65024, b0=4295032320, b1=16777470, b2=65536, b3=256, carry=0, i=2, na=4, nb=2, partial_sum=254, r0=0, r1=254, r2=254, r3=254] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 [L83] COND TRUE i < na [L84] COND FALSE !(i == (unsigned char)0) [L85] COND FALSE !(i == (unsigned char)1) [L86] COND TRUE i == (unsigned char)2 [L86] partial_sum = partial_sum + a2 [L87] COND FALSE !(i == (unsigned char)3) [L89] COND FALSE !(i < nb) [L95] COND TRUE partial_sum > ((unsigned char)254) [L96] partial_sum = partial_sum & ((unsigned char)255) [L97] carry = (unsigned short)1 [L99] COND FALSE !(i == (unsigned char)0) [L100] COND FALSE !(i == (unsigned char)1) [L101] COND TRUE i == (unsigned char)2 [L101] r2 = (unsigned char)partial_sum [L102] COND FALSE !(i == (unsigned char)3) [L104] i = i + (unsigned char)1 VAL [\old(a)=4261347328, \old(b)=65024, a=4261347328, a0=4261347328, a1=16645888, a2=65023, a3=253, b=65024, b0=4295032320, b1=16777470, b2=65536, b3=256, carry=1, i=3, na=4, nb=2, partial_sum=0, r0=0, r1=254, r2=0, r3=254] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 [L83] COND TRUE i < na [L84] COND FALSE !(i == (unsigned char)0) [L85] COND FALSE !(i == (unsigned char)1) [L86] COND FALSE !(i == (unsigned char)2) [L87] COND TRUE i == (unsigned char)3 [L87] partial_sum = partial_sum + a3 [L89] COND FALSE !(i < nb) [L95] COND FALSE !(partial_sum > ((unsigned char)254)) [L99] COND FALSE !(i == (unsigned char)0) [L100] COND FALSE !(i == (unsigned char)1) [L101] COND FALSE !(i == (unsigned char)2) [L102] COND TRUE i == (unsigned char)3 [L102] r3 = (unsigned char)partial_sum [L104] i = i + (unsigned char)1 VAL [\old(a)=4261347328, \old(b)=65024, a=4261347328, a0=4261347328, a1=16645888, a2=65023, a3=253, b=65024, b0=4295032320, b1=16777470, b2=65536, b3=256, carry=0, i=4, na=4, nb=2, partial_sum=254, r0=0, r1=254, r2=0, r3=254] [L80] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) VAL [\old(a)=4261347328, \old(b)=65024, a=4261347328, a0=4261347328, a1=16645888, a2=65023, a3=253, b=65024, b0=4295032320, b1=16777470, b2=65536, b3=256, carry=0, i=4, na=4, nb=2, partial_sum=254, r0=0, r1=254, r2=0, r3=254] [L107] COND FALSE !(i < (unsigned char)4) [L116] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L118] return r; [L129] RET, EXPR mp_add(a, b) [L129] r = mp_add(a, b) [L131] CALL __VERIFIER_assert(r == a + b) [L24] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L25] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 8 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.1s, OverallIterations: 3, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4 mSDsluCounter, 14 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 10 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 40 IncrementalHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 5 mSDtfsCounter, 40 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=2, InterpolantAutomatonStates: 9, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 19 ConstructedInterpolants, 0 QuantifiedInterpolants, 137 SizeOfPredicates, 1 NumberOfNonLiveVariables, 77 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 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 [2021-11-23 02:57:33,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally 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_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7dfc9f1e1cbceb1807370dcac22a0449d857eff9a54bdefbc84178983a910e84 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:57:35,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:57:35,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:57:35,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:57:35,647 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:57:35,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:57:35,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:57:35,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:57:35,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:57:35,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:57:35,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:57:35,676 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:57:35,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:57:35,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:57:35,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:57:35,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:57:35,690 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:57:35,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:57:35,693 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:57:35,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:57:35,705 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:57:35,706 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:57:35,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:57:35,711 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:57:35,715 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:57:35,716 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:57:35,716 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:57:35,718 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:57:35,719 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:57:35,720 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:57:35,720 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:57:35,721 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:57:35,723 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:57:35,724 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:57:35,726 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:57:35,726 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:57:35,727 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:57:35,727 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:57:35,746 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:57:35,747 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:57:35,748 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:57:35,753 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 02:57:35,798 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:57:35,798 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:57:35,799 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:57:35,799 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:57:35,800 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:57:35,800 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:57:35,800 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:57:35,801 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:57:35,801 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:57:35,801 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:57:35,802 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:57:35,803 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:57:35,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:57:35,805 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:57:35,805 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:57:35,805 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:57:35,806 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:57:35,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:57:35,806 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:57:35,806 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:57:35,806 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 02:57:35,807 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 02:57:35,807 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:57:35,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:57:35,807 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:57:35,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:57:35,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:57:35,808 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 02:57:35,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:57:35,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:57:35,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:57:35,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:57:35,810 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:57:35,810 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 02:57:35,810 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 02:57:35,810 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:57:35,810 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:57:35,811 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:57:35,811 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_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7dfc9f1e1cbceb1807370dcac22a0449d857eff9a54bdefbc84178983a910e84 [2021-11-23 02:57:36,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:57:36,212 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:57:36,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:57:36,218 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:57:36,219 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:57:36,221 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/bitvector/byte_add-1.i [2021-11-23 02:57:36,307 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/data/38cdb2f4e/827c84b0bffe45ea83c47f5fa3512107/FLAGadffa2762 [2021-11-23 02:57:36,831 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:57:36,831 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/sv-benchmarks/c/bitvector/byte_add-1.i [2021-11-23 02:57:36,845 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/data/38cdb2f4e/827c84b0bffe45ea83c47f5fa3512107/FLAGadffa2762 [2021-11-23 02:57:37,163 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/data/38cdb2f4e/827c84b0bffe45ea83c47f5fa3512107 [2021-11-23 02:57:37,165 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:57:37,166 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:57:37,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:57:37,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:57:37,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:57:37,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:57:37" (1/1) ... [2021-11-23 02:57:37,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64731e43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:37, skipping insertion in model container [2021-11-23 02:57:37,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:57:37" (1/1) ... [2021-11-23 02:57:37,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:57:37,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:57:37,380 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_5e4acdb4-deb2-4528-9e26-6508d3896dde/sv-benchmarks/c/bitvector/byte_add-1.i[1166,1179] [2021-11-23 02:57:37,417 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:57:37,432 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:57:37,464 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_5e4acdb4-deb2-4528-9e26-6508d3896dde/sv-benchmarks/c/bitvector/byte_add-1.i[1166,1179] [2021-11-23 02:57:37,506 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:57:37,534 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:57:37,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:37 WrapperNode [2021-11-23 02:57:37,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:57:37,536 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:57:37,536 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:57:37,537 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:57:37,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:37" (1/1) ... [2021-11-23 02:57:37,553 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:37" (1/1) ... [2021-11-23 02:57:37,579 INFO L137 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 124 [2021-11-23 02:57:37,582 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:57:37,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:57:37,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:57:37,585 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:57:37,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:37" (1/1) ... [2021-11-23 02:57:37,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:37" (1/1) ... [2021-11-23 02:57:37,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:37" (1/1) ... [2021-11-23 02:57:37,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:37" (1/1) ... [2021-11-23 02:57:37,621 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:37" (1/1) ... [2021-11-23 02:57:37,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:37" (1/1) ... [2021-11-23 02:57:37,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:37" (1/1) ... [2021-11-23 02:57:37,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:57:37,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:57:37,649 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:57:37,649 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:57:37,650 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:37" (1/1) ... [2021-11-23 02:57:37,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:57:37,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:57:37,690 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:57:37,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:57:37,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:57:37,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 02:57:37,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:57:37,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:57:37,836 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:57:37,838 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:57:38,138 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:57:38,144 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:57:38,157 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 02:57:38,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:57:38 BoogieIcfgContainer [2021-11-23 02:57:38,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:57:38,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:57:38,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:57:38,166 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:57:38,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:57:37" (1/3) ... [2021-11-23 02:57:38,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58fa6b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:57:38, skipping insertion in model container [2021-11-23 02:57:38,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:37" (2/3) ... [2021-11-23 02:57:38,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58fa6b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:57:38, skipping insertion in model container [2021-11-23 02:57:38,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:57:38" (3/3) ... [2021-11-23 02:57:38,169 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add-1.i [2021-11-23 02:57:38,175 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:57:38,175 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:57:38,231 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:57:38,238 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:57:38,238 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:57:38,274 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:57:38,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 02:57:38,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:57:38,282 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:57:38,284 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:57:38,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:57:38,294 INFO L85 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2021-11-23 02:57:38,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:57:38,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1157549484] [2021-11-23 02:57:38,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:38,307 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:57:38,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:57:38,311 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:57:38,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 02:57:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:38,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 02:57:38,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:38,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:38,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:38,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:38,456 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:57:38,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1157549484] [2021-11-23 02:57:38,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1157549484] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:57:38,457 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:57:38,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 02:57:38,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597396803] [2021-11-23 02:57:38,460 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:57:38,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 02:57:38,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:57:38,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 02:57:38,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:57:38,495 INFO L87 Difference]: Start difference. First operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 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 6.0) internal successors, (12), 2 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) [2021-11-23 02:57:38,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:57:38,513 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2021-11-23 02:57:38,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 02:57:38,516 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12 [2021-11-23 02:57:38,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:57:38,525 INFO L225 Difference]: With dead ends: 57 [2021-11-23 02:57:38,525 INFO L226 Difference]: Without dead ends: 38 [2021-11-23 02:57:38,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:57:38,532 INFO L933 BasicCegarLoop]: 68 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, 68 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 [2021-11-23 02:57:38,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:57:38,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-23 02:57:38,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-23 02:57:38,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:57:38,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2021-11-23 02:57:38,569 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2021-11-23 02:57:38,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:57:38,570 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2021-11-23 02:57:38,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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) [2021-11-23 02:57:38,571 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2021-11-23 02:57:38,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 02:57:38,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:57:38,572 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:57:38,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:57:38,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:57:38,785 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:57:38,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:57:38,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2021-11-23 02:57:38,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:57:38,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [948115537] [2021-11-23 02:57:38,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:38,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:57:38,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:57:38,795 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:57:38,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 02:57:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:38,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:57:38,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:38,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:39,040 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:57:39,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [948115537] [2021-11-23 02:57:39,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [948115537] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:57:39,041 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:57:39,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 02:57:39,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648559768] [2021-11-23 02:57:39,042 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:57:39,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:57:39,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:57:39,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:57:39,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:57:39,045 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-11-23 02:57:39,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:57:39,510 INFO L93 Difference]: Finished difference Result 172 states and 301 transitions. [2021-11-23 02:57:39,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:57:39,514 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 12 [2021-11-23 02:57:39,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:57:39,521 INFO L225 Difference]: With dead ends: 172 [2021-11-23 02:57:39,521 INFO L226 Difference]: Without dead ends: 144 [2021-11-23 02:57:39,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:57:39,525 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 226 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:57:39,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 170 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:57:39,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-23 02:57:39,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 112. [2021-11-23 02:57:39,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.6486486486486487) internal successors, (183), 111 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:57:39,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 183 transitions. [2021-11-23 02:57:39,562 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 183 transitions. Word has length 12 [2021-11-23 02:57:39,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:57:39,563 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 183 transitions. [2021-11-23 02:57:39,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-11-23 02:57:39,564 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 183 transitions. [2021-11-23 02:57:39,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 02:57:39,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:57:39,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:57:39,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:57:39,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:57:39,786 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:57:39,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:57:39,786 INFO L85 PathProgramCache]: Analyzing trace with hash 583572890, now seen corresponding path program 1 times [2021-11-23 02:57:39,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:57:39,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001748314] [2021-11-23 02:57:39,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:39,788 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:57:39,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:57:39,789 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:57:39,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 02:57:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:39,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:57:39,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:39,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:40,002 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:57:40,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001748314] [2021-11-23 02:57:40,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001748314] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:57:40,003 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:57:40,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-23 02:57:40,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361603315] [2021-11-23 02:57:40,003 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:57:40,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:57:40,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:57:40,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:57:40,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:57:40,005 INFO L87 Difference]: Start difference. First operand 112 states and 183 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:57:40,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:57:40,845 INFO L93 Difference]: Finished difference Result 345 states and 594 transitions. [2021-11-23 02:57:40,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 02:57:40,846 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 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 14 [2021-11-23 02:57:40,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:57:40,848 INFO L225 Difference]: With dead ends: 345 [2021-11-23 02:57:40,848 INFO L226 Difference]: Without dead ends: 300 [2021-11-23 02:57:40,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:57:40,851 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 925 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:57:40,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [925 Valid, 228 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 02:57:40,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-11-23 02:57:40,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 225. [2021-11-23 02:57:40,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.6383928571428572) internal successors, (367), 224 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:57:40,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 367 transitions. [2021-11-23 02:57:40,900 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 367 transitions. Word has length 14 [2021-11-23 02:57:40,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:57:40,900 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 367 transitions. [2021-11-23 02:57:40,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:57:40,901 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 367 transitions. [2021-11-23 02:57:40,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 02:57:40,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:57:40,903 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:57:40,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:57:41,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:57:41,116 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:57:41,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:57:41,117 INFO L85 PathProgramCache]: Analyzing trace with hash -842586557, now seen corresponding path program 1 times [2021-11-23 02:57:41,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:57:41,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071799723] [2021-11-23 02:57:41,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:41,118 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:57:41,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:57:41,119 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:57:41,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 02:57:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:41,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:57:41,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:41,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:41,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:41,356 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:57:41,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2071799723] [2021-11-23 02:57:41,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2071799723] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:57:41,357 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:57:41,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 02:57:41,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736353627] [2021-11-23 02:57:41,357 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:57:41,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:57:41,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:57:41,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:57:41,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:57:41,359 INFO L87 Difference]: Start difference. First operand 225 states and 367 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 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) [2021-11-23 02:57:41,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:57:41,677 INFO L93 Difference]: Finished difference Result 1018 states and 1671 transitions. [2021-11-23 02:57:41,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:57:41,677 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 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 26 [2021-11-23 02:57:41,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:57:41,682 INFO L225 Difference]: With dead ends: 1018 [2021-11-23 02:57:41,683 INFO L226 Difference]: Without dead ends: 818 [2021-11-23 02:57:41,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:57:41,686 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 209 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:57:41,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 187 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:57:41,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-11-23 02:57:41,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 467. [2021-11-23 02:57:41,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 1.53862660944206) internal successors, (717), 466 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:57:41,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 717 transitions. [2021-11-23 02:57:41,738 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 717 transitions. Word has length 26 [2021-11-23 02:57:41,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:57:41,739 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 717 transitions. [2021-11-23 02:57:41,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 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) [2021-11-23 02:57:41,740 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 717 transitions. [2021-11-23 02:57:41,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 02:57:41,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:57:41,747 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:57:41,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:57:41,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:57:41,962 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:57:41,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:57:41,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1924928046, now seen corresponding path program 1 times [2021-11-23 02:57:41,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:57:41,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335292634] [2021-11-23 02:57:41,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:41,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:57:41,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:57:41,968 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:57:41,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 02:57:42,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:42,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:57:42,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:42,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:42,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:42,392 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:57:42,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335292634] [2021-11-23 02:57:42,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [335292634] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:57:42,393 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:57:42,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-23 02:57:42,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365529323] [2021-11-23 02:57:42,393 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:57:42,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 02:57:42,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:57:42,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 02:57:42,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:57:42,395 INFO L87 Difference]: Start difference. First operand 467 states and 717 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:57:43,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:57:43,009 INFO L93 Difference]: Finished difference Result 1528 states and 2404 transitions. [2021-11-23 02:57:43,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 02:57:43,010 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 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 28 [2021-11-23 02:57:43,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:57:43,017 INFO L225 Difference]: With dead ends: 1528 [2021-11-23 02:57:43,017 INFO L226 Difference]: Without dead ends: 1086 [2021-11-23 02:57:43,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-11-23 02:57:43,020 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 438 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:57:43,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 615 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 705 Invalid, 0 Unknown, 123 Unchecked, 0.5s Time] [2021-11-23 02:57:43,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-11-23 02:57:43,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 490. [2021-11-23 02:57:43,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 1.4969325153374233) internal successors, (732), 489 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:57:43,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 732 transitions. [2021-11-23 02:57:43,046 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 732 transitions. Word has length 28 [2021-11-23 02:57:43,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:57:43,047 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 732 transitions. [2021-11-23 02:57:43,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:57:43,047 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 732 transitions. [2021-11-23 02:57:43,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 02:57:43,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:57:43,049 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:57:43,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:57:43,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:57:43,261 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:57:43,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:57:43,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1604924270, now seen corresponding path program 1 times [2021-11-23 02:57:43,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:57:43,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [344653681] [2021-11-23 02:57:43,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:43,262 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:57:43,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:57:43,263 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:57:43,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 02:57:43,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:43,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:57:43,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:43,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:43,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:43,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:43,492 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:57:43,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [344653681] [2021-11-23 02:57:43,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [344653681] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:57:43,493 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:57:43,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-23 02:57:43,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839006351] [2021-11-23 02:57:43,494 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:57:43,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 02:57:43,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:57:43,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 02:57:43,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:57:43,496 INFO L87 Difference]: Start difference. First operand 490 states and 732 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:57:44,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:57:44,046 INFO L93 Difference]: Finished difference Result 1425 states and 2205 transitions. [2021-11-23 02:57:44,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 02:57:44,046 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 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 28 [2021-11-23 02:57:44,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:57:44,053 INFO L225 Difference]: With dead ends: 1425 [2021-11-23 02:57:44,054 INFO L226 Difference]: Without dead ends: 1197 [2021-11-23 02:57:44,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-11-23 02:57:44,060 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 1098 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1098 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:57:44,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1098 Valid, 407 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:57:44,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-11-23 02:57:44,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 954. [2021-11-23 02:57:44,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 1.459601259181532) internal successors, (1391), 953 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:57:44,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1391 transitions. [2021-11-23 02:57:44,113 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1391 transitions. Word has length 28 [2021-11-23 02:57:44,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:57:44,113 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 1391 transitions. [2021-11-23 02:57:44,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:57:44,114 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1391 transitions. [2021-11-23 02:57:44,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 02:57:44,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:57:44,116 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:57:44,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:57:44,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:57:44,332 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:57:44,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:57:44,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1970910225, now seen corresponding path program 1 times [2021-11-23 02:57:44,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:57:44,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335116270] [2021-11-23 02:57:44,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:44,333 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:57:44,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:57:44,334 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:57:44,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 02:57:44,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:44,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:57:44,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:44,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:44,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:44,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:44,504 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:57:44,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335116270] [2021-11-23 02:57:44,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [335116270] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:57:44,504 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:57:44,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-23 02:57:44,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665333308] [2021-11-23 02:57:44,505 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:57:44,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:57:44,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:57:44,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:57:44,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:57:44,507 INFO L87 Difference]: Start difference. First operand 954 states and 1391 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:57:44,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:57:44,644 INFO L93 Difference]: Finished difference Result 2054 states and 2999 transitions. [2021-11-23 02:57:44,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:57:44,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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 31 [2021-11-23 02:57:44,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:57:44,652 INFO L225 Difference]: With dead ends: 2054 [2021-11-23 02:57:44,652 INFO L226 Difference]: Without dead ends: 1211 [2021-11-23 02:57:44,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:57:44,654 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 39 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:57:44,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 64 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:57:44,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2021-11-23 02:57:44,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 1077. [2021-11-23 02:57:44,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1076 states have (on average 1.3986988847583643) internal successors, (1505), 1076 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:57:44,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 1505 transitions. [2021-11-23 02:57:44,699 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 1505 transitions. Word has length 31 [2021-11-23 02:57:44,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:57:44,700 INFO L470 AbstractCegarLoop]: Abstraction has 1077 states and 1505 transitions. [2021-11-23 02:57:44,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:57:44,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 1505 transitions. [2021-11-23 02:57:44,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 02:57:44,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:57:44,702 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:57:44,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:57:44,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:57:44,916 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:57:44,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:57:44,917 INFO L85 PathProgramCache]: Analyzing trace with hash 2075339537, now seen corresponding path program 1 times [2021-11-23 02:57:44,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:57:44,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278557417] [2021-11-23 02:57:44,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:44,918 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:57:44,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:57:44,919 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:57:44,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 02:57:44,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:44,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:57:44,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:45,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:45,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:45,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:45,255 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:57:45,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278557417] [2021-11-23 02:57:45,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278557417] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:57:45,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [775810828] [2021-11-23 02:57:45,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:45,256 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:57:45,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:57:45,262 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:57:45,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 02:57:45,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:45,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:57:45,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:45,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:45,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:45,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [775810828] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:57:45,435 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:57:45,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 12 [2021-11-23 02:57:45,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802735108] [2021-11-23 02:57:45,436 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:57:45,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:57:45,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:57:45,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:57:45,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:57:45,438 INFO L87 Difference]: Start difference. First operand 1077 states and 1505 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:57:45,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:57:45,475 INFO L93 Difference]: Finished difference Result 1513 states and 2098 transitions. [2021-11-23 02:57:45,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:57:45,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 31 [2021-11-23 02:57:45,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:57:45,484 INFO L225 Difference]: With dead ends: 1513 [2021-11-23 02:57:45,484 INFO L226 Difference]: Without dead ends: 1386 [2021-11-23 02:57:45,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:57:45,486 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 4 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:57:45,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 182 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:57:45,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2021-11-23 02:57:45,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1316. [2021-11-23 02:57:45,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1316 states, 1315 states have (on average 1.3863117870722435) internal successors, (1823), 1315 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:57:45,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 1823 transitions. [2021-11-23 02:57:45,546 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 1823 transitions. Word has length 31 [2021-11-23 02:57:45,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:57:45,547 INFO L470 AbstractCegarLoop]: Abstraction has 1316 states and 1823 transitions. [2021-11-23 02:57:45,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:57:45,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 1823 transitions. [2021-11-23 02:57:45,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 02:57:45,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:57:45,549 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:57:45,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:57:45,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:57:45,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:57:45,960 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:57:45,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:57:45,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1961462321, now seen corresponding path program 1 times [2021-11-23 02:57:45,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:57:45,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858003374] [2021-11-23 02:57:45,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:45,961 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:57:45,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:57:45,962 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:57:45,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 02:57:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:45,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:57:45,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:46,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:46,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:46,252 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:57:46,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858003374] [2021-11-23 02:57:46,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858003374] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:57:46,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [456965338] [2021-11-23 02:57:46,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:46,253 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:57:46,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:57:46,253 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:57:46,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 02:57:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:46,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:57:46,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:46,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:46,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [456965338] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:57:46,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15744244] [2021-11-23 02:57:46,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:46,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:57:46,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:57:46,563 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:57:46,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 02:57:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:46,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:57:46,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:46,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:46,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:46,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15744244] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:57:46,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:57:46,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 4, 4] total 14 [2021-11-23 02:57:46,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891164624] [2021-11-23 02:57:46,778 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:57:46,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 02:57:46,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:57:46,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 02:57:46,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:57:46,780 INFO L87 Difference]: Start difference. First operand 1316 states and 1823 transitions. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:57:48,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:57:48,667 INFO L93 Difference]: Finished difference Result 5723 states and 8338 transitions. [2021-11-23 02:57:48,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-23 02:57:48,668 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 14 states have internal predecessors, (96), 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 31 [2021-11-23 02:57:48,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:57:48,695 INFO L225 Difference]: With dead ends: 5723 [2021-11-23 02:57:48,695 INFO L226 Difference]: Without dead ends: 4370 [2021-11-23 02:57:48,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=456, Invalid=1104, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 02:57:48,700 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 997 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 1518 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 1758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 1518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:57:48,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [997 Valid, 312 Invalid, 1758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 1518 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 02:57:48,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4370 states. [2021-11-23 02:57:48,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4370 to 2707. [2021-11-23 02:57:48,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2707 states, 2706 states have (on average 1.3869179600886918) internal successors, (3753), 2706 states have internal predecessors, (3753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:57:48,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2707 states to 2707 states and 3753 transitions. [2021-11-23 02:57:48,834 INFO L78 Accepts]: Start accepts. Automaton has 2707 states and 3753 transitions. Word has length 31 [2021-11-23 02:57:48,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:57:48,834 INFO L470 AbstractCegarLoop]: Abstraction has 2707 states and 3753 transitions. [2021-11-23 02:57:48,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:57:48,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2707 states and 3753 transitions. [2021-11-23 02:57:48,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-23 02:57:48,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:57:48,839 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:57:48,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:57:49,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-23 02:57:49,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:57:49,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:57:49,442 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:57:49,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:57:49,443 INFO L85 PathProgramCache]: Analyzing trace with hash 170049128, now seen corresponding path program 1 times [2021-11-23 02:57:49,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:57:49,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961017373] [2021-11-23 02:57:49,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:49,444 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:57:49,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:57:49,444 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:57:49,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 02:57:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:49,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:57:49,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:57:49,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:49,944 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:57:49,944 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:57:49,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961017373] [2021-11-23 02:57:49,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961017373] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:57:49,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:57:49,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-23 02:57:49,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277506443] [2021-11-23 02:57:49,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:57:49,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:57:49,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:57:49,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:57:49,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:57:49,947 INFO L87 Difference]: Start difference. First operand 2707 states and 3753 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:57:50,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:57:50,049 INFO L93 Difference]: Finished difference Result 3458 states and 4763 transitions. [2021-11-23 02:57:50,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:57:50,049 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 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 50 [2021-11-23 02:57:50,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:57:50,070 INFO L225 Difference]: With dead ends: 3458 [2021-11-23 02:57:50,071 INFO L226 Difference]: Without dead ends: 3430 [2021-11-23 02:57:50,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:57:50,073 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 79 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:57:50,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 235 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2021-11-23 02:57:50,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3430 states. [2021-11-23 02:57:50,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3430 to 2716. [2021-11-23 02:57:50,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2715 states have (on average 1.3860036832412523) internal successors, (3763), 2715 states have internal predecessors, (3763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:57:50,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 3763 transitions. [2021-11-23 02:57:50,193 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 3763 transitions. Word has length 50 [2021-11-23 02:57:50,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:57:50,195 INFO L470 AbstractCegarLoop]: Abstraction has 2716 states and 3763 transitions. [2021-11-23 02:57:50,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:57:50,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 3763 transitions. [2021-11-23 02:57:50,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 02:57:50,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:57:50,200 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:57:50,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 02:57:50,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:57:50,411 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:57:50,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:57:50,411 INFO L85 PathProgramCache]: Analyzing trace with hash 945650591, now seen corresponding path program 1 times [2021-11-23 02:57:50,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:57:50,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1215334627] [2021-11-23 02:57:50,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:50,412 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:57:50,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:57:50,413 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:57:50,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 02:57:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:50,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 02:57:50,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:57:53,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:55,189 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:57:55,189 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:57:55,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1215334627] [2021-11-23 02:57:55,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1215334627] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:57:55,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [628365250] [2021-11-23 02:57:55,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:55,190 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:57:55,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:57:55,202 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:57:55,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-23 02:57:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:55,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-23 02:57:55,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:57,270 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:57:57,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:58,046 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:57:58,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [628365250] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:57:58,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089425] [2021-11-23 02:57:58,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:58,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:57:58,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:57:58,048 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:57:58,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 02:57:58,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:58,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 02:57:58,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:57:59,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:58:00,103 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:58:00,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089425] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:58:00,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:58:00,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20, 20, 20, 20] total 44 [2021-11-23 02:58:00,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398057391] [2021-11-23 02:58:00,112 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:58:00,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-23 02:58:00,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:58:00,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-23 02:58:00,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1694, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 02:58:00,116 INFO L87 Difference]: Start difference. First operand 2716 states and 3763 transitions. Second operand has 44 states, 44 states have (on average 2.772727272727273) internal successors, (122), 44 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:58:27,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:58:27,011 INFO L93 Difference]: Finished difference Result 5546 states and 7555 transitions. [2021-11-23 02:58:27,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-23 02:58:27,012 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.772727272727273) internal successors, (122), 44 states have internal predecessors, (122), 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 51 [2021-11-23 02:58:27,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:58:27,038 INFO L225 Difference]: With dead ends: 5546 [2021-11-23 02:58:27,039 INFO L226 Difference]: Without dead ends: 5128 [2021-11-23 02:58:27,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3771 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=3761, Invalid=12751, Unknown=0, NotChecked=0, Total=16512 [2021-11-23 02:58:27,047 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 1872 mSDsluCounter, 4483 mSDsCounter, 0 mSdLazyCounter, 9192 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1872 SdHoareTripleChecker+Valid, 4730 SdHoareTripleChecker+Invalid, 9486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 9192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:58:27,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1872 Valid, 4730 Invalid, 9486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 9192 Invalid, 0 Unknown, 0 Unchecked, 11.3s Time] [2021-11-23 02:58:27,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5128 states. [2021-11-23 02:58:27,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5128 to 3507. [2021-11-23 02:58:27,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3507 states, 3506 states have (on average 1.3739304050199659) internal successors, (4817), 3506 states have internal predecessors, (4817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:58:27,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3507 states to 3507 states and 4817 transitions. [2021-11-23 02:58:27,248 INFO L78 Accepts]: Start accepts. Automaton has 3507 states and 4817 transitions. Word has length 51 [2021-11-23 02:58:27,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:58:27,249 INFO L470 AbstractCegarLoop]: Abstraction has 3507 states and 4817 transitions. [2021-11-23 02:58:27,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.772727272727273) internal successors, (122), 44 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:58:27,249 INFO L276 IsEmpty]: Start isEmpty. Operand 3507 states and 4817 transitions. [2021-11-23 02:58:27,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 02:58:27,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:58:27,271 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:58:27,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 02:58:27,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 02:58:27,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-23 02:58:27,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:58:27,873 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:58:27,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:58:27,873 INFO L85 PathProgramCache]: Analyzing trace with hash -65466659, now seen corresponding path program 1 times [2021-11-23 02:58:27,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:58:27,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1191737576] [2021-11-23 02:58:27,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:58:27,874 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:58:27,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:58:27,876 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:58:27,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 02:58:27,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:58:27,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:58:27,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:58:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 02:58:28,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:58:28,147 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 02:58:28,147 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:58:28,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1191737576] [2021-11-23 02:58:28,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1191737576] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:58:28,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [912882870] [2021-11-23 02:58:28,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:58:28,148 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:58:28,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:58:28,157 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:58:28,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-23 02:58:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:58:28,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:58:28,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:58:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 02:58:28,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:58:28,454 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 02:58:28,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [912882870] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:58:28,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601287341] [2021-11-23 02:58:28,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:58:28,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:58:28,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:58:28,455 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:58:28,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 02:58:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:58:28,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:58:28,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:58:28,600 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 02:58:28,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:58:28,702 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 02:58:28,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601287341] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:58:28,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:58:28,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8, 5, 5, 4] total 12 [2021-11-23 02:58:28,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806637121] [2021-11-23 02:58:28,703 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:58:28,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 02:58:28,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:58:28,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 02:58:28,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:58:28,704 INFO L87 Difference]: Start difference. First operand 3507 states and 4817 transitions. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:58:29,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:58:29,117 INFO L93 Difference]: Finished difference Result 6449 states and 8805 transitions. [2021-11-23 02:58:29,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 02:58:29,117 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 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 51 [2021-11-23 02:58:29,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:58:29,138 INFO L225 Difference]: With dead ends: 6449 [2021-11-23 02:58:29,139 INFO L226 Difference]: Without dead ends: 4043 [2021-11-23 02:58:29,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 288 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-11-23 02:58:29,143 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 171 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:58:29,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 272 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 350 Invalid, 0 Unknown, 186 Unchecked, 0.2s Time] [2021-11-23 02:58:29,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4043 states. [2021-11-23 02:58:29,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4043 to 3526. [2021-11-23 02:58:29,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3526 states, 3525 states have (on average 1.3455319148936171) internal successors, (4743), 3525 states have internal predecessors, (4743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:58:29,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 4743 transitions. [2021-11-23 02:58:29,337 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 4743 transitions. Word has length 51 [2021-11-23 02:58:29,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:58:29,339 INFO L470 AbstractCegarLoop]: Abstraction has 3526 states and 4743 transitions. [2021-11-23 02:58:29,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:58:29,339 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 4743 transitions. [2021-11-23 02:58:29,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 02:58:29,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:58:29,344 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:58:29,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 02:58:29,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-23 02:58:29,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-23 02:58:29,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:58:29,956 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:58:29,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:58:29,957 INFO L85 PathProgramCache]: Analyzing trace with hash 592562209, now seen corresponding path program 1 times [2021-11-23 02:58:29,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:58:29,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576539568] [2021-11-23 02:58:29,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:58:29,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:58:29,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:58:29,959 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:58:29,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 02:58:29,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:58:30,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:58:30,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:58:30,185 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:58:30,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:58:30,414 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:58:30,415 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:58:30,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576539568] [2021-11-23 02:58:30,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576539568] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:58:30,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:58:30,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-23 02:58:30,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244379649] [2021-11-23 02:58:30,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:58:30,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:58:30,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:58:30,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:58:30,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:58:30,417 INFO L87 Difference]: Start difference. First operand 3526 states and 4743 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:58:30,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:58:30,587 INFO L93 Difference]: Finished difference Result 3783 states and 5039 transitions. [2021-11-23 02:58:30,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:58:30,587 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 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 51 [2021-11-23 02:58:30,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:58:30,618 INFO L225 Difference]: With dead ends: 3783 [2021-11-23 02:58:30,625 INFO L226 Difference]: Without dead ends: 3745 [2021-11-23 02:58:30,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:58:30,628 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 149 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:58:30,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 463 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 174 Unchecked, 0.1s Time] [2021-11-23 02:58:30,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3745 states. [2021-11-23 02:58:30,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3745 to 3535. [2021-11-23 02:58:30,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 3534 states have (on average 1.3449349179400114) internal successors, (4753), 3534 states have internal predecessors, (4753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:58:30,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 4753 transitions. [2021-11-23 02:58:30,788 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 4753 transitions. Word has length 51 [2021-11-23 02:58:30,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:58:30,789 INFO L470 AbstractCegarLoop]: Abstraction has 3535 states and 4753 transitions. [2021-11-23 02:58:30,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:58:30,790 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 4753 transitions. [2021-11-23 02:58:30,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 02:58:30,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:58:30,794 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:58:30,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-23 02:58:31,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:58:31,006 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:58:31,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:58:31,008 INFO L85 PathProgramCache]: Analyzing trace with hash -969851738, now seen corresponding path program 1 times [2021-11-23 02:58:31,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:58:31,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [851744060] [2021-11-23 02:58:31,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:58:31,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:58:31,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:58:31,010 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:58:31,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 02:58:31,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:58:31,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:58:31,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:58:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:58:31,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:58:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:58:31,462 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:58:31,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [851744060] [2021-11-23 02:58:31,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [851744060] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:58:31,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:58:31,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-23 02:58:31,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385406263] [2021-11-23 02:58:31,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:58:31,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:58:31,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:58:31,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:58:31,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:58:31,465 INFO L87 Difference]: Start difference. First operand 3535 states and 4753 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:58:31,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:58:31,708 INFO L93 Difference]: Finished difference Result 4367 states and 5864 transitions. [2021-11-23 02:58:31,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:58:31,709 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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 53 [2021-11-23 02:58:31,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:58:31,716 INFO L225 Difference]: With dead ends: 4367 [2021-11-23 02:58:31,716 INFO L226 Difference]: Without dead ends: 3615 [2021-11-23 02:58:31,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:58:31,721 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 115 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:58:31,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 292 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 101 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2021-11-23 02:58:31,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3615 states. [2021-11-23 02:58:31,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3615 to 3535. [2021-11-23 02:58:31,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 3534 states have (on average 1.3432371250707413) internal successors, (4747), 3534 states have internal predecessors, (4747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:58:31,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 4747 transitions. [2021-11-23 02:58:31,922 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 4747 transitions. Word has length 53 [2021-11-23 02:58:31,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:58:31,923 INFO L470 AbstractCegarLoop]: Abstraction has 3535 states and 4747 transitions. [2021-11-23 02:58:31,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:58:31,923 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 4747 transitions. [2021-11-23 02:58:31,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 02:58:31,928 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:58:31,928 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:58:31,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 02:58:32,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:58:32,141 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:58:32,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:58:32,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1950719985, now seen corresponding path program 1 times [2021-11-23 02:58:32,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:58:32,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917562586] [2021-11-23 02:58:32,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:58:32,143 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:58:32,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:58:32,144 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:58:32,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 02:58:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:58:32,198 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 02:58:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:58:32,297 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-23 02:58:32,309 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 02:58:32,311 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 02:58:32,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-23 02:58:32,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:58:32,517 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:58:32,520 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 02:58:32,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:58:32 BoogieIcfgContainer [2021-11-23 02:58:32,655 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 02:58:32,656 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 02:58:32,656 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 02:58:32,656 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 02:58:32,657 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:57:38" (3/4) ... [2021-11-23 02:58:32,659 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-23 02:58:32,769 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 02:58:32,769 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 02:58:32,769 INFO L158 Benchmark]: Toolchain (without parser) took 55603.30ms. Allocated memory was 77.6MB in the beginning and 180.4MB in the end (delta: 102.8MB). Free memory was 42.5MB in the beginning and 78.5MB in the end (delta: -36.0MB). Peak memory consumption was 67.7MB. Max. memory is 16.1GB. [2021-11-23 02:58:32,770 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 77.6MB. Free memory is still 58.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:58:32,770 INFO L158 Benchmark]: CACSL2BoogieTranslator took 354.25ms. Allocated memory is still 77.6MB. Free memory was 42.3MB in the beginning and 60.6MB in the end (delta: -18.4MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. [2021-11-23 02:58:32,771 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.05ms. Allocated memory is still 77.6MB. Free memory was 60.4MB in the beginning and 58.7MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:58:32,771 INFO L158 Benchmark]: Boogie Preprocessor took 64.85ms. Allocated memory is still 77.6MB. Free memory was 58.7MB in the beginning and 57.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:58:32,771 INFO L158 Benchmark]: RCFGBuilder took 511.06ms. Allocated memory is still 77.6MB. Free memory was 57.1MB in the beginning and 44.1MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 02:58:32,772 INFO L158 Benchmark]: TraceAbstraction took 54492.97ms. Allocated memory was 77.6MB in the beginning and 180.4MB in the end (delta: 102.8MB). Free memory was 43.7MB in the beginning and 84.8MB in the end (delta: -41.1MB). Peak memory consumption was 62.0MB. Max. memory is 16.1GB. [2021-11-23 02:58:32,772 INFO L158 Benchmark]: Witness Printer took 113.29ms. Allocated memory is still 180.4MB. Free memory was 84.8MB in the beginning and 78.5MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-23 02:58:32,774 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 77.6MB. Free memory is still 58.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 354.25ms. Allocated memory is still 77.6MB. Free memory was 42.3MB in the beginning and 60.6MB in the end (delta: -18.4MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.05ms. Allocated memory is still 77.6MB. Free memory was 60.4MB in the beginning and 58.7MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 64.85ms. Allocated memory is still 77.6MB. Free memory was 58.7MB in the beginning and 57.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 511.06ms. Allocated memory is still 77.6MB. Free memory was 57.1MB in the beginning and 44.1MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 54492.97ms. Allocated memory was 77.6MB in the beginning and 180.4MB in the end (delta: 102.8MB). Free memory was 43.7MB in the beginning and 84.8MB in the end (delta: -41.1MB). Peak memory consumption was 62.0MB. Max. memory is 16.1GB. * Witness Printer took 113.29ms. Allocated memory is still 180.4MB. Free memory was 84.8MB in the beginning and 78.5MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. 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 - CounterExampleResult [Line: 25]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L124] unsigned int a, b, r; [L126] a = __VERIFIER_nondet_uint() [L127] b = __VERIFIER_nondet_uint() [L129] CALL, EXPR mp_add(a, b) [L42] unsigned char a0, a1, a2, a3; [L43] unsigned char b0, b1, b2, b3; [L44] unsigned char r0, r1, r2, r3; [L45] unsigned short carry; [L46] unsigned short partial_sum; [L47] unsigned int r; [L48] unsigned char i; [L49] unsigned char na, nb; [L50] a0 = a [L51] a1 = a >> 8 [L52] a2 = a >> 16U [L53] a3 = a >> 24U [L54] b0 = b [L55] b1 = b >> 8U [L56] b2 = b >> 16U [L57] b3 = b >> 24U [L58] na = (unsigned char)4 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, na=4] [L59] COND TRUE a3 == (unsigned char)0 [L60] na = na - 1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, na=3] [L61] COND TRUE a2 == (unsigned char)0 [L62] na = na - 1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, na=2] [L63] COND TRUE a1 == (unsigned char)0 [L64] na = na - 1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, na=1] [L68] nb = (unsigned char)4 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, na=1, nb=4] [L69] COND TRUE b3 == (unsigned char)0 [L70] nb = nb - 1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, na=1, nb=3] [L71] COND TRUE b2 == (unsigned char)0 [L72] nb = nb - 1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, na=1, nb=2] [L73] COND TRUE b1 == (unsigned char)0 [L74] nb = nb - 1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, na=1, nb=1] [L78] carry = (unsigned short)0 [L79] i = (unsigned char)0 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L83] COND TRUE i < na VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L84] COND TRUE i == (unsigned char)0 [L84] partial_sum = partial_sum + a0 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L85] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L86] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L87] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L89] COND TRUE i < nb VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L90] COND TRUE i == (unsigned char)0 [L90] partial_sum = partial_sum + b0 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=255] [L91] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=255] [L92] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=255] [L93] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=255] [L95] COND TRUE partial_sum > ((unsigned char)254) [L96] partial_sum = partial_sum & ((unsigned char)255) [L97] carry = (unsigned short)1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255] [L99] COND TRUE i == (unsigned char)0 [L99] r0 = (unsigned char)partial_sum VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255, r0=-1] [L100] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255, r0=-1] [L101] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255, r0=-1] [L102] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255, r0=-1] [L104] i = i + (unsigned char)1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=1, i=1, na=1, nb=1, partial_sum=255, r0=-1] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L83] COND FALSE !(i < na) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L89] COND FALSE !(i < nb) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L95] COND FALSE !(partial_sum > ((unsigned char)254)) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L99] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L100] COND TRUE i == (unsigned char)1 [L100] r1 = (unsigned char)partial_sum VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L101] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L102] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L104] i = i + (unsigned char)1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L80] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L107] COND TRUE i < (unsigned char)4 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L108] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L109] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L110] COND TRUE i == (unsigned char)2 [L110] r2 = (unsigned char)0 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0] [L111] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0] [L113] i = i + (unsigned char)1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0] [L107] COND TRUE i < (unsigned char)4 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0] [L108] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0] [L109] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0] [L110] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0] [L111] COND TRUE i == (unsigned char)3 [L111] r3 = (unsigned char)0 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0, r3=0] [L113] i = i + (unsigned char)1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=4, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0, r3=0] [L107] COND FALSE !(i < (unsigned char)4) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=4, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0, r3=0] [L116] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L118] return r; VAL [\old(a)=0, \old(b)=255, \result=511, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=4, na=1, nb=1, partial_sum=1, r=511, r0=-1, r1=1, r2=0, r3=0] [L129] RET, EXPR mp_add(a, b) [L129] r = mp_add(a, b) [L131] CALL __VERIFIER_assert(r == a + b) [L24] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L25] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 54.3s, OverallIterations: 15, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 33.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6322 SdHoareTripleChecker+Valid, 15.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6322 mSDsluCounter, 8225 SdHoareTripleChecker+Invalid, 13.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 559 IncrementalHoareTripleChecker+Unchecked, 6957 mSDsCounter, 979 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13626 IncrementalHoareTripleChecker+Invalid, 15164 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 979 mSolverCounterUnsat, 1268 mSDtfsCounter, 13626 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1634 GetRequests, 1350 SyntacticMatches, 13 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4426 ImplicationChecksByTransitivity, 19.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3535occurred in iteration=13, InterpolantAutomatonStates: 217, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 14 MinimizatonAttempts, 6306 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 13.8s InterpolantComputationTime, 820 NumberOfCodeBlocks, 820 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 1490 ConstructedInterpolants, 83 QuantifiedInterpolants, 17257 SizeOfPredicates, 103 NumberOfNonLiveVariables, 1586 ConjunctsInSsa, 183 ConjunctsInUnsatCore, 42 InterpolantComputations, 19 PerfectInterpolantSequences, 309/408 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 proved your program to be incorrect! [2021-11-23 02:58:32,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e4acdb4-deb2-4528-9e26-6508d3896dde/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE