./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ecd26f30dcf2e00e51585057257a3ebe53fdc2d12652276addf710ad43d7dfd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:11:32,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:11:32,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:11:32,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:11:32,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:11:32,496 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:11:32,498 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:11:32,502 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:11:32,505 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:11:32,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:11:32,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:11:32,513 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:11:32,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:11:32,516 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:11:32,518 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:11:32,523 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:11:32,525 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:11:32,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:11:32,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:11:32,539 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:11:32,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:11:32,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:11:32,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:11:32,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:11:32,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:11:32,556 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:11:32,556 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:11:32,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:11:32,559 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:11:32,560 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:11:32,561 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:11:32,562 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:11:32,564 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:11:32,565 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:11:32,566 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:11:32,567 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:11:32,568 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:11:32,568 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:11:32,568 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:11:32,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:11:32,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:11:32,571 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:11:32,619 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:11:32,619 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:11:32,620 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:11:32,620 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:11:32,621 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:11:32,621 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:11:32,622 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:11:32,622 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:11:32,622 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:11:32,622 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:11:32,623 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:11:32,624 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:11:32,624 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:11:32,624 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:11:32,624 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:11:32,625 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:11:32,625 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:11:32,625 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:11:32,626 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:11:32,626 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:11:32,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:11:32,627 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:11:32,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:11:32,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:11:32,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:11:32,628 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:11:32,628 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:11:32,628 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:11:32,628 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:11:32,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:11:32,629 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:11:32,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:11:32,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:11:32,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:11:32,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:11:32,630 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:11:32,631 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:11:32,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:11:32,631 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:11:32,631 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:11:32,631 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:11:32,632 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_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ecd26f30dcf2e00e51585057257a3ebe53fdc2d12652276addf710ad43d7dfd [2021-11-23 02:11:32,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:11:32,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:11:32,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:11:32,991 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:11:32,991 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:11:32,992 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound100.c [2021-11-23 02:11:33,052 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/data/9089b6277/aa1cfd08161249f188036fea2cd480a2/FLAGc0195ca93 [2021-11-23 02:11:33,523 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:11:33,526 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound100.c [2021-11-23 02:11:33,538 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/data/9089b6277/aa1cfd08161249f188036fea2cd480a2/FLAGc0195ca93 [2021-11-23 02:11:33,894 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/data/9089b6277/aa1cfd08161249f188036fea2cd480a2 [2021-11-23 02:11:33,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:11:33,897 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:11:33,898 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:11:33,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:11:33,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:11:33,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:11:33" (1/1) ... [2021-11-23 02:11:33,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a44b103 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:33, skipping insertion in model container [2021-11-23 02:11:33,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:11:33" (1/1) ... [2021-11-23 02:11:33,913 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:11:33,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:11:34,181 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound100.c[588,601] [2021-11-23 02:11:34,221 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:11:34,231 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:11:34,247 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound100.c[588,601] [2021-11-23 02:11:34,273 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:11:34,295 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:11:34,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:34 WrapperNode [2021-11-23 02:11:34,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:11:34,298 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:11:34,298 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:11:34,299 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:11:34,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:34" (1/1) ... [2021-11-23 02:11:34,324 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:34" (1/1) ... [2021-11-23 02:11:34,352 INFO L137 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2021-11-23 02:11:34,353 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:11:34,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:11:34,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:11:34,354 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:11:34,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:34" (1/1) ... [2021-11-23 02:11:34,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:34" (1/1) ... [2021-11-23 02:11:34,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:34" (1/1) ... [2021-11-23 02:11:34,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:34" (1/1) ... [2021-11-23 02:11:34,382 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:34" (1/1) ... [2021-11-23 02:11:34,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:34" (1/1) ... [2021-11-23 02:11:34,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:34" (1/1) ... [2021-11-23 02:11:34,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:11:34,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:11:34,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:11:34,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:11:34,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:34" (1/1) ... [2021-11-23 02:11:34,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:11:34,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:11:34,440 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:11:34,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:11:34,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:11:34,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:11:34,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:11:34,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:11:34,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 02:11:34,488 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 02:11:34,558 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:11:34,560 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:11:34,718 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:11:34,754 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:11:34,754 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:11:34,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:11:34 BoogieIcfgContainer [2021-11-23 02:11:34,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:11:34,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:11:34,759 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:11:34,765 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:11:34,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:11:33" (1/3) ... [2021-11-23 02:11:34,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32d1e6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:11:34, skipping insertion in model container [2021-11-23 02:11:34,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:34" (2/3) ... [2021-11-23 02:11:34,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32d1e6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:11:34, skipping insertion in model container [2021-11-23 02:11:34,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:11:34" (3/3) ... [2021-11-23 02:11:34,768 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound100.c [2021-11-23 02:11:34,776 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:11:34,776 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:11:34,828 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:11:34,836 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:11:34,836 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:11:34,853 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-23 02:11:34,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 02:11:34,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:34,858 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 02:11:34,859 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:34,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:34,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1070258279, now seen corresponding path program 1 times [2021-11-23 02:11:34,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:34,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902344975] [2021-11-23 02:11:34,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:34,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:35,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:11:35,190 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:35,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902344975] [2021-11-23 02:11:35,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902344975] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:35,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:35,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:11:35,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943776873] [2021-11-23 02:11:35,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:35,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:11:35,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:35,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:11:35,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:11:35,237 INFO L87 Difference]: Start difference. First operand has 22 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:11:35,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:35,407 INFO L93 Difference]: Finished difference Result 47 states and 82 transitions. [2021-11-23 02:11:35,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:11:35,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 02:11:35,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:35,417 INFO L225 Difference]: With dead ends: 47 [2021-11-23 02:11:35,417 INFO L226 Difference]: Without dead ends: 24 [2021-11-23 02:11:35,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:11:35,425 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:35,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 74 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:11:35,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-23 02:11:35,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-23 02:11:35,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-23 02:11:35,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2021-11-23 02:11:35,469 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 6 [2021-11-23 02:11:35,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:35,470 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2021-11-23 02:11:35,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:11:35,470 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2021-11-23 02:11:35,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 02:11:35,472 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:35,472 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:35,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:11:35,473 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:35,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:35,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1088770990, now seen corresponding path program 1 times [2021-11-23 02:11:35,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:35,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796400347] [2021-11-23 02:11:35,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:35,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:35,489 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:11:35,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [182858690] [2021-11-23 02:11:35,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:35,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:11:35,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:11:35,492 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:11:35,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:11:35,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:35,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:11:35,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:11:35,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:11:35,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:11:35,647 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:35,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796400347] [2021-11-23 02:11:35,648 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:11:35,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182858690] [2021-11-23 02:11:35,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182858690] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:35,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:35,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:11:35,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652853105] [2021-11-23 02:11:35,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:35,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:11:35,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:35,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:11:35,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:11:35,652 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:11:35,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:35,743 INFO L93 Difference]: Finished difference Result 43 states and 62 transitions. [2021-11-23 02:11:35,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:11:35,744 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-23 02:11:35,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:35,745 INFO L225 Difference]: With dead ends: 43 [2021-11-23 02:11:35,746 INFO L226 Difference]: Without dead ends: 41 [2021-11-23 02:11:35,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:11:35,748 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:35,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 122 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:11:35,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-23 02:11:35,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2021-11-23 02:11:35,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 16 states have internal predecessors, (16), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-23 02:11:35,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2021-11-23 02:11:35,765 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 11 [2021-11-23 02:11:35,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:35,766 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2021-11-23 02:11:35,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:11:35,766 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2021-11-23 02:11:35,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 02:11:35,767 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:35,768 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:35,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:11:35,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:11:35,990 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:35,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:35,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1026209031, now seen corresponding path program 1 times [2021-11-23 02:11:35,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:35,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059781893] [2021-11-23 02:11:35,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:35,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:36,002 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:11:36,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997188465] [2021-11-23 02:11:36,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:36,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:11:36,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:11:36,004 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:11:36,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:11:36,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:36,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:11:36,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:11:36,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:11:36,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:11:36,180 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:36,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059781893] [2021-11-23 02:11:36,180 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:11:36,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997188465] [2021-11-23 02:11:36,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997188465] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:36,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:36,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:11:36,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493163973] [2021-11-23 02:11:36,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:36,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:11:36,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:36,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:11:36,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:11:36,184 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:11:36,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:36,243 INFO L93 Difference]: Finished difference Result 47 states and 65 transitions. [2021-11-23 02:11:36,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:11:36,244 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2021-11-23 02:11:36,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:36,245 INFO L225 Difference]: With dead ends: 47 [2021-11-23 02:11:36,246 INFO L226 Difference]: Without dead ends: 45 [2021-11-23 02:11:36,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:11:36,248 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:36,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 119 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:11:36,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-23 02:11:36,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2021-11-23 02:11:36,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-23 02:11:36,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 56 transitions. [2021-11-23 02:11:36,265 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 56 transitions. Word has length 16 [2021-11-23 02:11:36,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:36,266 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 56 transitions. [2021-11-23 02:11:36,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:11:36,266 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 56 transitions. [2021-11-23 02:11:36,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 02:11:36,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:36,267 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:36,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-23 02:11:36,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:11:36,481 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:36,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:36,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1104948110, now seen corresponding path program 1 times [2021-11-23 02:11:36,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:36,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266901507] [2021-11-23 02:11:36,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:36,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:36,493 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:11:36,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670362303] [2021-11-23 02:11:36,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:36,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:11:36,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:11:36,495 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:11:36,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:11:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:36,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:11:36,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:11:36,711 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:11:36,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:11:36,712 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:36,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266901507] [2021-11-23 02:11:36,712 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:11:36,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670362303] [2021-11-23 02:11:36,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670362303] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:36,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:36,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:11:36,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659020362] [2021-11-23 02:11:36,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:36,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:11:36,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:36,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:11:36,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:11:36,715 INFO L87 Difference]: Start difference. First operand 41 states and 56 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:11:36,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:36,823 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2021-11-23 02:11:36,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:11:36,823 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2021-11-23 02:11:36,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:36,825 INFO L225 Difference]: With dead ends: 55 [2021-11-23 02:11:36,825 INFO L226 Difference]: Without dead ends: 43 [2021-11-23 02:11:36,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:11:36,827 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:36,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 111 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:11:36,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-23 02:11:36,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-23 02:11:36,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-23 02:11:36,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-11-23 02:11:36,848 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 21 [2021-11-23 02:11:36,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:36,853 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-11-23 02:11:36,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:11:36,853 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-11-23 02:11:36,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 02:11:36,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:36,855 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:36,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-23 02:11:37,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:11:37,058 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:37,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:37,059 INFO L85 PathProgramCache]: Analyzing trace with hash -700920967, now seen corresponding path program 1 times [2021-11-23 02:11:37,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:37,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341301353] [2021-11-23 02:11:37,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:37,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:37,075 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:11:37,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1063529794] [2021-11-23 02:11:37,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:37,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:11:37,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:11:37,094 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:11:37,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:11:37,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:37,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:11:37,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:11:37,373 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 02:11:37,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:11:37,539 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 02:11:37,540 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:37,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341301353] [2021-11-23 02:11:37,540 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:11:37,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063529794] [2021-11-23 02:11:37,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063529794] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:11:37,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1005400781] [2021-11-23 02:11:37,571 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-23 02:11:37,571 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:11:37,575 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:11:37,581 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:11:37,581 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:11:43,586 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2021-11-23 02:11:43,594 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:11:45,501 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '942#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:11:45,501 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:11:45,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:11:45,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-23 02:11:45,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088030695] [2021-11-23 02:11:45,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:11:45,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:11:45,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:45,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:11:45,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-11-23 02:11:45,504 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-23 02:11:45,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:45,850 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2021-11-23 02:11:45,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:11:45,851 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 38 [2021-11-23 02:11:45,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:45,853 INFO L225 Difference]: With dead ends: 66 [2021-11-23 02:11:45,853 INFO L226 Difference]: Without dead ends: 64 [2021-11-23 02:11:45,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:11:45,855 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 9 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:45,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 142 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:11:45,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-23 02:11:45,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 51. [2021-11-23 02:11:45,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-23 02:11:45,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2021-11-23 02:11:45,873 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 38 [2021-11-23 02:11:45,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:45,874 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2021-11-23 02:11:45,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-23 02:11:45,875 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2021-11-23 02:11:45,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 02:11:45,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:45,876 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:45,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:11:46,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:11:46,082 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:46,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:46,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1757443022, now seen corresponding path program 2 times [2021-11-23 02:11:46,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:46,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727288250] [2021-11-23 02:11:46,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:46,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:46,095 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:11:46,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634183969] [2021-11-23 02:11:46,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:11:46,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:11:46,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:11:46,100 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:11:46,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d59d781-1d05-4f9b-a875-89c415ac069f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:11:46,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 02:11:46,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:11:46,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:11:46,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:11:46,333 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-23 02:11:46,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:11:46,460 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-23 02:11:46,460 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:46,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727288250] [2021-11-23 02:11:46,460 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:11:46,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634183969] [2021-11-23 02:11:46,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634183969] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:11:46,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [503985143] [2021-11-23 02:11:46,465 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-23 02:11:46,465 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:11:46,465 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:11:46,466 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:11:46,466 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs