./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound100.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound100.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF --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 cd96693dadae00828d220f96f6be5e1b4d41427aeea8fb5ef5c380021c3ccf91 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:24:12,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:24:12,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:24:12,227 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:24:12,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:24:12,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:24:12,232 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:24:12,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:24:12,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:24:12,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:24:12,242 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:24:12,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:24:12,244 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:24:12,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:24:12,248 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:24:12,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:24:12,252 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:24:12,254 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:24:12,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:24:12,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:24:12,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:24:12,265 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:24:12,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:24:12,269 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:24:12,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:24:12,275 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:24:12,275 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:24:12,277 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:24:12,278 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:24:12,279 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:24:12,280 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:24:12,281 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:24:12,283 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:24:12,284 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:24:12,286 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:24:12,286 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:24:12,288 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:24:12,288 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:24:12,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:24:12,290 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:24:12,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:24:12,293 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:24:12,326 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:24:12,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:24:12,328 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:24:12,329 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:24:12,329 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:24:12,329 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:24:12,330 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:24:12,330 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:24:12,331 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:24:12,331 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:24:12,331 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:24:12,332 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:24:12,332 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:24:12,333 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:24:12,333 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:24:12,333 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:24:12,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:24:12,335 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:24:12,335 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:24:12,335 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:24:12,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:24:12,336 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:24:12,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:24:12,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:24:12,337 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:24:12,338 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:24:12,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:24:12,338 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:24:12,339 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:24:12,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:24:12,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:24:12,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:24:12,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:24:12,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:24:12,341 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:24:12,341 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:24:12,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:24:12,342 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:24:12,342 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:24:12,343 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:24:12,343 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_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd96693dadae00828d220f96f6be5e1b4d41427aeea8fb5ef5c380021c3ccf91 [2021-11-12 23:24:12,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:24:12,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:24:12,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:24:12,737 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:24:12,738 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:24:12,740 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound100.i [2021-11-12 23:24:12,832 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/data/f17f48342/823ebb4244194e41add6ac75b9db4fb8/FLAG4bae3fe25 [2021-11-12 23:24:13,504 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:24:13,505 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound100.i [2021-11-12 23:24:13,522 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/data/f17f48342/823ebb4244194e41add6ac75b9db4fb8/FLAG4bae3fe25 [2021-11-12 23:24:13,832 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/data/f17f48342/823ebb4244194e41add6ac75b9db4fb8 [2021-11-12 23:24:13,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:24:13,837 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:24:13,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:24:13,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:24:13,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:24:13,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:24:13" (1/1) ... [2021-11-12 23:24:13,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f5a7ee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:13, skipping insertion in model container [2021-11-12 23:24:13,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:24:13" (1/1) ... [2021-11-12 23:24:13,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:24:13,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:24:14,163 WARN L228 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_742be667-3cb0-45ed-83f2-d1ddb5e932a5/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound100.i[951,964] [2021-11-12 23:24:14,183 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:24:14,194 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:24:14,218 WARN L228 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_742be667-3cb0-45ed-83f2-d1ddb5e932a5/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound100.i[951,964] [2021-11-12 23:24:14,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:24:14,243 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:24:14,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:14 WrapperNode [2021-11-12 23:24:14,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:24:14,245 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:24:14,245 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:24:14,245 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:24:14,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:14" (1/1) ... [2021-11-12 23:24:14,265 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:14" (1/1) ... [2021-11-12 23:24:14,295 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:24:14,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:24:14,297 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:24:14,297 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:24:14,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:14" (1/1) ... [2021-11-12 23:24:14,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:14" (1/1) ... [2021-11-12 23:24:14,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:14" (1/1) ... [2021-11-12 23:24:14,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:14" (1/1) ... [2021-11-12 23:24:14,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:14" (1/1) ... [2021-11-12 23:24:14,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:14" (1/1) ... [2021-11-12 23:24:14,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:14" (1/1) ... [2021-11-12 23:24:14,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:24:14,341 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:24:14,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:24:14,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:24:14,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:14" (1/1) ... [2021-11-12 23:24:14,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:24:14,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:24:14,387 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:24:14,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:24:14,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:24:14,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:24:14,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:24:14,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:24:14,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 23:24:14,447 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 23:24:14,838 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:24:14,838 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-12 23:24:14,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:24:14 BoogieIcfgContainer [2021-11-12 23:24:14,851 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:24:14,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:24:14,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:24:14,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:24:14,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:24:13" (1/3) ... [2021-11-12 23:24:14,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6300b2b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:24:14, skipping insertion in model container [2021-11-12 23:24:14,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:14" (2/3) ... [2021-11-12 23:24:14,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6300b2b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:24:14, skipping insertion in model container [2021-11-12 23:24:14,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:24:14" (3/3) ... [2021-11-12 23:24:14,867 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound100.i [2021-11-12 23:24:14,874 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:24:14,875 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:24:14,954 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:24:14,971 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 [2021-11-12 23:24:14,971 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:24:15,008 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 23:24:15,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-12 23:24:15,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:15,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:15,020 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:15,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:15,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1881233236, now seen corresponding path program 1 times [2021-11-12 23:24:15,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:24:15,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190432010] [2021-11-12 23:24:15,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:15,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:24:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:15,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:15,300 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:24:15,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190432010] [2021-11-12 23:24:15,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190432010] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:15,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:15,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 23:24:15,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677922567] [2021-11-12 23:24:15,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:15,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:24:15,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:24:15,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:24:15,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:24:15,399 INFO L87 Difference]: Start difference. First operand has 15 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:15,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:15,470 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2021-11-12 23:24:15,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:24:15,474 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-12 23:24:15,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:15,484 INFO L225 Difference]: With dead ends: 27 [2021-11-12 23:24:15,484 INFO L226 Difference]: Without dead ends: 13 [2021-11-12 23:24:15,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:24:15,497 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.65ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.48ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:15,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 4 Unknown, 0 Unchecked, 0.65ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 47.48ms Time] [2021-11-12 23:24:15,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-12 23:24:15,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-12 23:24:15,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-12 23:24:15,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-12 23:24:15,552 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2021-11-12 23:24:15,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:15,553 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-12 23:24:15,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:15,554 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-12 23:24:15,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 23:24:15,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:15,555 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:15,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:24:15,556 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:15,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:15,558 INFO L85 PathProgramCache]: Analyzing trace with hash -515868340, now seen corresponding path program 1 times [2021-11-12 23:24:15,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:24:15,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252868073] [2021-11-12 23:24:15,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:15,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:24:15,595 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-12 23:24:15,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922798307] [2021-11-12 23:24:15,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:15,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:24:15,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:24:15,599 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:24:15,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 23:24:15,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:15,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:24:15,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:15,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:15,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:16,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:16,415 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:24:16,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252868073] [2021-11-12 23:24:16,416 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:24:16,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922798307] [2021-11-12 23:24:16,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922798307] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:16,417 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:16,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-12 23:24:16,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59754327] [2021-11-12 23:24:16,418 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:16,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:24:16,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:24:16,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:24:16,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:24:16,420 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:18,470 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-12 23:24:20,659 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:22,758 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:24,930 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-12 23:24:27,068 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-12 23:24:29,258 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-12 23:24:29,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:29,381 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2021-11-12 23:24:29,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:24:29,382 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-12 23:24:29,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:29,384 INFO L225 Difference]: With dead ends: 31 [2021-11-12 23:24:29,384 INFO L226 Difference]: Without dead ends: 27 [2021-11-12 23:24:29,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:24:29,387 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12292.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.22ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12916.57ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:29,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 42 Invalid, 62 Unknown, 0 Unchecked, 3.22ms Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 6 Unknown, 0 Unchecked, 12916.57ms Time] [2021-11-12 23:24:29,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-12 23:24:29,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-12 23:24:29,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-12 23:24:29,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-11-12 23:24:29,399 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 8 [2021-11-12 23:24:29,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:29,400 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-11-12 23:24:29,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:29,400 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-11-12 23:24:29,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-12 23:24:29,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:29,403 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:29,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:29,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:24:29,625 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:29,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:29,626 INFO L85 PathProgramCache]: Analyzing trace with hash 977989570, now seen corresponding path program 1 times [2021-11-12 23:24:29,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:24:29,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10445776] [2021-11-12 23:24:29,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:29,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:24:29,661 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-12 23:24:29,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055527129] [2021-11-12 23:24:29,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:29,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:24:29,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:24:29,665 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:24:29,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 23:24:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:29,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:24:29,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:30,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:30,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:30,234 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:24:30,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10445776] [2021-11-12 23:24:30,235 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:24:30,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055527129] [2021-11-12 23:24:30,235 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~b~0#1|] [2021-11-12 23:24:30,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1286544797] [2021-11-12 23:24:30,258 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-12 23:24:30,258 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:24:30,264 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 23:24:30,270 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 23:24:30,271 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 23:24:30,308 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:30,310 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:24:30,311 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:30,312 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-12 23:24:30,316 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:24:30,317 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:30,318 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-12 23:24:30,324 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 128 [2021-11-12 23:24:30,362 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_16|], 10=[|v_#valid_17|]} [2021-11-12 23:24:30,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:30,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-12 23:24:30,405 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:30,406 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:24:30,409 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:30,410 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-12 23:24:30,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 23:24:30,427 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-12 23:24:30,427 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:30,428 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:24:30,429 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:30,429 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-12 23:24:30,429 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 23:24:30,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:30,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:30,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:30,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:30,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:30,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:24:30,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-12 23:24:30,508 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:30,511 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:24:30,512 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:30,513 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 23:24:30,514 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-12 23:24:30,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:30,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:30,567 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:30,574 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-11-12 23:24:30,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 23:24:30,576 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:228, output treesize:98 [2021-11-12 23:24:30,585 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:30,599 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 107 [2021-11-12 23:24:30,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:30,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:30,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:30,735 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:30,750 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 287 [2021-11-12 23:24:30,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:30,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:30,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:30,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:30,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:30,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:30,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:30,878 INFO L180 QuantifierPusher]: treesize reduction 42, result has 54.3 percent of original size [2021-11-12 23:24:30,881 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-12 23:24:30,897 INFO L180 QuantifierPusher]: treesize reduction 43, result has 64.2 percent of original size [2021-11-12 23:24:30,912 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:24:30,913 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:30,918 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:24:30,919 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:30,920 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-12 23:24:30,925 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-12 23:24:30,928 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 23:24:30,930 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 23:24:30,938 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-11-12 23:24:30,945 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-12 23:24:30,951 INFO L180 QuantifierPusher]: treesize reduction 42, result has 54.3 percent of original size [2021-11-12 23:24:30,954 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-12 23:24:30,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:30,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:30,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:30,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 23:24:31,003 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2021-11-12 23:24:31,011 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 23:24:32,100 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 23:24:32,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:32,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-12 23:24:32,100 ERROR L172 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2021-11-12 23:24:32,101 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-12 23:24:32,107 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 23:24:32,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:32,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-12 23:24:32,314 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-11-12 23:24:32,316 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 23:24:32,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 11:24:32 BoogieIcfgContainer [2021-11-12 23:24:32,336 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 23:24:32,336 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 23:24:32,336 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 23:24:32,337 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 23:24:32,337 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:24:14" (3/4) ... [2021-11-12 23:24:32,341 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-12 23:24:32,341 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 23:24:32,342 INFO L158 Benchmark]: Toolchain (without parser) took 18505.17ms. Allocated memory was 92.3MB in the beginning and 138.4MB in the end (delta: 46.1MB). Free memory was 55.2MB in the beginning and 55.6MB in the end (delta: -358.5kB). Peak memory consumption was 44.8MB. Max. memory is 16.1GB. [2021-11-12 23:24:32,342 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 92.3MB. Free memory is still 71.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:24:32,343 INFO L158 Benchmark]: CACSL2BoogieTranslator took 404.92ms. Allocated memory was 92.3MB in the beginning and 138.4MB in the end (delta: 46.1MB). Free memory was 55.1MB in the beginning and 114.1MB in the end (delta: -59.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 23:24:32,343 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.76ms. Allocated memory is still 138.4MB. Free memory was 113.7MB in the beginning and 112.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:24:32,344 INFO L158 Benchmark]: Boogie Preprocessor took 43.93ms. Allocated memory is still 138.4MB. Free memory was 112.6MB in the beginning and 111.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:24:32,344 INFO L158 Benchmark]: RCFGBuilder took 509.55ms. Allocated memory is still 138.4MB. Free memory was 111.5MB in the beginning and 100.0MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:24:32,345 INFO L158 Benchmark]: TraceAbstraction took 17480.35ms. Allocated memory is still 138.4MB. Free memory was 99.6MB in the beginning and 55.6MB in the end (delta: 44.0MB). Peak memory consumption was 45.4MB. Max. memory is 16.1GB. [2021-11-12 23:24:32,345 INFO L158 Benchmark]: Witness Printer took 4.92ms. Allocated memory is still 138.4MB. Free memory is still 55.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:24:32,347 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 92.3MB. Free memory is still 71.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 404.92ms. Allocated memory was 92.3MB in the beginning and 138.4MB in the end (delta: 46.1MB). Free memory was 55.1MB in the beginning and 114.1MB in the end (delta: -59.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.76ms. Allocated memory is still 138.4MB. Free memory was 113.7MB in the beginning and 112.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.93ms. Allocated memory is still 138.4MB. Free memory was 112.6MB in the beginning and 111.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 509.55ms. Allocated memory is still 138.4MB. Free memory was 111.5MB in the beginning and 100.0MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 17480.35ms. Allocated memory is still 138.4MB. Free memory was 99.6MB in the beginning and 55.6MB in the end (delta: 44.0MB). Peak memory consumption was 45.4MB. Max. memory is 16.1GB. * Witness Printer took 4.92ms. Allocated memory is still 138.4MB. Free memory is still 55.6MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L26] unsigned A, B; [L27] unsigned q, r, b; [L28] A = __VERIFIER_nondet_uint() [L29] CALL assume_abort_if_not(A>=0 && A<=100) [L16] COND TRUE !cond [L29] RET assume_abort_if_not(A>=0 && A<=100) [L30] B = 1 [L31] q = 0 [L32] r = A [L33] b = B [L34] COND TRUE 1 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] COND TRUE 1 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] COND TRUE 1 [L35] COND TRUE !(r >= b) [L38] COND TRUE 1 [L39] CALL __VERIFIER_assert(A == q * b + r) [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 17.4s, OverallIterations: 3, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 13.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 16 SdHoareTripleChecker+Valid, 12964.06ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14 mSDsluCounter, 56 SdHoareTripleChecker+Invalid, 12325.47ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 37 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 53 IncrementalHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 22 mSDtfsCounter, 53 mSolverCounterSat, 3.87ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred 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, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 27 NumberOfCodeBlocks, 27 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 31 ConstructedInterpolants, 0 QuantifiedInterpolants, 229 SizeOfPredicates, 4 NumberOfNonLiveVariables, 108 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 0/6 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 [2021-11-12 23:24:32,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/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_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound100.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF --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 cd96693dadae00828d220f96f6be5e1b4d41427aeea8fb5ef5c380021c3ccf91 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:24:35,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:24:35,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:24:35,401 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:24:35,402 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:24:35,407 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:24:35,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:24:35,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:24:35,420 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:24:35,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:24:35,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:24:35,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:24:35,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:24:35,442 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:24:35,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:24:35,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:24:35,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:24:35,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:24:35,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:24:35,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:24:35,470 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:24:35,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:24:35,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:24:35,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:24:35,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:24:35,488 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:24:35,489 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:24:35,492 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:24:35,493 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:24:35,494 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:24:35,495 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:24:35,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:24:35,499 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:24:35,500 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:24:35,502 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:24:35,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:24:35,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:24:35,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:24:35,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:24:35,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:24:35,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:24:35,515 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:24:35,569 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:24:35,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:24:35,572 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:24:35,572 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:24:35,572 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:24:35,573 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:24:35,573 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:24:35,573 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:24:35,573 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:24:35,574 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:24:35,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:24:35,577 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:24:35,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:24:35,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:24:35,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:24:35,579 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:24:35,579 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:24:35,579 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:24:35,579 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:24:35,580 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:24:35,580 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:24:35,580 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:24:35,581 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:24:35,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:24:35,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:24:35,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:24:35,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:24:35,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:24:35,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:24:35,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:24:35,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:24:35,583 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:24:35,584 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:24:35,584 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:24:35,585 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:24:35,585 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:24:35,585 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_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd96693dadae00828d220f96f6be5e1b4d41427aeea8fb5ef5c380021c3ccf91 [2021-11-12 23:24:36,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:24:36,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:24:36,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:24:36,059 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:24:36,060 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:24:36,062 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound100.i [2021-11-12 23:24:36,144 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/data/ce6642943/1a1cd9a09e64418ba8040e196cf37883/FLAGffc7a2318 [2021-11-12 23:24:36,822 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:24:36,825 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound100.i [2021-11-12 23:24:36,835 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/data/ce6642943/1a1cd9a09e64418ba8040e196cf37883/FLAGffc7a2318 [2021-11-12 23:24:37,152 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/data/ce6642943/1a1cd9a09e64418ba8040e196cf37883 [2021-11-12 23:24:37,156 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:24:37,158 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:24:37,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:24:37,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:24:37,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:24:37,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:24:37" (1/1) ... [2021-11-12 23:24:37,182 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b54bc87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:37, skipping insertion in model container [2021-11-12 23:24:37,182 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:24:37" (1/1) ... [2021-11-12 23:24:37,192 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:24:37,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:24:37,399 WARN L228 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_742be667-3cb0-45ed-83f2-d1ddb5e932a5/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound100.i[951,964] [2021-11-12 23:24:37,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:24:37,432 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:24:37,449 WARN L228 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_742be667-3cb0-45ed-83f2-d1ddb5e932a5/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound100.i[951,964] [2021-11-12 23:24:37,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:24:37,499 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:24:37,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:37 WrapperNode [2021-11-12 23:24:37,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:24:37,502 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:24:37,502 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:24:37,502 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:24:37,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:37" (1/1) ... [2021-11-12 23:24:37,523 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:37" (1/1) ... [2021-11-12 23:24:37,556 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:24:37,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:24:37,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:24:37,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:24:37,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:37" (1/1) ... [2021-11-12 23:24:37,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:37" (1/1) ... [2021-11-12 23:24:37,589 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:37" (1/1) ... [2021-11-12 23:24:37,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:37" (1/1) ... [2021-11-12 23:24:37,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:37" (1/1) ... [2021-11-12 23:24:37,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:37" (1/1) ... [2021-11-12 23:24:37,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:37" (1/1) ... [2021-11-12 23:24:37,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:24:37,627 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:24:37,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:24:37,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:24:37,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:37" (1/1) ... [2021-11-12 23:24:37,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:24:37,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:24:37,676 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:24:37,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:24:37,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:24:37,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:24:37,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:24:37,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:24:37,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 23:24:37,745 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 23:24:38,079 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:24:38,080 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-12 23:24:38,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:24:38 BoogieIcfgContainer [2021-11-12 23:24:38,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:24:38,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:24:38,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:24:38,090 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:24:38,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:24:37" (1/3) ... [2021-11-12 23:24:38,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@435357 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:24:38, skipping insertion in model container [2021-11-12 23:24:38,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:37" (2/3) ... [2021-11-12 23:24:38,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@435357 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:24:38, skipping insertion in model container [2021-11-12 23:24:38,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:24:38" (3/3) ... [2021-11-12 23:24:38,095 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound100.i [2021-11-12 23:24:38,106 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:24:38,107 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:24:38,185 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:24:38,201 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 [2021-11-12 23:24:38,202 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:24:38,247 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 23:24:38,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-12 23:24:38,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:38,256 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:38,257 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:38,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:38,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1090701444, now seen corresponding path program 1 times [2021-11-12 23:24:38,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:38,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028461016] [2021-11-12 23:24:38,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:38,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:38,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:38,288 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:38,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:24:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:38,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:24:38,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:38,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:38,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:38,536 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:38,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028461016] [2021-11-12 23:24:38,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028461016] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:38,538 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:38,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:24:38,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216108936] [2021-11-12 23:24:38,541 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:38,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:24:38,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:38,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:24:38,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:24:38,602 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:38,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:38,656 INFO L93 Difference]: Finished difference Result 39 states and 58 transitions. [2021-11-12 23:24:38,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:24:38,659 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-12 23:24:38,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:38,671 INFO L225 Difference]: With dead ends: 39 [2021-11-12 23:24:38,671 INFO L226 Difference]: Without dead ends: 17 [2021-11-12 23:24:38,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:24:38,684 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.21ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:38,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 2.21ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:24:38,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-12 23:24:38,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-12 23:24:38,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-12 23:24:38,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-12 23:24:38,755 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2021-11-12 23:24:38,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:38,756 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-12 23:24:38,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:38,761 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-12 23:24:38,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-12 23:24:38,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:38,763 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:38,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:38,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:38,977 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:38,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:38,979 INFO L85 PathProgramCache]: Analyzing trace with hash -2095969935, now seen corresponding path program 1 times [2021-11-12 23:24:38,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:38,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623696899] [2021-11-12 23:24:38,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:38,980 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:38,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:38,982 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:38,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:24:39,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:39,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 23:24:39,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:39,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:39,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:40,601 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:40,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623696899] [2021-11-12 23:24:40,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623696899] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:40,602 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:40,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 6] imperfect sequences [] total 12 [2021-11-12 23:24:40,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856555889] [2021-11-12 23:24:40,603 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:40,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:24:40,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:40,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:24:40,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:24:40,607 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:43,909 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:44,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:44,403 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-11-12 23:24:44,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:24:44,406 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-12 23:24:44,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:44,409 INFO L225 Difference]: With dead ends: 36 [2021-11-12 23:24:44,409 INFO L226 Difference]: Without dead ends: 32 [2021-11-12 23:24:44,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:24:44,416 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 55 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2822.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.55ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2925.29ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:44,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 60 Invalid, 106 Unknown, 0 Unchecked, 5.55ms Time], IncrementalHoareTripleChecker [27 Valid, 78 Invalid, 1 Unknown, 0 Unchecked, 2925.29ms Time] [2021-11-12 23:24:44,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-12 23:24:44,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-12 23:24:44,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-12 23:24:44,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-11-12 23:24:44,446 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 11 [2021-11-12 23:24:44,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:44,447 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-11-12 23:24:44,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:44,447 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-11-12 23:24:44,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-12 23:24:44,449 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:44,450 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:44,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:44,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:44,663 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:44,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:44,664 INFO L85 PathProgramCache]: Analyzing trace with hash 2061362535, now seen corresponding path program 1 times [2021-11-12 23:24:44,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:44,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014267158] [2021-11-12 23:24:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:44,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:44,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:44,674 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:44,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:24:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:44,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:24:44,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:45,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:45,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:48,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:48,057 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:48,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014267158] [2021-11-12 23:24:48,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014267158] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:24:48,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [90132631] [2021-11-12 23:24:48,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:48,059 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:24:48,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:24:48,069 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:24:48,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-12 23:24:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:48,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:24:48,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:48,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:48,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:49,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:49,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [90132631] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:24:49,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809930139] [2021-11-12 23:24:49,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:49,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:24:49,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:24:49,637 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:24:49,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-12 23:24:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:49,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:24:49,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:49,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:49,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:50,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:50,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809930139] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:24:50,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:24:50,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7, 7, 10, 8] total 21 [2021-11-12 23:24:50,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630654715] [2021-11-12 23:24:50,724 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:24:50,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-12 23:24:50,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:50,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-12 23:24:50,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:24:50,727 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:57,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:57,980 INFO L93 Difference]: Finished difference Result 70 states and 93 transitions. [2021-11-12 23:24:57,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-12 23:24:57,981 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-12 23:24:57,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:57,983 INFO L225 Difference]: With dead ends: 70 [2021-11-12 23:24:57,983 INFO L226 Difference]: Without dead ends: 63 [2021-11-12 23:24:57,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=197, Invalid=673, Unknown=0, NotChecked=0, Total=870 [2021-11-12 23:24:57,987 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 108 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4969.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.07ms SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5162.79ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:57,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 152 Invalid, 321 Unknown, 0 Unchecked, 8.07ms Time], IncrementalHoareTripleChecker [92 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 5162.79ms Time] [2021-11-12 23:24:57,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-12 23:24:58,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 42. [2021-11-12 23:24:58,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.25) internal successors, (40), 34 states have internal predecessors, (40), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-12 23:24:58,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2021-11-12 23:24:58,008 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 15 [2021-11-12 23:24:58,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:58,009 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2021-11-12 23:24:58,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:58,010 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2021-11-12 23:24:58,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-12 23:24:58,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:58,012 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:58,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:58,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:58,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:58,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:24:58,634 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:58,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:58,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1238079191, now seen corresponding path program 1 times [2021-11-12 23:24:58,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:58,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752782735] [2021-11-12 23:24:58,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:58,636 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:58,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:58,638 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:58,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:24:58,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:58,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:24:58,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:58,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:24:58,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:58,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:24:58,938 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:58,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752782735] [2021-11-12 23:24:58,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752782735] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:58,939 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:58,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:24:58,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24335993] [2021-11-12 23:24:58,940 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:58,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:24:58,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:58,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:24:58,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:24:58,943 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-12 23:24:58,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:58,985 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2021-11-12 23:24:58,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:24:58,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-11-12 23:24:58,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:58,997 INFO L225 Difference]: With dead ends: 70 [2021-11-12 23:24:58,997 INFO L226 Difference]: Without dead ends: 38 [2021-11-12 23:24:58,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:24:59,000 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.50ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.65ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:59,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 9 Unknown, 0 Unchecked, 0.50ms Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 20.65ms Time] [2021-11-12 23:24:59,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-12 23:24:59,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-12 23:24:59,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.206896551724138) internal successors, (35), 31 states have internal predecessors, (35), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-12 23:24:59,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-11-12 23:24:59,017 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 27 [2021-11-12 23:24:59,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:59,017 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-11-12 23:24:59,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-12 23:24:59,018 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-11-12 23:24:59,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-12 23:24:59,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:59,020 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:59,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:59,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:59,225 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:59,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:59,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1335567410, now seen corresponding path program 1 times [2021-11-12 23:24:59,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:59,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842475417] [2021-11-12 23:24:59,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:59,227 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:59,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:59,228 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:59,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:24:59,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:59,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:24:59,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:24:59,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:24:59,624 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:59,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842475417] [2021-11-12 23:24:59,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842475417] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:24:59,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1189752779] [2021-11-12 23:24:59,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:59,625 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:24:59,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:24:59,633 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:24:59,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-12 23:24:59,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:59,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:24:59,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:24:59,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:24:59,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1189752779] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:24:59,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928315634] [2021-11-12 23:24:59,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:59,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:24:59,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:24:59,998 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:25:00,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-12 23:25:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:00,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:25:00,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:00,255 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:25:00,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:25:00,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928315634] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:00,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:25:00,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4, 5, 4, 5] total 7 [2021-11-12 23:25:00,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130574152] [2021-11-12 23:25:00,366 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:25:00,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:25:00,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:00,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:25:00,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:25:00,373 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-12 23:25:00,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:00,497 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2021-11-12 23:25:00,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:25:00,501 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2021-11-12 23:25:00,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:00,502 INFO L225 Difference]: With dead ends: 68 [2021-11-12 23:25:00,502 INFO L226 Difference]: Without dead ends: 32 [2021-11-12 23:25:00,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:25:00,504 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.12ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 110.76ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:00,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 87 Invalid, 54 Unknown, 0 Unchecked, 2.12ms Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 110.76ms Time] [2021-11-12 23:25:00,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-12 23:25:00,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-12 23:25:00,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-12 23:25:00,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-11-12 23:25:00,524 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 29 [2021-11-12 23:25:00,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:00,525 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-11-12 23:25:00,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-12 23:25:00,525 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-11-12 23:25:00,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-12 23:25:00,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:00,528 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:00,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:00,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:00,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:01,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:25:01,134 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:25:01,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:01,135 INFO L85 PathProgramCache]: Analyzing trace with hash 532465357, now seen corresponding path program 2 times [2021-11-12 23:25:01,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:01,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2056663273] [2021-11-12 23:25:01,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:25:01,136 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:01,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:01,137 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:01,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:25:01,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:25:01,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:01,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-12 23:25:01,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:02,249 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:25:02,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:25:14,977 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:14,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2056663273] [2021-11-12 23:25:14,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2056663273] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:14,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1161230791] [2021-11-12 23:25:14,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:25:14,979 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:25:14,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:25:14,980 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:25:14,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-12 23:25:15,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:25:15,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:15,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-12 23:25:15,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:25:15,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:25,288 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:25:25,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1161230791] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:25,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102757606] [2021-11-12 23:25:25,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:25:25,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:25:25,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:25:25,301 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:25:25,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-12 23:25:25,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:25:25,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:25,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-12 23:25:25,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:25,968 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:25:25,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:56,776 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:25:56,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102757606] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:56,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:25:56,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 14, 12, 16, 13] total 38 [2021-11-12 23:25:56,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415935194] [2021-11-12 23:25:56,778 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:25:56,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-12 23:25:56,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:56,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-12 23:25:56,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1174, Unknown=7, NotChecked=0, Total=1406 [2021-11-12 23:25:56,780 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 36 states have internal predecessors, (70), 11 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-12 23:26:02,897 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:26:27,445 WARN L227 SmtUtils]: Spent 13.98s on a formula simplification. DAG size of input: 94 DAG size of output: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:26:28,556 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:27:01,818 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:27:04,936 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:27:13,596 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:27:15,621 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:27:17,643 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:27:19,649 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:27:21,654 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:27:23,660 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:27:25,665 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:27:54,158 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:28:00,820 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:28:02,886 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:28:04,031 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:28:06,035 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:28:08,348 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:28:10,958 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:28:12,965 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:28:29,539 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:28:31,689 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:28:52,057 WARN L227 SmtUtils]: Spent 15.00s on a formula simplification. DAG size of input: 110 DAG size of output: 84 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:29:02,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:02,865 INFO L93 Difference]: Finished difference Result 131 states and 174 transitions. [2021-11-12 23:29:02,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-12 23:29:02,871 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 36 states have internal predecessors, (70), 11 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 31 [2021-11-12 23:29:02,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:02,873 INFO L225 Difference]: With dead ends: 131 [2021-11-12 23:29:02,873 INFO L226 Difference]: Without dead ends: 102 [2021-11-12 23:29:02,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 149 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 166.9s TimeCoverageRelationStatistics Valid=784, Invalid=3483, Unknown=23, NotChecked=0, Total=4290 [2021-11-12 23:29:02,878 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 279 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 291 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62000.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.89ms SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62888.66ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:02,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 329 Invalid, 947 Unknown, 0 Unchecked, 13.89ms Time], IncrementalHoareTripleChecker [291 Valid, 638 Invalid, 18 Unknown, 0 Unchecked, 62888.66ms Time] [2021-11-12 23:29:02,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-12 23:29:02,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 82. [2021-11-12 23:29:02,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 68 states have internal predecessors, (73), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 9 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:29:02,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2021-11-12 23:29:02,902 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 31 [2021-11-12 23:29:02,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:02,902 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2021-11-12 23:29:02,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 36 states have internal predecessors, (70), 11 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-12 23:29:02,903 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2021-11-12 23:29:02,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-12 23:29:02,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:02,905 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:02,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:03,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-12 23:29:03,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-11-12 23:29:03,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:29:03,517 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:03,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:03,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1234214144, now seen corresponding path program 3 times [2021-11-12 23:29:03,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:03,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516929199] [2021-11-12 23:29:03,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:29:03,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:03,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:03,521 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:03,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:29:03,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-12 23:29:03,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:29:03,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:29:03,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:04,061 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:29:04,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:04,337 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:29:04,337 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:04,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [516929199] [2021-11-12 23:29:04,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [516929199] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:29:04,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1001378488] [2021-11-12 23:29:04,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:29:04,337 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:29:04,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:29:04,338 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:29:04,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 23:29:04,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-12 23:29:04,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:29:04,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:29:04,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:04,714 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:29:04,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:04,867 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:29:04,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1001378488] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:29:04,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938559661] [2021-11-12 23:29:04,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:29:04,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:29:04,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:29:04,868 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:29:04,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-12 23:29:04,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-12 23:29:04,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:29:04,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:29:04,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:29:05,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:29:05,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938559661] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:29:05,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:29:05,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5, 7, 5, 7] total 16 [2021-11-12 23:29:05,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374994288] [2021-11-12 23:29:05,375 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:29:05,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 23:29:05,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:05,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 23:29:05,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:29:05,377 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-12 23:29:06,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:06,032 INFO L93 Difference]: Finished difference Result 108 states and 136 transitions. [2021-11-12 23:29:06,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 23:29:06,038 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2021-11-12 23:29:06,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:06,039 INFO L225 Difference]: With dead ends: 108 [2021-11-12 23:29:06,039 INFO L226 Difference]: Without dead ends: 67 [2021-11-12 23:29:06,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 209 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:29:06,041 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 40 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 195.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.01ms SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 224.29ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:06,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 147 Invalid, 165 Unknown, 0 Unchecked, 2.01ms Time], IncrementalHoareTripleChecker [51 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 224.29ms Time] [2021-11-12 23:29:06,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-12 23:29:06,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2021-11-12 23:29:06,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 52 states have internal predecessors, (55), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 5 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-12 23:29:06,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2021-11-12 23:29:06,060 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 39 [2021-11-12 23:29:06,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:06,061 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2021-11-12 23:29:06,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-12 23:29:06,061 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2021-11-12 23:29:06,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-12 23:29:06,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:06,063 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:06,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:06,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:06,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-11-12 23:29:06,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:29:06,681 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:06,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:06,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1894170587, now seen corresponding path program 4 times [2021-11-12 23:29:06,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:06,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060173604] [2021-11-12 23:29:06,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:29:06,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:06,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:06,683 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:06,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:29:06,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:29:06,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:29:06,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-12 23:29:06,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:08,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:29:38,081 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:38,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060173604] [2021-11-12 23:29:38,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060173604] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:29:38,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1173976786] [2021-11-12 23:29:38,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:29:38,082 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:29:38,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:29:38,083 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:29:38,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-12 23:29:38,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:29:38,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:29:38,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-12 23:29:38,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:39,055 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:29:39,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:30:11,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1173976786] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:30:11,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280558037] [2021-11-12 23:30:11,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:30:11,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:30:11,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:30:11,618 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:30:11,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_742be667-3cb0-45ed-83f2-d1ddb5e932a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-12 23:30:11,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:30:11,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:30:11,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-12 23:30:11,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:12,512 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:12,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:54,705 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:30:54,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280558037] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:30:54,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:30:54,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 15, 15, 19, 17] total 48 [2021-11-12 23:30:54,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18552297] [2021-11-12 23:30:54,706 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:30:54,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-12 23:30:54,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:54,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-12 23:30:54,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=1850, Unknown=19, NotChecked=0, Total=2256 [2021-11-12 23:30:54,709 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 48 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 45 states have internal predecessors, (85), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-12 23:33:27,771 WARN L227 SmtUtils]: Spent 2.44m on a formula simplification. DAG size of input: 210 DAG size of output: 174 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:33:29,206 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:33:31,212 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:33:33,186 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:33:35,529 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:33:37,553 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:33:39,851 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:33:41,195 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:35:48,991 WARN L227 SmtUtils]: Spent 1.94m on a formula simplification. DAG size of input: 185 DAG size of output: 179 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:35:52,846 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:35:54,849 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:35:56,866 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:36:00,478 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:36:02,532 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:06,422 WARN L227 SmtUtils]: Spent 1.91m on a formula simplification. DAG size of input: 192 DAG size of output: 160 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:38:08,726 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []