./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound20.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound20.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH --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 67e1f0759ae3eef1dbaa6f8b0d73161640ce69ba156f9f744d71e8aa9cf95f87 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:08:05,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:08:05,200 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:08:05,240 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:08:05,240 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:08:05,242 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:08:05,244 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:08:05,247 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:08:05,249 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:08:05,251 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:08:05,252 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:08:05,254 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:08:05,254 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:08:05,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:08:05,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:08:05,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:08:05,262 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:08:05,263 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:08:05,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:08:05,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:08:05,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:08:05,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:08:05,298 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:08:05,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:08:05,304 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:08:05,310 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:08:05,310 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:08:05,312 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:08:05,312 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:08:05,315 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:08:05,317 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:08:05,318 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:08:05,320 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:08:05,322 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:08:05,324 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:08:05,324 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:08:05,325 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:08:05,326 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:08:05,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:08:05,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:08:05,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:08:05,330 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:08:05,380 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:08:05,384 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:08:05,386 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:08:05,386 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:08:05,386 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:08:05,387 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:08:05,387 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:08:05,387 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:08:05,388 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:08:05,388 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:08:05,396 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:08:05,397 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:08:05,397 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:08:05,397 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:08:05,398 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:08:05,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:08:05,399 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:08:05,400 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:08:05,400 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:08:05,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:08:05,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:08:05,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:08:05,408 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:08:05,408 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:08:05,408 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:08:05,409 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:08:05,409 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:08:05,409 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:08:05,410 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:08:05,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:08:05,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:08:05,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:08:05,413 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:08:05,413 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:08:05,414 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:08:05,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:08:05,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:08:05,416 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:08:05,416 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:08:05,416 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_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67e1f0759ae3eef1dbaa6f8b0d73161640ce69ba156f9f744d71e8aa9cf95f87 [2021-11-03 04:08:05,722 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:08:05,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:08:05,756 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:08:05,757 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:08:05,759 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:08:05,760 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound20.i [2021-11-03 04:08:05,854 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/data/23e2364c7/947800f8207f417d81814bc9128dd787/FLAGdcc1ab891 [2021-11-03 04:08:06,369 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:08:06,374 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound20.i [2021-11-03 04:08:06,388 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/data/23e2364c7/947800f8207f417d81814bc9128dd787/FLAGdcc1ab891 [2021-11-03 04:08:06,720 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/data/23e2364c7/947800f8207f417d81814bc9128dd787 [2021-11-03 04:08:06,723 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:08:06,724 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:08:06,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:08:06,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:08:06,731 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:08:06,732 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:08:06" (1/1) ... [2021-11-03 04:08:06,733 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10e7e230 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:08:06, skipping insertion in model container [2021-11-03 04:08:06,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:08:06" (1/1) ... [2021-11-03 04:08:06,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:08:06,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:08:06,956 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_12a33d26-46d8-48f8-9018-789ff63c7269/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound20.i[950,963] [2021-11-03 04:08:06,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:08:06,982 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:08:06,993 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_12a33d26-46d8-48f8-9018-789ff63c7269/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound20.i[950,963] [2021-11-03 04:08:07,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:08:07,013 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:08:07,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:08:07 WrapperNode [2021-11-03 04:08:07,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:08:07,016 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:08:07,017 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:08:07,017 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:08:07,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:08:07" (1/1) ... [2021-11-03 04:08:07,034 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:08:07" (1/1) ... [2021-11-03 04:08:07,076 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:08:07,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:08:07,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:08:07,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:08:07,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:08:07" (1/1) ... [2021-11-03 04:08:07,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:08:07" (1/1) ... [2021-11-03 04:08:07,108 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:08:07" (1/1) ... [2021-11-03 04:08:07,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:08:07" (1/1) ... [2021-11-03 04:08:07,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:08:07" (1/1) ... [2021-11-03 04:08:07,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:08:07" (1/1) ... [2021-11-03 04:08:07,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:08:07" (1/1) ... [2021-11-03 04:08:07,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:08:07,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:08:07,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:08:07,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:08:07,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:08:07" (1/1) ... [2021-11-03 04:08:07,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:08:07,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:08:07,172 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:08:07,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:08:07,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 04:08:07,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:08:07,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:08:07,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:08:09,923 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:08:09,923 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-11-03 04:08:09,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:08:09 BoogieIcfgContainer [2021-11-03 04:08:09,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:08:09,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:08:09,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:08:09,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:08:09,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:08:06" (1/3) ... [2021-11-03 04:08:09,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ffea470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:08:09, skipping insertion in model container [2021-11-03 04:08:09,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:08:07" (2/3) ... [2021-11-03 04:08:09,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ffea470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:08:09, skipping insertion in model container [2021-11-03 04:08:09,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:08:09" (3/3) ... [2021-11-03 04:08:09,937 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound20.i [2021-11-03 04:08:09,943 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:08:09,943 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-03 04:08:09,999 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:08:10,007 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 [2021-11-03 04:08:10,008 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-03 04:08:10,024 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:10,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 04:08:10,030 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:08:10,030 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 04:08:10,031 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:08:10,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:08:10,038 INFO L85 PathProgramCache]: Analyzing trace with hash 136140001, now seen corresponding path program 1 times [2021-11-03 04:08:10,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:08:10,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144181737] [2021-11-03 04:08:10,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:10,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:08:10,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:08:10,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:10,250 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:08:10,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144181737] [2021-11-03 04:08:10,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144181737] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:08:10,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:08:10,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 04:08:10,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955865460] [2021-11-03 04:08:10,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 04:08:10,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:08:10,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 04:08:10,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:08:10,281 INFO L87 Difference]: Start difference. First operand has 14 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:10,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:08:10,298 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2021-11-03 04:08:10,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 04:08:10,300 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-03 04:08:10,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:08:10,311 INFO L225 Difference]: With dead ends: 25 [2021-11-03 04:08:10,311 INFO L226 Difference]: Without dead ends: 12 [2021-11-03 04:08:10,314 INFO L786 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 [2021-11-03 04:08:10,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-03 04:08:10,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-03 04:08:10,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:10,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-03 04:08:10,352 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 5 [2021-11-03 04:08:10,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:08:10,353 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-03 04:08:10,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:10,354 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-03 04:08:10,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 04:08:10,355 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:08:10,355 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 04:08:10,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 04:08:10,356 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:08:10,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:08:10,357 INFO L85 PathProgramCache]: Analyzing trace with hash -135046298, now seen corresponding path program 1 times [2021-11-03 04:08:10,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:08:10,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009718698] [2021-11-03 04:08:10,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:10,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:08:10,385 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 04:08:10,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264761620] [2021-11-03 04:08:10,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:10,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:08:10,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:08:10,388 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:08:10,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 04:08:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:08:10,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 04:08:10,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:08:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:10,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:08:11,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:11,197 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:08:11,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009718698] [2021-11-03 04:08:11,198 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:08:11,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264761620] [2021-11-03 04:08:11,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264761620] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:08:11,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:08:11,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:08:11,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571382282] [2021-11-03 04:08:11,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:08:11,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:08:11,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:08:11,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:08:11,204 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:13,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:08:13,736 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-11-03 04:08:13,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:08:13,737 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-03 04:08:13,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:08:13,738 INFO L225 Difference]: With dead ends: 32 [2021-11-03 04:08:13,738 INFO L226 Difference]: Without dead ends: 24 [2021-11-03 04:08:13,740 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:08:13,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-03 04:08:13,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-11-03 04:08:13,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:13,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-11-03 04:08:13,747 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 6 [2021-11-03 04:08:13,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:08:13,748 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-11-03 04:08:13,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:13,748 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-11-03 04:08:13,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 04:08:13,750 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:08:13,750 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2021-11-03 04:08:13,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:08:13,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:08:13,971 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:08:13,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:08:13,973 INFO L85 PathProgramCache]: Analyzing trace with hash 919733532, now seen corresponding path program 1 times [2021-11-03 04:08:13,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:08:13,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373999531] [2021-11-03 04:08:13,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:13,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:08:14,023 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 04:08:14,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968506486] [2021-11-03 04:08:14,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:14,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:08:14,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:08:14,026 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:08:14,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-03 04:08:14,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:08:14,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-03 04:08:14,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:08:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:26,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:08:26,451 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:08:26,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373999531] [2021-11-03 04:08:26,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:08:26,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968506486] [2021-11-03 04:08:26,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~b~0] [2021-11-03 04:08:26,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [690142443] [2021-11-03 04:08:26,493 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-03 04:08:26,493 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:08:26,509 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:08:26,517 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:08:26,518 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:08:26,554 INFO L180 QuantifierPusher]: treesize reduction 5, result has 96.4 percent of original size [2021-11-03 04:08:26,556 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:08:26,556 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:08:26,557 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-03 04:08:26,560 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:08:26,561 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:08:26,562 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-03 04:08:26,565 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 135 [2021-11-03 04:08:26,593 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_32|], 10=[|v_#valid_33|]} [2021-11-03 04:08:26,607 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 04:08:26,607 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:08:26,608 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 04:08:26,608 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:08:26,609 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 04:08:26,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 04:08:26,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:08:26,628 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 [2021-11-03 04:08:26,629 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:08:26,630 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-03 04:08:26,630 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:08:26,631 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-03 04:08:26,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 04:08:26,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:08:26,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:08:26,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:08:26,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:08:26,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:08:26,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:08:26,723 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 [2021-11-03 04:08:26,726 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:08:26,731 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:08:26,731 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:08:26,732 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:08:26,732 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-03 04:08:26,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:08:26,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:08:26,791 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:08:26,794 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-03 04:08:26,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 04:08:26,795 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:242, output treesize:105 [2021-11-03 04:08:26,806 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:08:26,822 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-11-03 04:08:26,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:08:26,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:08:26,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:08:26,993 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:08:27,005 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 293 [2021-11-03 04:08:27,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:08:27,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:08:27,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:08:27,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:08:27,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:08:27,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:08:27,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:08:27,158 INFO L180 QuantifierPusher]: treesize reduction 36, result has 56.6 percent of original size [2021-11-03 04:08:27,161 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-03 04:08:27,182 INFO L180 QuantifierPusher]: treesize reduction 36, result has 56.6 percent of original size [2021-11-03 04:08:27,187 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-11-03 04:08:27,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:08:27,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:08:27,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:08:27,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:08:27,245 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:08:30,809 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:08:30,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:08:30,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-03 04:08:30,809 ERROR L172 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2021-11-03 04:08:30,810 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-11-03 04:08:30,817 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 04:08:30,819 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 04:08:30,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-03 04:08:31,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-03 04:08:31,029 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-11-03 04:08:31,033 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-03 04:08:31,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 04:08:31 BoogieIcfgContainer [2021-11-03 04:08:31,074 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-03 04:08:31,075 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-03 04:08:31,075 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-03 04:08:31,075 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-03 04:08:31,075 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:08:09" (3/4) ... [2021-11-03 04:08:31,079 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-03 04:08:31,079 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-03 04:08:31,081 INFO L168 Benchmark]: Toolchain (without parser) took 24355.27 ms. Allocated memory was 127.9 MB in the beginning and 159.4 MB in the end (delta: 31.5 MB). Free memory was 84.9 MB in the beginning and 98.8 MB in the end (delta: -14.0 MB). Peak memory consumption was 16.5 MB. Max. memory is 16.1 GB. [2021-11-03 04:08:31,081 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 127.9 MB. Free memory was 101.8 MB in the beginning and 101.7 MB in the end (delta: 76.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:08:31,082 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.61 ms. Allocated memory is still 127.9 MB. Free memory was 84.6 MB in the beginning and 101.2 MB in the end (delta: -16.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 04:08:31,083 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.90 ms. Allocated memory is still 127.9 MB. Free memory was 101.2 MB in the beginning and 99.5 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:08:31,083 INFO L168 Benchmark]: Boogie Preprocessor took 47.10 ms. Allocated memory is still 127.9 MB. Free memory was 99.5 MB in the beginning and 98.6 MB in the end (delta: 874.9 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-03 04:08:31,084 INFO L168 Benchmark]: RCFGBuilder took 2800.76 ms. Allocated memory is still 127.9 MB. Free memory was 98.2 MB in the beginning and 81.8 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-11-03 04:08:31,085 INFO L168 Benchmark]: TraceAbstraction took 21145.42 ms. Allocated memory was 127.9 MB in the beginning and 159.4 MB in the end (delta: 31.5 MB). Free memory was 81.1 MB in the beginning and 98.8 MB in the end (delta: -17.8 MB). Peak memory consumption was 14.9 MB. Max. memory is 16.1 GB. [2021-11-03 04:08:31,085 INFO L168 Benchmark]: Witness Printer took 4.56 ms. Allocated memory is still 159.4 MB. Free memory is still 98.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:08:31,089 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 127.9 MB. Free memory was 101.8 MB in the beginning and 101.7 MB in the end (delta: 76.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 287.61 ms. Allocated memory is still 127.9 MB. Free memory was 84.6 MB in the beginning and 101.2 MB in the end (delta: -16.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 59.90 ms. Allocated memory is still 127.9 MB. Free memory was 101.2 MB in the beginning and 99.5 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.10 ms. Allocated memory is still 127.9 MB. Free memory was 99.5 MB in the beginning and 98.6 MB in the end (delta: 874.9 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2800.76 ms. Allocated memory is still 127.9 MB. Free memory was 98.2 MB in the beginning and 81.8 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 21145.42 ms. Allocated memory was 127.9 MB in the beginning and 159.4 MB in the end (delta: 31.5 MB). Free memory was 81.1 MB in the beginning and 98.8 MB in the end (delta: -17.8 MB). Peak memory consumption was 14.9 MB. Max. memory is 16.1 GB. * Witness Printer took 4.56 ms. Allocated memory is still 159.4 MB. Free memory is still 98.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * 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() [L16] COND TRUE !cond [L30] B = __VERIFIER_nondet_uint() [L16] COND FALSE !(!cond) [L16] COND FALSE !(!cond) [L16] COND TRUE !cond [L34] q = 0 [L35] r = A [L36] b = B [L37] COND TRUE 1 [L38] COND FALSE !(!(r >= b)) [L39] b = 2 * b [L37] COND TRUE 1 [L38] COND FALSE !(!(r >= b)) [L39] b = 2 * b [L37] COND TRUE 1 [L38] COND TRUE !(r >= b) [L41] COND TRUE 1 [L19] COND TRUE !(cond) [L21] reach_error() - UnprovableResult [Line: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 21.0s, OverallIterations: 3, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 18 SDslu, 18 SDs, 0 SdLazy, 41 SolverSat, 14 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=2, InterpolantAutomatonStates: 10, 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, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 13.0s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 23 ConstructedInterpolants, 0 QuantifiedInterpolants, 353 SizeOfPredicates, 14 NumberOfNonLiveVariables, 104 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 2/6 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 [2021-11-03 04:08:31,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/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_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound20.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH --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 67e1f0759ae3eef1dbaa6f8b0d73161640ce69ba156f9f744d71e8aa9cf95f87 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:08:34,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:08:34,025 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:08:34,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:08:34,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:08:34,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:08:34,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:08:34,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:08:34,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:08:34,115 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:08:34,117 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:08:34,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:08:34,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:08:34,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:08:34,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:08:34,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:08:34,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:08:34,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:08:34,136 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:08:34,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:08:34,151 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:08:34,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:08:34,160 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:08:34,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:08:34,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:08:34,167 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:08:34,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:08:34,169 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:08:34,170 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:08:34,171 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:08:34,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:08:34,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:08:34,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:08:34,175 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:08:34,176 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:08:34,177 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:08:34,177 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:08:34,178 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:08:34,178 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:08:34,179 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:08:34,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:08:34,181 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 04:08:34,223 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:08:34,223 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:08:34,225 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:08:34,225 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:08:34,225 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:08:34,225 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:08:34,226 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:08:34,226 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:08:34,226 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:08:34,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:08:34,229 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:08:34,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:08:34,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:08:34,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:08:34,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:08:34,231 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:08:34,231 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:08:34,231 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:08:34,232 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:08:34,232 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:08:34,232 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:08:34,232 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:08:34,232 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:08:34,233 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:08:34,233 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:08:34,233 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:08:34,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:08:34,234 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:08:34,234 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:08:34,234 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:08:34,234 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:08:34,235 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:08:34,235 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:08:34,235 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:08:34,236 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:08:34,236 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_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67e1f0759ae3eef1dbaa6f8b0d73161640ce69ba156f9f744d71e8aa9cf95f87 [2021-11-03 04:08:34,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:08:34,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:08:34,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:08:34,766 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:08:34,767 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:08:34,768 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound20.i [2021-11-03 04:08:34,841 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/data/17537a5d8/68b1541afd8f4dd79506660e902320b8/FLAGb88556680 [2021-11-03 04:08:35,483 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:08:35,484 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound20.i [2021-11-03 04:08:35,496 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/data/17537a5d8/68b1541afd8f4dd79506660e902320b8/FLAGb88556680 [2021-11-03 04:08:35,804 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/data/17537a5d8/68b1541afd8f4dd79506660e902320b8 [2021-11-03 04:08:35,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:08:35,809 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:08:35,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:08:35,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:08:35,831 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:08:35,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:08:35" (1/1) ... [2021-11-03 04:08:35,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3056381a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:08:35, skipping insertion in model container [2021-11-03 04:08:35,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:08:35" (1/1) ... [2021-11-03 04:08:35,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:08:35,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:08:36,032 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_12a33d26-46d8-48f8-9018-789ff63c7269/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound20.i[950,963] [2021-11-03 04:08:36,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:08:36,063 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:08:36,077 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_12a33d26-46d8-48f8-9018-789ff63c7269/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound20.i[950,963] [2021-11-03 04:08:36,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:08:36,133 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:08:36,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:08:36 WrapperNode [2021-11-03 04:08:36,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:08:36,135 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:08:36,135 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:08:36,135 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:08:36,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:08:36" (1/1) ... [2021-11-03 04:08:36,180 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:08:36" (1/1) ... [2021-11-03 04:08:36,208 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:08:36,209 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:08:36,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:08:36,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:08:36,219 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:08:36" (1/1) ... [2021-11-03 04:08:36,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:08:36" (1/1) ... [2021-11-03 04:08:36,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:08:36" (1/1) ... [2021-11-03 04:08:36,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:08:36" (1/1) ... [2021-11-03 04:08:36,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:08:36" (1/1) ... [2021-11-03 04:08:36,251 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:08:36" (1/1) ... [2021-11-03 04:08:36,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:08:36" (1/1) ... [2021-11-03 04:08:36,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:08:36,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:08:36,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:08:36,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:08:36,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:08:36" (1/1) ... [2021-11-03 04:08:36,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:08:36,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:08:36,312 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:08:36,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:08:36,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:08:36,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:08:36,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:08:36,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:08:36,852 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:08:36,853 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-11-03 04:08:36,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:08:36 BoogieIcfgContainer [2021-11-03 04:08:36,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:08:36,857 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:08:36,857 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:08:36,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:08:36,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:08:35" (1/3) ... [2021-11-03 04:08:36,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@333a4aa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:08:36, skipping insertion in model container [2021-11-03 04:08:36,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:08:36" (2/3) ... [2021-11-03 04:08:36,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@333a4aa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:08:36, skipping insertion in model container [2021-11-03 04:08:36,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:08:36" (3/3) ... [2021-11-03 04:08:36,877 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound20.i [2021-11-03 04:08:36,883 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:08:36,883 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-03 04:08:36,981 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:08:36,995 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 [2021-11-03 04:08:36,996 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-03 04:08:37,026 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:37,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-03 04:08:37,032 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:08:37,032 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:08:37,033 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:08:37,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:08:37,040 INFO L85 PathProgramCache]: Analyzing trace with hash -174569337, now seen corresponding path program 1 times [2021-11-03 04:08:37,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:08:37,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2072278760] [2021-11-03 04:08:37,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:37,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:08:37,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:08:37,066 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:08:37,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:08:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:08:37,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 04:08:37,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:08:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:37,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:08:37,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:37,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:08:37,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2072278760] [2021-11-03 04:08:37,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2072278760] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:08:37,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:08:37,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:08:37,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339339292] [2021-11-03 04:08:37,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 04:08:37,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:08:37,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 04:08:37,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:08:37,442 INFO L87 Difference]: Start difference. First operand has 26 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:37,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:08:37,460 INFO L93 Difference]: Finished difference Result 49 states and 72 transitions. [2021-11-03 04:08:37,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 04:08:37,462 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-03 04:08:37,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:08:37,471 INFO L225 Difference]: With dead ends: 49 [2021-11-03 04:08:37,472 INFO L226 Difference]: Without dead ends: 22 [2021-11-03 04:08:37,474 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:08:37,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-03 04:08:37,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-03 04:08:37,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:37,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-11-03 04:08:37,508 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2021-11-03 04:08:37,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:08:37,509 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-11-03 04:08:37,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:37,510 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-11-03 04:08:37,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-03 04:08:37,510 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:08:37,511 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:08:37,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:08:37,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:08:37,724 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:08:37,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:08:37,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1454099019, now seen corresponding path program 1 times [2021-11-03 04:08:37,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:08:37,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75755271] [2021-11-03 04:08:37,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:37,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:08:37,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:08:37,739 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:08:37,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:08:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:08:37,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-03 04:08:37,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:08:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:38,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:08:39,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:39,009 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:08:39,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75755271] [2021-11-03 04:08:39,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75755271] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:08:39,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:08:39,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 4] imperfect sequences [] total 10 [2021-11-03 04:08:39,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087048777] [2021-11-03 04:08:39,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:08:39,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:08:39,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:08:39,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:08:39,016 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:40,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:08:40,791 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2021-11-03 04:08:40,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:08:40,792 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-03 04:08:40,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:08:40,793 INFO L225 Difference]: With dead ends: 46 [2021-11-03 04:08:40,794 INFO L226 Difference]: Without dead ends: 38 [2021-11-03 04:08:40,795 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-11-03 04:08:40,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-03 04:08:40,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2021-11-03 04:08:40,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:40,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-11-03 04:08:40,806 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 15 [2021-11-03 04:08:40,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:08:40,806 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-11-03 04:08:40,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:40,807 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-11-03 04:08:40,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-03 04:08:40,808 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:08:40,808 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:08:40,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:08:41,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:08:41,029 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:08:41,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:08:41,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1807844991, now seen corresponding path program 1 times [2021-11-03 04:08:41,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:08:41,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884926229] [2021-11-03 04:08:41,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:41,032 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:08:41,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:08:41,035 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:08:41,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:08:41,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:08:41,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:08:41,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:08:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 04:08:41,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:08:42,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 04:08:42,285 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:08:42,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884926229] [2021-11-03 04:08:42,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884926229] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:08:42,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:08:42,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [] total 8 [2021-11-03 04:08:42,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797342485] [2021-11-03 04:08:42,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:08:42,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:08:42,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:08:42,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:08:42,290 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:42,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:08:42,761 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-11-03 04:08:42,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:08:42,764 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-03 04:08:42,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:08:42,765 INFO L225 Difference]: With dead ends: 49 [2021-11-03 04:08:42,765 INFO L226 Difference]: Without dead ends: 43 [2021-11-03 04:08:42,766 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-03 04:08:42,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-03 04:08:42,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2021-11-03 04:08:42,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:42,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-11-03 04:08:42,785 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 19 [2021-11-03 04:08:42,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:08:42,786 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-11-03 04:08:42,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:42,787 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-11-03 04:08:42,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-03 04:08:42,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:08:42,791 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:08:42,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:08:43,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:08:43,008 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:08:43,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:08:43,009 INFO L85 PathProgramCache]: Analyzing trace with hash 567763771, now seen corresponding path program 1 times [2021-11-03 04:08:43,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:08:43,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926009818] [2021-11-03 04:08:43,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:43,010 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:08:43,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:08:43,013 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:08:43,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:08:43,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:08:43,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-03 04:08:43,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:08:44,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:44,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:08:48,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:48,019 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:08:48,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926009818] [2021-11-03 04:08:48,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926009818] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:08:48,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [468218040] [2021-11-03 04:08:48,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:48,022 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:08:48,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:08:48,028 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:08:48,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-03 04:08:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:08:48,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-03 04:08:48,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:08:53,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:53,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:08:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:54,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [468218040] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:08:54,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104861201] [2021-11-03 04:08:54,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:54,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:08:54,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:08:54,807 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:08:54,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-03 04:08:55,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:08:55,015 WARN L261 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-03 04:08:55,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:08:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:56,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:08:59,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:59,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104861201] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:08:59,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:08:59,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7, 6, 16, 9] total 31 [2021-11-03 04:08:59,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62986224] [2021-11-03 04:08:59,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-03 04:08:59,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:08:59,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-03 04:08:59,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=731, Unknown=1, NotChecked=0, Total=930 [2021-11-03 04:08:59,517 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:09,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:09:09,531 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-11-03 04:09:09,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-03 04:09:09,534 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-03 04:09:09,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:09:09,535 INFO L225 Difference]: With dead ends: 69 [2021-11-03 04:09:09,536 INFO L226 Difference]: Without dead ends: 53 [2021-11-03 04:09:09,538 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=585, Invalid=1765, Unknown=2, NotChecked=0, Total=2352 [2021-11-03 04:09:09,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-03 04:09:09,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2021-11-03 04:09:09,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:09,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-11-03 04:09:09,547 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 21 [2021-11-03 04:09:09,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:09:09,548 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-11-03 04:09:09,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:09,548 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-11-03 04:09:09,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-03 04:09:09,550 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:09:09,550 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:09:09,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-03 04:09:09,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-03 04:09:09,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:09:10,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:09:10,169 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:09:10,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:09:10,170 INFO L85 PathProgramCache]: Analyzing trace with hash -409722187, now seen corresponding path program 1 times [2021-11-03 04:09:10,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:09:10,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947211070] [2021-11-03 04:09:10,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:09:10,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:09:10,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:09:10,172 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:09:10,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:09:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:09:10,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:09:10,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:09:10,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 04:09:10,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:09:10,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 04:09:10,531 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:09:10,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947211070] [2021-11-03 04:09:10,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947211070] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:09:10,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:09:10,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:09:10,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220541791] [2021-11-03 04:09:10,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:09:10,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:09:10,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:09:10,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:09:10,535 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:10,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:09:10,597 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2021-11-03 04:09:10,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:09:10,598 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-03 04:09:10,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:09:10,599 INFO L225 Difference]: With dead ends: 51 [2021-11-03 04:09:10,599 INFO L226 Difference]: Without dead ends: 31 [2021-11-03 04:09:10,600 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:09:10,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-03 04:09:10,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-03 04:09:10,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:10,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-11-03 04:09:10,605 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 23 [2021-11-03 04:09:10,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:09:10,606 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-11-03 04:09:10,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:10,606 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-11-03 04:09:10,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-03 04:09:10,606 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:09:10,607 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:09:10,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-03 04:09:10,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:09:10,807 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:09:10,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:09:10,808 INFO L85 PathProgramCache]: Analyzing trace with hash -572229456, now seen corresponding path program 2 times [2021-11-03 04:09:10,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:09:10,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [702963787] [2021-11-03 04:09:10,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:09:10,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:09:10,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:09:10,810 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:09:10,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:09:11,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:09:11,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:09:11,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:09:11,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:09:11,294 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:09:11,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:09:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:09:11,532 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:09:11,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [702963787] [2021-11-03 04:09:11,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [702963787] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:09:11,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [130688948] [2021-11-03 04:09:11,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:09:11,533 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:09:11,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:09:11,536 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:09:11,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-03 04:09:11,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:09:11,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:09:11,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-03 04:09:11,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:09:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:09:12,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:09:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:09:13,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [130688948] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:09:13,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248181089] [2021-11-03 04:09:13,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:09:13,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:09:13,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:09:13,091 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:09:13,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-03 04:09:13,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:09:13,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:09:13,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 04:09:13,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:09:14,203 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:09:14,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:09:14,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:09:14,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248181089] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:09:14,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:09:14,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 9, 8, 12, 7] total 29 [2021-11-03 04:09:14,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893308853] [2021-11-03 04:09:14,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-03 04:09:14,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:09:14,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-03 04:09:14,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2021-11-03 04:09:14,525 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:15,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:09:15,217 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2021-11-03 04:09:15,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-03 04:09:15,219 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-03 04:09:15,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:09:15,221 INFO L225 Difference]: With dead ends: 55 [2021-11-03 04:09:15,221 INFO L226 Difference]: Without dead ends: 38 [2021-11-03 04:09:15,222 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=319, Invalid=1013, Unknown=0, NotChecked=0, Total=1332 [2021-11-03 04:09:15,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-03 04:09:15,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2021-11-03 04:09:15,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:15,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-11-03 04:09:15,230 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 25 [2021-11-03 04:09:15,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:09:15,231 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-11-03 04:09:15,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:15,232 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-11-03 04:09:15,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 04:09:15,233 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:09:15,233 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:09:15,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:09:15,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-11-03 04:09:15,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:09:15,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:09:15,850 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:09:15,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:09:15,851 INFO L85 PathProgramCache]: Analyzing trace with hash -2122892309, now seen corresponding path program 3 times [2021-11-03 04:09:15,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:09:15,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [837198848] [2021-11-03 04:09:15,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:09:15,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:09:15,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:09:15,857 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:09:15,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:09:16,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-03 04:09:16,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:09:16,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-03 04:09:16,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:09:18,442 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:09:18,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:09:27,673 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:09:27,673 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:09:27,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [837198848] [2021-11-03 04:09:27,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [837198848] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:09:27,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [711824633] [2021-11-03 04:09:27,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:09:27,674 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:09:27,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:09:27,684 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:09:27,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-03 04:09:28,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-03 04:09:28,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:09:28,282 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-03 04:09:28,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:09:31,589 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:09:31,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:10:00,907 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:10:00,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [711824633] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:10:00,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083949783] [2021-11-03 04:10:00,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:10:00,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:10:00,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:10:00,910 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:10:00,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-03 04:10:01,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-03 04:10:01,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:10:01,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-03 04:10:01,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:10:02,366 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:10:02,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:10:05,101 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:10:05,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083949783] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:10:05,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:10:05,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 18, 12, 16, 12] total 37 [2021-11-03 04:10:05,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411447500] [2021-11-03 04:10:05,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-03 04:10:05,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:10:05,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-03 04:10:05,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1073, Unknown=10, NotChecked=0, Total=1332 [2021-11-03 04:10:05,103 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:01,651 WARN L207 SmtUtils]: Spent 48.96 s on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-11-03 04:11:36,341 WARN L207 SmtUtils]: Spent 33.34 s on a formula simplification. DAG size of input: 91 DAG size of output: 45 [2021-11-03 04:12:10,639 WARN L207 SmtUtils]: Spent 33.04 s on a formula simplification. DAG size of input: 89 DAG size of output: 43 [2021-11-03 04:12:46,051 WARN L207 SmtUtils]: Spent 33.07 s on a formula simplification. DAG size of input: 96 DAG size of output: 51 [2021-11-03 04:13:20,082 WARN L207 SmtUtils]: Spent 33.18 s on a formula simplification. DAG size of input: 92 DAG size of output: 47 [2021-11-03 04:13:20,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:20,765 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-11-03 04:13:20,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-03 04:13:20,769 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-03 04:13:20,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:20,770 INFO L225 Difference]: With dead ends: 60 [2021-11-03 04:13:20,770 INFO L226 Difference]: Without dead ends: 52 [2021-11-03 04:13:20,771 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 120 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 224.5s TimeCoverageRelationStatistics Valid=710, Invalid=2586, Unknown=10, NotChecked=0, Total=3306 [2021-11-03 04:13:20,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-03 04:13:20,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2021-11-03 04:13:20,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:20,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-11-03 04:13:20,778 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 27 [2021-11-03 04:13:20,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:20,779 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-11-03 04:13:20,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:20,779 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-11-03 04:13:20,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-03 04:13:20,780 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:20,780 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:13:20,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:13:20,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:13:21,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:13:21,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:13:21,383 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:13:21,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:21,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1133017440, now seen corresponding path program 4 times [2021-11-03 04:13:21,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:13:21,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297355549] [2021-11-03 04:13:21,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:13:21,387 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:13:21,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:13:21,391 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:13:21,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:13:21,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:13:21,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:13:21,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-03 04:13:21,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:13:22,255 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:13:22,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:13:23,287 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:13:23,287 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:13:23,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297355549] [2021-11-03 04:13:23,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297355549] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:13:23,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [629818011] [2021-11-03 04:13:23,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:13:23,287 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:13:23,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:13:23,288 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:13:23,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-03 04:13:23,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:13:23,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:13:23,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-03 04:13:23,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:13:24,637 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:13:24,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:13:25,278 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:13:25,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [629818011] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:13:25,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375822679] [2021-11-03 04:13:25,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:13:25,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:13:25,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:13:25,295 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:13:25,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-03 04:13:25,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:13:25,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:13:25,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-03 04:13:25,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:13:27,217 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:13:27,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:13:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:13:29,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375822679] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:13:29,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:13:29,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11, 10, 17, 11] total 47 [2021-11-03 04:13:29,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805908819] [2021-11-03 04:13:29,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-03 04:13:29,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:13:29,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-03 04:13:29,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1792, Unknown=0, NotChecked=0, Total=2162 [2021-11-03 04:13:29,348 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 47 states, 47 states have (on average 2.7872340425531914) internal successors, (131), 47 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:31,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:31,484 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2021-11-03 04:13:31,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-03 04:13:31,496 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.7872340425531914) internal successors, (131), 47 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-03 04:13:31,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:31,498 INFO L225 Difference]: With dead ends: 75 [2021-11-03 04:13:31,498 INFO L226 Difference]: Without dead ends: 51 [2021-11-03 04:13:31,500 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=731, Invalid=2929, Unknown=0, NotChecked=0, Total=3660 [2021-11-03 04:13:31,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-03 04:13:31,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2021-11-03 04:13:31,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 37 states have (on average 1.135135135135135) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:31,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-11-03 04:13:31,516 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 31 [2021-11-03 04:13:31,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:31,516 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-11-03 04:13:31,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.7872340425531914) internal successors, (131), 47 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:31,517 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-11-03 04:13:31,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-03 04:13:31,518 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:31,518 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:13:31,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:13:31,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:13:31,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:13:32,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:13:32,123 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:13:32,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:32,123 INFO L85 PathProgramCache]: Analyzing trace with hash 30188635, now seen corresponding path program 5 times [2021-11-03 04:13:32,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:13:32,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058219474] [2021-11-03 04:13:32,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-03 04:13:32,123 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:13:32,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:13:32,124 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:13:32,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:13:32,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-03 04:13:32,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:13:32,666 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-03 04:13:32,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:13:35,419 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:13:35,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:30,315 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse4 (bvmul c_ULTIMATE.start_main_~b~0 (_ bv8 32)))) (let ((.cse5 (bvudiv .cse4 (_ bv2 32)))) (let ((.cse1 (bvudiv .cse5 (_ bv2 32)))) (let ((.cse0 (bvneg .cse5)) (.cse3 (bvudiv .cse1 (_ bv2 32))) (.cse2 (bvneg .cse1))) (or (not (= (bvadd .cse0 c_ULTIMATE.start_main_~r~0 (bvmul (_ bv4 32) (bvmul c_ULTIMATE.start_main_~q~0 .cse1)) (bvmul (_ bv3 32) .cse1) .cse2) c_ULTIMATE.start_main_~A~0)) (not (bvuge (bvadd .cse0 c_ULTIMATE.start_main_~r~0) .cse1)) (not (bvuge c_ULTIMATE.start_main_~r~0 (bvmul (_ bv2 32) c_ULTIMATE.start_main_~b~0))) (not (bvuge c_ULTIMATE.start_main_~r~0 (bvmul c_ULTIMATE.start_main_~b~0 (_ bv4 32)))) (not (bvuge (bvadd .cse0 c_ULTIMATE.start_main_~r~0 .cse2) .cse3)) (bvuge c_ULTIMATE.start_main_~r~0 .cse4) (= (bvadd .cse0 (bvmul (_ bv7 32) .cse3) (bvmul (_ bv8 32) (bvmul c_ULTIMATE.start_main_~q~0 .cse3)) c_ULTIMATE.start_main_~r~0 (bvneg .cse3) .cse2) c_ULTIMATE.start_main_~A~0)))))) is different from true [2021-11-03 04:14:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-03 04:14:54,473 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:14:54,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058219474] [2021-11-03 04:14:54,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058219474] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:14:54,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1123440963] [2021-11-03 04:14:54,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-03 04:14:54,474 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:14:54,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:14:54,475 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:14:54,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-03 04:14:55,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-03 04:14:55,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:14:55,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-03 04:14:55,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:57,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:16:26,162 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:16:26,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1123440963] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:16:26,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15623968] [2021-11-03 04:16:26,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-03 04:16:26,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:16:26,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:16:26,178 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:16:26,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12a33d26-46d8-48f8-9018-789ff63c7269/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-03 04:16:27,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-03 04:16:27,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:16:27,044 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-03 04:16:27,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:16:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:16:30,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:16:50,921 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:16:50,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15623968] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:16:50,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:16:50,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 18, 17, 23, 17] total 52 [2021-11-03 04:16:50,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831061709] [2021-11-03 04:16:50,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-03 04:16:50,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:16:50,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-03 04:16:50,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=2094, Unknown=29, NotChecked=98, Total=2652 [2021-11-03 04:16:50,925 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 52 states, 52 states have (on average 1.8846153846153846) internal successors, (98), 52 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:17:16,080 WARN L207 SmtUtils]: Spent 5.51 s on a formula simplification. DAG size of input: 134 DAG size of output: 102 [2021-11-03 04:19:07,210 WARN L207 SmtUtils]: Spent 1.56 m on a formula simplification. DAG size of input: 188 DAG size of output: 78